Ireland (, ; ;
Ulster-Scots: ) is an island in the
North Atlantic Ocean, in
Northwestern Europe
Northwestern Europe, or Northwest Europe, is a loosely defined subregion of Europe, overlapping Northern and Western Europe. The term is used in geographic, history, and military contexts.
Geographic definitions
Geographically, Northwestern ...
. Geopolitically, the island is divided between the
Republic of Ireland
Ireland ( ), also known as the Republic of Ireland (), is a country in Northwestern Europe, north-western Europe consisting of 26 of the 32 Counties of Ireland, counties of the island of Ireland, with a population of about 5.4 million. ...
(officially
named Irelanda sovereign state covering five-sixths of the island) and
Northern Ireland
Northern Ireland ( ; ) is a Countries of the United Kingdom, part of the United Kingdom in the north-east of the island of Ireland. It has been #Descriptions, variously described as a country, province or region. Northern Ireland shares Repub ...
(part of the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
covering the remaining sixth). It is separated from
Great Britain
Great Britain is an island in the North Atlantic Ocean off the north-west coast of continental Europe, consisting of the countries England, Scotland, and Wales. With an area of , it is the largest of the British Isles, the List of European ...
to its east by the
North Channel, the
Irish Sea
The Irish Sea is a body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Ch ...
, and
St George's Channel. Ireland is the
second-largest island of the
British Isles
The British Isles are an archipelago in the Atlantic Ocean, North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner Hebrides, Inner and Outer Hebr ...
, the
third-largest in Europe, and the
twentieth-largest in the world.
As of 2022, the
population of the entire island is just over 7 million, with 5.1 million in the Republic of Ireland and 1.9 million in Northern Ireland, ranking it the
second-most populous island in Europe after Great Britain.
[The 2022 population of the Republic of Ireland was 5,123,536 and that of Northern Ireland in 2021 was 1,903,100. These are Census data from the official governmental statistics agencies in the respective jurisdictions:
*
* ]
The
geography of Ireland comprises relatively low-lying mountains surrounding a central plain, with
several navigable rivers extending inland. Its lush vegetation is a product of its mild but changeable climate which is free of extremes in temperature. Much of Ireland was woodland until the end of the
Middle Ages
In the history of Europe, the Middle Ages or medieval period lasted approximately from the 5th to the late 15th centuries, similarly to the post-classical period of global history. It began with the fall of the Western Roman Empire and ...
. Today, woodland makes up about 10% of the island, compared with a European average of over 33%,
with most of it being non-native conifer plantations.
["Native trees cover just 2% of Ireland. How can this be increased?"]
. ''The Irish Times
''The Irish Times'' is an Irish daily broadsheet newspaper and online digital publication. It was launched on 29 March 1859. The editor is Ruadhán Mac Cormaic. It is published every day except Sundays. ''The Irish Times'' is Ireland's leading n ...
'', 6 July 2018. Retrieved 29 January 2019.["Ireland's native woodlands are quietly disappearing"]
. ''The Irish Times
''The Irish Times'' is an Irish daily broadsheet newspaper and online digital publication. It was launched on 29 March 1859. The editor is Ruadhán Mac Cormaic. It is published every day except Sundays. ''The Irish Times'' is Ireland's leading n ...
'', 19 June 2018. Retrieved 29 January 2019. The
Irish climate is influenced by the Atlantic Ocean and thus very moderate, and winters are milder than expected for such a northerly area, although summers are cooler than those in continental Europe. Rainfall and cloud cover are abundant.
Gaelic Ireland
Gaelic Ireland () was the Gaelic political and social order, and associated culture, that existed in Ireland from the late Prehistory of Ireland, prehistoric era until the 17th century. It comprised the whole island before Anglo-Norman invasi ...
had emerged by the 1st century AD. The island was
Christianised from the 5th century onwards. During this period Ireland was divided amongst petty kings, who in turn served under the kings of the
traditional provinces (; ) vying for dominance and the title of
High King of Ireland
High King of Ireland ( ) was a royal title in Gaelic Ireland held by those who had, or who are claimed to have had, lordship over all of Ireland. The title was held by historical kings and was later sometimes assigned anachronously or to leg ...
. Between the late 8th and early 11th centuries,
Viking
Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden),
who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...
raids and settlement took place culminating in the
Battle of Clontarf on 23 April 1014 which resulted in the ending of Viking power in Ireland. Following the 12th-century
Anglo-Norman invasion,
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
claimed sovereignty. However, English rule did not extend over the whole island until the 16th–17th century
Tudor conquest, which led to
colonisation by settlers from Britain. In the 1690s, a system of
Protestant English rule was designed to materially disadvantage the
Catholic
The Catholic Church (), also known as the Roman Catholic Church, is the List of Christian denominations by number of members, largest Christian church, with 1.27 to 1.41 billion baptized Catholics Catholic Church by country, worldwid ...
majority and Protestant
dissenters, and was extended during the 18th century. With the
Acts of Union in 1801, Ireland became
a part of the
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
. A
war of independence
Wars of national liberation, also called wars of independence or wars of liberation, are conflicts fought by nations to gain independence. The term is used in conjunction with wars against foreign powers (or at least those perceived as foreign) ...
in the early 20th century was followed by the
partition of the island, leading to the creation of the
Irish Free State
The Irish Free State (6 December 192229 December 1937), also known by its Irish-language, Irish name ( , ), was a State (polity), state established in December 1922 under the Anglo-Irish Treaty of December 1921. The treaty ended the three-ye ...
, which became increasingly sovereign over the following decades until it declared a republic in 1948 (Republic of Ireland Act, 1948) and Northern Ireland, which remained a part of the United Kingdom. Northern Ireland saw much
civil unrest from the late 1960s until the 1990s. This subsided following the
Good Friday Agreement in 1998. In 1973, both the Republic of Ireland and the United Kingdom, with Northern Ireland as part of it, joined the
European Economic Community
The European Economic Community (EEC) was a regional organisation created by the Treaty of Rome of 1957,Today the largely rewritten treaty continues in force as the ''Treaty on the functioning of the European Union'', as renamed by the Lisbo ...
. Following a referendum vote in 2016, the United Kingdom, Northern Ireland included, left the
European Union
The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
(EU) in 2020. Northern Ireland was granted a limited special status and allowed to operate within the EU single market for goods without being in the European Union.
Irish culture has had a significant influence on other cultures, especially in the field of
literature
Literature is any collection of Writing, written work, but it is also used more narrowly for writings specifically considered to be an art form, especially novels, Play (theatre), plays, and poetry, poems. It includes both print and Electroni ...
. Alongside mainstream
Western culture
Western culture, also known as Western civilization, European civilization, Occidental culture, Western society, or simply the West, refers to the Cultural heritage, internally diverse culture of the Western world. The term "Western" encompas ...
, a strong indigenous culture exists, as expressed through
Gaelic games
Gaelic games () are a set of sports played worldwide, though they are particularly popular in Ireland, where they originated. They include Gaelic football, hurling, Gaelic handball and rounders. Football and hurling, the most popular of the s ...
,
Irish music,
Irish language
Irish (Standard Irish: ), also known as Irish Gaelic or simply Gaelic ( ), is a Celtic language of the Indo-European language family. It is a member of the Goidelic languages of the Insular Celtic sub branch of the family and is indigenous ...
, and
Irish dance. The island's culture shares many features with that of Great Britain, including the English language, and sports such as
association football
Association football, more commonly known as football or soccer, is a team sport played between two teams of 11 Football player, players who almost exclusively use their feet to propel a Ball (association football), ball around a rectangular f ...
,
rugby,
horse racing
Horse racing is an equestrian performance activity, typically involving two or more horses ridden by jockeys (or sometimes driven without riders) over a set distance for competition. It is one of the most ancient of all sports, as its bas ...
,
golf
Golf is a club-and-ball sport in which players use various Golf club, clubs to hit a Golf ball, ball into a series of holes on a golf course, course in as few strokes as possible.
Golf, unlike most ball games, cannot and does not use a standa ...
, and
boxing
Boxing is a combat sport and martial art. Taking place in a boxing ring, it involves two people – usually wearing protective equipment, such as boxing glove, protective gloves, hand wraps, and mouthguards – throwing Punch (combat), punch ...
.
Name
The names ''Ireland'' and derive from
Old Irish
Old Irish, also called Old Gaelic (, Ogham, Ogham script: ᚌᚑᚔᚇᚓᚂᚉ; ; ; or ), is the oldest form of the Goidelic languages, Goidelic/Gaelic language for which there are extensive written texts. It was used from 600 to 900. The ...
''
Ériu
In Irish mythology, Ériu (; ), daughter of Delbáeth and Ernmas of the Tuatha Dé Danann, was the eponymous matron goddess of Ireland.
The English name for Ireland comes from the name Ériu and the Germanic languages, Germanic (Old Norse or ...
'', a goddess in
Irish mythology
Irish mythology is the body of myths indigenous to the island of Ireland. It was originally Oral tradition, passed down orally in the Prehistoric Ireland, prehistoric era. In the History of Ireland (795–1169), early medieval era, myths were ...
first recorded in the ninth century. The etymology of Ériu is disputed but may derive from the
Proto-Indo-European
Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family. No direct record of Proto-Indo-European exists; its proposed features have been derived by linguistic reconstruction from documented Indo-Euro ...
root *', referring to flowing water.
History
Prehistoric Ireland
During the
last glacial period, and until about 16,000 BC, much of Ireland was periodically covered in ice.
The
relative sea level was less than 50m lower resulting in an
ice bridge (but not a
land bridge
In biogeography, a land bridge is an isthmus or wider land connection between otherwise separate areas, over which animals and plants are able to cross and colonize new lands. A land bridge can be created by marine regression, in which sea le ...
) forming between Ireland and Great Britain.
By 14,000 BC this ice bridge existed only between Northern Ireland and Scotland and by 12,000 BC Ireland was completely separated from Great Britain.
[Edwards, Robin & al.]
The Island of Ireland: Drowning the Myth of an Irish Land-bridge?
" Accessed 15 February 2013. Later, around 6,100 BC, Great Britain became separated from continental Europe. Until recently, the earliest evidence of human activity in Ireland was dated at 12,500 years ago, demonstrated by a butchered bear bone found in a cave in
County Clare
County Clare () is a Counties of Ireland, county in the Provinces of Ireland, province of Munster in the Southern Region, Ireland, Southern part of Republic of Ireland, Ireland, bordered on the west by the Atlantic Ocean. Clare County Council ...
.
Since 2021, the earliest evidence of human activity in Ireland is dated to 33,000 years ago.
By about 8,000 BC, more sustained occupation of the island has been shown, with evidence for
Mesolithic
The Mesolithic (Ancient Greek language, Greek: μÎσος, ''mesos'' 'middle' + λίθος, ''lithos'' 'stone') or Middle Stone Age is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic i ...
communities around the island.
Some time before 4,000 BC,
Neolithic
The Neolithic or New Stone Age (from Ancient Greek, Greek 'new' and 'stone') is an archaeological period, the final division of the Stone Age in Mesopotamia, Asia, Europe and Africa (c. 10,000 BCE to c. 2,000 BCE). It saw the Neolithic Revo ...
settlers
A settler or a colonist is a person who establishes or joins a permanent presence that is separate to existing communities. The entity that a settler establishes is a Human settlement, settlement. A settler is called a pioneer if they are among ...
introduced cereal
cultivar
A cultivar is a kind of Horticulture, cultivated plant that people have selected for desired phenotypic trait, traits and which retains those traits when Plant propagation, propagated. Methods used to propagate cultivars include division, root a ...
s, domesticated animals such as cattle and sheep, built large timber buildings, and stone monuments.
The earliest evidence for farming in Ireland or Great Britain is from
Ferriter's Cove,
County Kerry
County Kerry () is a Counties of Ireland, county on the southwest coast of Republic of Ireland, Ireland, within the Provinces of Ireland, province of Munster and the Southern Region, Ireland, Southern Region. It is bordered by two other countie ...
, where a flint knife, cattle bones and a sheep's tooth were
carbon-dated to .
Field systems were developed in different parts of Ireland, including at the , that has been preserved beneath a blanket of peat in present-day
Tyrawley. An extensive
field system, arguably the oldest in the world, consisted of small divisions separated by
dry-stone walls. The fields were farmed for several centuries between 3,500 BC and 3,000 BC.
Wheat
Wheat is a group of wild and crop domestication, domesticated Poaceae, grasses of the genus ''Triticum'' (). They are Agriculture, cultivated for their cereal grains, which are staple foods around the world. Well-known Taxonomy of wheat, whe ...
and
barley
Barley (), a member of the grass family, is a major cereal grain grown in temperate climates globally. It was one of the first cultivated grains; it was domesticated in the Fertile Crescent around 9000 BC, giving it nonshattering spikele ...
were the principal crops.
The
Bronze Age
The Bronze Age () was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of ...
began around 2,500 BC, with technology changing people's everyday lives during this period through innovations such as the wheel, harnessing
oxen
An ox (: oxen), also known as a bullock (in BrE, British, AusE, Australian, and IndE, Indian English), is a large bovine, trained and used as a draft animal. Oxen are commonly castration, castrated adult male cattle, because castration i ...
,
weaving textiles, brewing
alcohol
Alcohol may refer to:
Common uses
* Alcohol (chemistry), a class of compounds
* Ethanol, one of several alcohols, commonly known as alcohol in everyday life
** Alcohol (drug), intoxicant found in alcoholic beverages
** Alcoholic beverage, an alco ...
and
metalworking
Metalworking is the process of shaping and reshaping metals in order to create useful objects, parts, assemblies, and large scale structures. As a term, it covers a wide and diverse range of processes, skills, and tools for producing objects on e ...
,
which produced new weapons and tools, along with fine gold decoration and jewellery, such as
brooches and
torc
A torc, also spelled torq or torque, is a large rigid or stiff neck ring in metal, made either as a single piece or from strands twisted together. The great majority are open at the front, although some have hook and ring closures and a few hav ...
s.
Emergence of Celtic Ireland
How and when the island became Celtic has been debated for close to a century, with the migrations of the Celts being one of the more enduring themes of archaeological and linguistic studies. The most recent genetic research strongly associates the spread of
Indo-European languages
The Indo-European languages are a language family native to the northern Indian subcontinent, most of Europe, and the Iranian plateau with additional native branches found in regions such as Sri Lanka, the Maldives, parts of Central Asia (e. ...
(including Celtic) through Western Europe with a people bringing a composite
Beaker culture
The Bell Beaker culture, also known as the Bell Beaker complex or Bell Beaker phenomenon, is an archaeological culture named after the inverted-bell Beaker (archaeology), beaker drinking vessel used at the beginning of the European Bronze Age, ...
, with its arrival in Britain and Ireland dated to around the middle of the third millennium BC.
According to
John T. Koch and others, Ireland in the Late Bronze Age was part of a maritime trading-network culture called the
Atlantic Bronze Age that also included Britain, western France and Iberia, and that this is where
Celtic languages
The Celtic languages ( ) are a branch of the Indo-European language family, descended from the hypothetical Proto-Celtic language. The term "Celtic" was first used to describe this language group by Edward Lhuyd in 1707, following Paul-Yve ...
developed.
This contrasts with the traditional view that their origin lies in mainland Europe with the
Hallstatt culture
The Hallstatt culture was the predominant Western Europe, Western and Central European archaeological culture of the Late Bronze Age Europe, Bronze Age (Hallstatt A, Hallstatt B) from the 12th to 8th centuries BC and Early Iron Age Europe (Hallst ...
.

The long-standing traditional view is that the Celtic language,
Ogham script and culture were brought to Ireland by waves of invading or migrating
Celts
The Celts ( , see Names of the Celts#Pronunciation, pronunciation for different usages) or Celtic peoples ( ) were a collection of Indo-European languages, Indo-European peoples. "The Celts, an ancient Indo-European people, reached the apoge ...
from mainland Europe. This theory draws on the ''
Lebor Gabála Érenn
''Lebor Gabála Érenn'' (literally "The Book of Ireland's Taking"; Modern Irish spelling: ''Leabhar Gabhála Éireann'', known in English as ''The Book of Invasions'') is a collection of poems and prose narratives in the Irish language inten ...
'', a medieval Christian pseudo-history of Ireland, along with the presence of Celtic culture, language and artefacts found in Ireland such as Celtic bronze spears, shields, torcs and other finely crafted Celtic associated possessions. The theory holds that there were four separate Celtic invasions of Ireland. The
Priteni were said to be the first, followed by the
Belgae
The Belgae ( , ) were a large confederation of tribes living in northern Gaul, between the English Channel, the west bank of the Rhine, and the northern bank of the river Seine, from at least the third century BC. They were discussed in depth b ...
from northern Gaul and Britain. Later, Laighin tribes from Armorica (present-day Brittany) were said to have invaded Ireland and Britain more or less simultaneously. Lastly, the
Milesians (
Gaels
The Gaels ( ; ; ; ) are an Insular Celts, Insular Celtic ethnolinguistic group native to Ireland, Scotland, and the Isle of Man. They are associated with the Goidelic languages, Gaelic languages: a branch of the Celtic languages comprising ...
) were said to have reached Ireland from either northern Iberia or southern Gaul. It was claimed that a second wave named the Euerni, belonging to the Belgae people of northern Gaul, began arriving about the sixth century BC. They were said to have given their name to the island.
The theory was advanced in part because of the lack of archaeological evidence for large-scale Celtic immigration, though it is accepted that such movements are notoriously difficult to identify. Historical linguists are skeptical that this method alone could account for the absorption of Celtic language, with some saying that an assumed processual view of Celtic linguistic formation is 'an especially hazardous exercise'. Genetic lineage investigation into the area of Celtic migration to Ireland has led to findings that showed no significant differences in
mitochondrial DNA
Mitochondrial DNA (mtDNA and mDNA) is the DNA located in the mitochondrion, mitochondria organelles in a eukaryotic cell that converts chemical energy from food into adenosine triphosphate (ATP). Mitochondrial DNA is a small portion of the D ...
between Ireland and large areas of continental Europe, in contrast to parts of the Y-chromosome pattern. When taking both into account, a study concluded that modern Celtic speakers in Ireland could be thought of as European "Atlantic Celts" showing a shared ancestry throughout the Atlantic zone from northern Iberia to western Scandinavia rather than substantially central European.
In 2012, research showed that the occurrence of genetic markers for the earliest farmers was almost eliminated by Beaker-culture immigrants: they carried what was then a new Y-chromosome R1b marker, believed to have originated in Iberia about 2,500 BC. The prevalence amongst modern Irish men of this mutation is a remarkable 84%, the highest in the world, and closely matched in other populations along the Atlantic fringes down to Spain. A similar genetic replacement happened with lineages in mitochondrial DNA.
This conclusion is supported by recent research carried out by the geneticist
David Reich, who says: "British and Irish skeletons from the Bronze Age that followed the Beaker period had at most 10 per cent ancestry from the first farmers of these islands, with other 90 per cent from people like those associated with the Bell Beaker culture in the Netherlands." He suggests that it was Beaker users who introduced an Indo-European language, represented here by Celtic (i.e. a new language and culture introduced directly by migration and genetic replacement).
Late antiquity and early medieval times

The earliest written records of Ireland come from classical
Greco-Roman geographers.
Ptolemy
Claudius Ptolemy (; , ; ; – 160s/170s AD) was a Greco-Roman mathematician, astronomer, astrologer, geographer, and music theorist who wrote about a dozen scientific treatises, three of which were important to later Byzantine science, Byzant ...
in his ''
Almagest'' refers to Ireland as ''Mikra Brettania'' ("Little Britain"), in contrast to the larger island, which he called ''Megale Brettania'' ("Great Britain"). In
his map of Ireland in his later work, ''
Geography
Geography (from Ancient Greek ; combining 'Earth' and 'write', literally 'Earth writing') is the study of the lands, features, inhabitants, and phenomena of Earth. Geography is an all-encompassing discipline that seeks an understanding o ...
'', Ptolemy refers to Ireland as ''
Iouernia'' and to Great Britain as ''Albion''. These 'new' names were likely to have been the local names for the islands at the time. The earlier names,
in contrast, were likely to have been coined before direct contact with local peoples was made.
The
Romans referred to Ireland by this name too in its
Latinised form, ''Hibernia'', or
Scotia. Ptolemy records 16 nations inhabiting every part of Ireland in 100 AD. The relationship between the Roman Empire and the kingdoms of ancient Ireland is unclear. However, a number of finds of Roman coins have been made, for example at the Iron Age settlement of Freestone Hill near
Gowran
Gowran (; ) is a town on the eastern side of County Kilkenny, Ireland. The historic St. Mary's Collegiate Church is in the centre of Gowran, close to Gowran Castle. Gowran Park race course and Golf Course are one kilometre from the centre of ...
and
Newgrange
Newgrange () is a prehistoric monument in County Meath in Ireland, placed on a rise overlooking the River Boyne, west of the town of Drogheda. It is an exceptionally grand passage tomb built during the Neolithic Period, around 3100 BC, makin ...
.
Ireland continued as a patchwork of rival kingdoms; however, beginning in the 7th century, a concept of national kingship gradually became articulated through the concept of a
High King of Ireland
High King of Ireland ( ) was a royal title in Gaelic Ireland held by those who had, or who are claimed to have had, lordship over all of Ireland. The title was held by historical kings and was later sometimes assigned anachronously or to leg ...
.
Medieval Irish literature portrays an almost unbroken sequence of high kings stretching back thousands of years, but some modern historians believe the scheme was constructed in the 8th century to justify the status of powerful political groupings by projecting the origins of their rule into the remote past.
[, "Ireland, 400–800", in (ed.), ''A New History of Ireland 1: Prehistoric and Early Ireland'', Oxford University Press, 2005, pp. 182–234.]
All of the Irish kingdoms had their own kings but were nominally subject to the high king. The high king was drawn from the ranks of the provincial kings and ruled also the royal
kingdom of Meath
Meath ( ; ; ) was a kingdom in Ireland from the 1st to the 12th century AD. Its name means "middle," denoting its location in the middle of the island.
At its greatest extent, it included all of County Meath (which takes its name from the k ...
, with a ceremonial capital at the
Hill of Tara
The Hill of Tara ( or ) is a hill and ancient ceremonial and burial site near Skryne in County Meath, Ireland. Tradition identifies the hill as the inauguration place and seat of the High Kings of Ireland; it also appears in Irish mythology. ...
. The concept did not become a political reality until the
Viking Age
The Viking Age (about ) was the period during the Middle Ages when Norsemen known as Vikings undertook large-scale raiding, colonising, conquest, and trading throughout Europe and reached North America. The Viking Age applies not only to their ...
and even then was not a consistent one. Ireland did have a culturally unifying rule of law: the early written judicial system, the
Brehon Laws
Early Irish law, also called Brehon law (from the old Irish word breithim meaning judge), comprised the statutes which governed everyday life in Early Medieval Ireland. They were partially eclipsed by the Norman invasion of 1169, but underwe ...
, administered by a professional class of jurists known as the ''brehons''.
''
The Chronicle of Ireland'' records that in 431, Bishop
Palladius arrived in Ireland on a mission from
Pope Celestine I to minister to the Irish "already believing in Christ". The same chronicle records that
Saint Patrick, Ireland's best known
patron saint
A patron saint, patroness saint, patron hallow or heavenly protector is a saint who in Catholicism, Anglicanism, Eastern Orthodoxy or Oriental Orthodoxy is regarded as the heavenly advocate of a nation, place, craft, activity, class, clan, fa ...
, arrived the following year. There is continued debate over the missions of Palladius and Patrick, but the consensus is that they both took place and that the older
druid tradition collapsed in the face of the new religion.
Irish Christian scholars excelled in the study of Latin and Greek learning and Christian theology. In the monastic culture that followed the Christianisation of Ireland, Latin and Greek learning was preserved in Ireland during the
Early Middle Ages
The Early Middle Ages (or early medieval period), sometimes controversially referred to as the Dark Ages (historiography), Dark Ages, is typically regarded by historians as lasting from the late 5th to the 10th century. They marked the start o ...
in contrast to elsewhere in Western Europe, where the
Dark Ages followed the
Fall of the Western Roman Empire
The fall of the Western Roman Empire, also called the fall of the Roman Empire or the fall of Rome, was the loss of central political control in the Western Roman Empire, a process in which the Empire failed to enforce its rule, and its vast ...
.

The arts of
manuscript illumination
An illuminated manuscript is a formally prepared document where the text is decorated with flourishes such as borders and miniature illustrations. Often used in the Roman Catholic Church for prayers and liturgical books such as psalters and ...
, metalworking and sculpture flourished and produced treasures such as the ''
Book of Kells
The Book of Kells (; ; Dublin, Trinity College Library, MS A. I. 8 sometimes known as the Book of Columba) is an illustrated manuscript and Celts, Celtic Gospel book in Latin, containing the Gospel, four Gospels of the New Testament togeth ...
'', ornate jewellery and the many carved stone crosses that still dot the island today. A mission founded in 563 on
Iona by the Irish monk Saint
Columba
Columba () or Colmcille (7 December 521 – 9 June 597 AD) was an Irish abbot and missionary evangelist credited with spreading Christianity in what is today Scotland at the start of the Hiberno-Scottish mission. He founded the important abbey ...
began
a tradition of Irish missionary work that spread
Celtic Christianity
Celtic Christianity is a form of Christianity that was common, or held to be common, across the Celtic languages, Celtic-speaking world during the Early Middle Ages. The term Celtic Church is deprecated by many historians as it implies a unifi ...
and learning to
Scotland
Scotland is a Countries of the United Kingdom, country that is part of the United Kingdom. It contains nearly one-third of the United Kingdom's land area, consisting of the northern part of the island of Great Britain and more than 790 adjac ...
,
England
England is a Countries of the United Kingdom, country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and List of islands of England, more than 100 smaller adjacent islands. It ...
and the
Frankish Empire on continental Europe after the fall of Rome. These missions continued until the
late Middle Ages
The late Middle Ages or late medieval period was the Periodization, period of History of Europe, European history lasting from 1300 to 1500 AD. The late Middle Ages followed the High Middle Ages and preceded the onset of the early modern period ( ...
, establishing monasteries and centres of learning, producing scholars such as
Sedulius Scottus and
Johannes Eriugena and exerting much influence in Europe.
From the 9th century, waves of
Viking
Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden),
who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...
raiders plundered Irish monasteries and towns. These raids added to a pattern of raiding and
endemic warfare
__NOTOC__
Ritual warfare (sometimes called endemic warfare) is a state of continual or frequent warfare, such as is found in (but not limited to) some tribe, tribal societies.
Description
Ritual fighting (or ritual battle or ritual warfare) pe ...
that was already deep-seated in Ireland. The Vikings were involved in establishing most of the major coastal settlements in Ireland:
Dublin
Dublin is the capital and largest city of Republic of Ireland, Ireland. Situated on Dublin Bay at the mouth of the River Liffey, it is in the Provinces of Ireland, province of Leinster, and is bordered on the south by the Dublin Mountains, pa ...
,
Limerick
Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
,
Cork,
Wexford
Wexford ( ; archaic Yola dialect, Yola: ''Weiseforthe'') is the county town of County Wexford, Republic of Ireland, Ireland. Wexford lies on the south side of Wexford Harbour, the estuary of the River Slaney near the southeastern corner of the ...
,
Waterford
Waterford ( ) is a City status in Ireland, city in County Waterford in the South-East Region, Ireland, south-east of Ireland. It is located within the Provinces of Ireland, province of Munster. The city is situated at the head of Waterford H ...
, as well as other smaller settlements.
Norman and English invasions

On 1 May 1169, an expedition of
Cambro-Norman knights, with an army of about 600 men, landed at
Bannow Strand in present-day
County Wexford
County Wexford () is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Leinster and is part of the Southern Region, Ireland, Southern Region. Named after the town of Wexford, it was ba ...
. It was led by
Richard de Clare, known as 'Strongbow' owing to his prowess as an archer. The invasion, which coincided with a period of renewed Norman expansion, was at the invitation of
Dermot Mac Murrough,
King of Leinster.
In 1166, Mac Murrough had fled to
Anjou, France, following a war involving
Tighearnán Ua Ruairc, of
Breifne, and sought the assistance of the
Angevin King
Henry II, in recapturing his kingdom. In 1171, Henry arrived in Ireland in order to review the general progress of the expedition. He wanted to re-exert royal authority over the invasion which was expanding beyond his control. Henry successfully re-imposed his authority over Strongbow and the Cambro-Norman warlords and persuaded many of the Irish kings to accept him as their overlord, an arrangement confirmed in the 1175
Treaty of Windsor.
The invasion was legitimised by reference to provisions of the alleged
Papal Bull
A papal bull is a type of public decree, letters patent, or charter issued by the pope of the Catholic Church. It is named after the leaden Seal (emblem), seal (''bulla (seal), bulla'') traditionally appended to authenticate it.
History
Papal ...
''
Laudabiliter'', issued by an Englishman,
Adrian IV, in 1155. The document apparently encouraged Henry to take control in Ireland in order to oversee the financial and administrative reorganisation of the
Irish Church and its integration into the Roman Church system.
Some restructuring had already begun at the ecclesiastical level following the
Synod of Kells
The Synod of Kells (, ) took place in 1152, under the presidency of Giovanni Cardinal Paparoni, and continued the process begun at the Synod of Ráth Breasail (1111) of reforming the Irish church. The sessions were divided between the abbeys o ...
in 1152. There has been significant controversy regarding the authenticity of ''Laudabiliter'', and there is no general agreement as to whether the bull was genuine or a forgery. Further, it had no standing in the Irish legal system.

In 1172, Pope
Alexander III further encouraged Henry to advance the integration of the Irish Church with Rome. Henry was authorised to impose a tithe of one penny per hearth as an annual contribution. This church levy, called
Peter's Pence, is extant in Ireland as a voluntary donation. In turn, Henry assumed the title of
Lord of Ireland
The Lordship of Ireland (), sometimes referred to retrospectively as Anglo-Norman Ireland, was the part of Ireland ruled by the King of Kingdom of England, England (styled as "Lord of Ireland") and controlled by loyal Normans in Ireland, Anglo ...
which Henry conferred on his younger son,
John Lackland, in 1185. This defined the Anglo-Norman administration in Ireland as the
Lordship of Ireland. When Henry's successor died unexpectedly in 1199,
John inherited the crown of England and retained the Lordship of Ireland. Over the century that followed, Norman feudal law gradually replaced the Gaelic Brehon Law across large areas, so that by the late 13th century the
Norman-Irish had established a feudal system throughout much of Ireland. Norman settlements were characterised by the establishment of baronies, manors, towns and the seeds of the modern county system. A version of
Magna Carta
(Medieval Latin for "Great Charter"), sometimes spelled Magna Charta, is a royal charter of rights agreed to by King John of England at Runnymede, near Windsor, on 15 June 1215. First drafted by the Archbishop of Canterbury, Cardin ...
(the
Great Charter of Ireland), substituting ''Dublin'' for ''London'' and the ''Irish Church'' for, the English church at the time, the ''Catholic Church'', was published in 1216 and the
Parliament of Ireland
The Parliament of Ireland () was the legislature of the Lordship of Ireland, and later the Kingdom of Ireland, from 1297 until the end of 1800. It was modelled on the Parliament of England and from 1537 comprised two chambers: the Irish Hou ...
was founded in 1297.
Gaelicisation
From the mid-14th century, after the
Black Death
The Black Death was a bubonic plague pandemic that occurred in Europe from 1346 to 1353. It was one of the list of epidemics, most fatal pandemics in human history; as many as people perished, perhaps 50% of Europe's 14th century population. ...
, Norman settlements in Ireland went into a period of decline. The Norman rulers and the Gaelic Irish elites intermarried and the areas under Norman rule became
Gaelicised
Gaelicisation, or Gaelicization, is the act or process of making something Gaels, Gaelic or gaining characteristics of the ''Gaels'', a sub-branch of Celticisation. The Gaels are an ethno-linguistic group, traditionally viewed as having spread fro ...
. In some parts, a hybrid Hiberno-Norman culture emerged. In response, the
Irish parliament passed the
Statutes of Kilkenny
The Statutes of Kilkenny were a series of thirty-five acts enacted by the Parliament of Ireland at Kilkenny in 1366, aiming to curb the decline of the Hiberno-Norman Lordship of Ireland.
Background to the statutes
By the middle decades of the ...
in 1367. These were a set of laws designed to prevent the assimilation of the Normans into Irish society by requiring English subjects in Ireland to speak English, follow English customs and abide by English law.
By the end of the 15th century, central English authority in Ireland had all but disappeared, and a renewed Irish culture and language, albeit with Norman influences, was again dominant. English Crown control remained relatively unshaken in an amorphous foothold around Dublin known as
The Pale, and under the provisions of
Poynings' Law of 1494, Irish Parliamentary legislation was subject to the approval of the
English Privy Council.
Kingdom of Ireland
The title of
King of Ireland was re-created in 1542 by
Henry VIII
Henry VIII (28 June 149128 January 1547) was King of England from 22 April 1509 until his death in 1547. Henry is known for his Wives of Henry VIII, six marriages and his efforts to have his first marriage (to Catherine of Aragon) annulled. ...
, the then
King of England
The monarchy of the United Kingdom, commonly referred to as the British monarchy, is the form of government used by the United Kingdom by which a hereditary monarch reigns as the head of state, with their powers Constitutional monarchy, regula ...
, of the
Tudor dynasty
The House of Tudor ( ) was an English and Welsh dynasty that held the throne of England from 1485 to 1603. They descended from the Tudors of Penmynydd, a Welsh noble family, and Catherine of Valois. The Tudor monarchs ruled the Kingdom of Eng ...
. English rule was reinforced and expanded in Ireland during the latter part of the 16th century, leading to the
Tudor conquest of Ireland
Ireland was conquered by the Tudor monarchs of England in the 16th century. The Anglo-Normans had Anglo-Norman invasion of Ireland, conquered swathes of Ireland in the late 12th century, bringing it under Lordship of Ireland, English rule. In t ...
. A near-complete conquest was achieved by the turn of the 17th century, following the
Nine Years' War
The Nine Years' War was a European great power conflict from 1688 to 1697 between Kingdom of France, France and the Grand Alliance (League of Augsburg), Grand Alliance. Although largely concentrated in Europe, fighting spread to colonial poss ...
and the
.
This control was consolidated during the wars and conflicts of the 17th century, including the English and Scottish colonisation in the
Plantations of Ireland, the
Wars of the Three Kingdoms
The Wars of the Three Kingdoms were a series of conflicts fought between 1639 and 1653 in the kingdoms of Kingdom of England, England, Kingdom of Scotland, Scotland and Kingdom of Ireland, Ireland, then separate entities in a personal union un ...
and the
Williamite War. Irish losses during the Wars of the Three Kingdoms (which, in Ireland, included the
Irish Confederacy and the
Cromwellian conquest of Ireland) are estimated to include 20,000 battlefield casualties. 200,000 civilians are estimated to have died as a result of a combination of war-related famine, displacement, guerrilla activity and pestilence throughout the war. A further 50,000 were sent into
indentured servitude
Indentured servitude is a form of labor in which a person is contracted to work without salary for a specific number of years. The contract called an " indenture", may be entered voluntarily for a prepaid lump sum, as payment for some good or s ...
in the
West Indies
The West Indies is an island subregion of the Americas, surrounded by the Atlantic Ocean, North Atlantic Ocean and the Caribbean Sea, which comprises 13 independent island country, island countries and 19 dependent territory, dependencies in thr ...
. Physician-general
William Petty
Sir William Petty (26 May 1623 – 16 December 1687) was an English economist, physician, scientist and philosopher. He first became prominent serving Oliver Cromwell and the Commonwealth of England, Commonwealth in Cromwellian conquest of I ...
estimated that 504,000 Catholic Irish and 112,000 Protestant settlers died, and 100,000 people were transported, as a result of the war. If a prewar population of 1.5 million is assumed, this would mean that the population was reduced by almost half.
The religious struggles of the 17th century left a deep sectarian division in Ireland. Religious allegiance now determined the perception in law of loyalty to the Irish King and Parliament. After the passing of
the Test Act 1672, and the victory of the forces of the dual monarchy of
William
William is a masculine given name of Germanic languages, Germanic origin. It became popular in England after the Norman Conquest, Norman conquest in 1066,All Things William"Meaning & Origin of the Name"/ref> and remained so throughout the Middle ...
and
Mary over the
Jacobites, Roman Catholics and nonconforming Protestant Dissenters were barred from sitting as members in the Irish Parliament. Under the emerging
Penal Laws, Irish Roman Catholics and Dissenters were increasingly deprived of various civil rights, even the ownership of hereditary property. Additional regressive punitive legislation followed in 1703, 1709 and 1728. This completed a comprehensive systemic effort to materially disadvantage Roman Catholics and Protestant Dissenters while enriching a new ruling class of Anglican conformists. The new Anglo-Irish ruling class became known as the
Protestant Ascendancy.

The "
Great Frost" struck Ireland and the rest of Europe between December 1739 and September 1741, after a decade of relatively mild winters. The winters destroyed stored crops of potatoes and other staples, and the poor summers severely damaged harvests. This resulted in the
famine of 1740. An estimated 250,000 people (about one in eight of the population) died from the ensuing pestilence and disease.
The Irish government halted export of corn and kept the army in quarters but did little more.
Local gentry and charitable organisations provided relief but could do little to prevent the ensuing mortality.
In the aftermath of the famine, an increase in industrial production and a surge in trade brought a succession of construction booms. The population soared in the latter part of this century and the
architectural legacy of Georgian Ireland was built. In 1782,
Poynings' Law was repealed, giving Ireland legislative independence from Great Britain for the first time since 1495. The British government, however, still retained the right to nominate the government of Ireland without the consent of the Irish parliament.
1798 Rebellion
In 1798, members of the Protestant Dissenter tradition (mainly
Presbyterian
Presbyterianism is a historically Reformed Protestant tradition named for its form of church government by representative assemblies of elders, known as "presbyters". Though other Reformed churches are structurally similar, the word ''Pr ...
) made common cause with Roman Catholics in a republican rebellion inspired and led by the
Society of United Irishmen, with the aim of creating an independent Ireland. Despite assistance from France the
rebellion
Rebellion is an uprising that resists and is organized against one's government. A rebel is a person who engages in a rebellion. A rebel group is a consciously coordinated group that seeks to gain political control over an entire state or a ...
was put down by British and Irish government and yeomanry forces. The rebellion lasted from the 24th of May to the 12th of October that year and saw the establishment of the short lived
Irish Republic (1798) in the province of
Connacht
Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uà Fiachrach, Uà Briúin, Uà Maine, C ...
. It saw numerous battles across the island with an estimated 30,000 people dead.
Union with Great Britain
As a direct result of the 1798 rebellion in its aftermath in 1800, the British and Irish parliaments both passed
Acts of Union that, with effect from 1 January 1801, merged the
Kingdom of Ireland
The Kingdom of Ireland (; , ) was a dependent territory of Kingdom of England, England and then of Kingdom of Great Britain, Great Britain from 1542 to the end of 1800. It was ruled by the monarchs of England and then List of British monarchs ...
and the
Kingdom of Great Britain
Great Britain, also known as the Kingdom of Great Britain, was a sovereign state in Western Europe from 1707 to the end of 1800. The state was created by the 1706 Treaty of Union and ratified by the Acts of Union 1707, which united the Kingd ...
to create a
United Kingdom of Great Britain and Ireland
The United Kingdom of Great Britain and Ireland was the union of the Kingdom of Great Britain and the Kingdom of Ireland into one sovereign state, established by the Acts of Union 1800, Acts of Union in 1801. It continued in this form until ...
.
The passage of the Act in the Irish Parliament was ultimately achieved with substantial majorities, having failed on the first attempt in 1799. According to contemporary documents and historical analysis, this was achieved through a considerable degree of bribery, with funding provided by the British Secret Service Office, and the awarding of peerages, places and honours to secure votes.
Thus, the parliament in Ireland was abolished and replaced by a
united parliament at Westminster in London, though resistance remained, as evidenced by
Robert Emmet's failed
Irish Rebellion of 1803.
Aside from the development of the
linen
Linen () is a textile made from the fibers of the flax plant.
Linen is very strong and absorbent, and it dries faster than cotton. Because of these properties, linen is comfortable to wear in hot weather and is valued for use in garments. Lin ...
industry, Ireland was largely passed over by the
Industrial Revolution
The Industrial Revolution, sometimes divided into the First Industrial Revolution and Second Industrial Revolution, was a transitional period of the global economy toward more widespread, efficient and stable manufacturing processes, succee ...
, partly because it lacked coal and iron resources and partly because of the impact of the sudden union with the structurally superior economy of England, which saw Ireland as a source of agricultural produce and capital.
The
Great Famine of 1845–1851 devastated Ireland, as in those years Ireland's population fell by one-third. More than one million people died from starvation and disease, with an additional million people emigrating during the famine, mostly to the United States and Canada. In the century that followed, an economic depression caused by the famine resulted in a further million people emigrating. By the end of the decade, half of all
immigration to the United States
Immigration to the United States has been a major source of population growth and Culture of the United States, cultural change throughout much of history of the United States, its history. As of January 2025, the United States has the la ...
was from Ireland. The period of civil unrest that followed until the end of the 19th century is referred to as the
Land War. Mass emigration became deeply entrenched and the population continued to decline until the mid-20th century. Immediately prior to the famine the population was recorded as 8.2 million by the
1841 census. The population has never returned to this level since. The population continued to fall until 1961;
County Leitrim
County Leitrim ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Connacht and is part of the Northern and Western Region. It is named after the village of Leitrim, County Leitr ...
was the final Irish county to record a population increase post-famine, in 2006.
The 19th and early 20th centuries saw the rise of modern
Irish nationalism
Irish nationalism is a nationalist political movement which, in its broadest sense, asserts that the people of Ireland should govern Ireland as a sovereign state. Since the mid-19th century, Irish nationalism has largely taken the form of cult ...
, primarily among the Roman Catholic population. The pre-eminent Irish political figure after the Union was
Daniel O'Connell. He was elected as Member of Parliament for
Ennis in a surprise result and despite being unable to take his seat
as a Roman Catholic. O'Connell spearheaded a vigorous campaign that was taken up by the Prime Minister, the Irish-born soldier and statesman, the
Duke of Wellington. Steering the
Catholic Relief Bill through Parliament, aided by future prime minister
Robert Peel, Wellington prevailed upon a reluctant
George IV
George IV (George Augustus Frederick; 12 August 1762 – 26 June 1830) was King of the United Kingdom of Great Britain and Ireland and King of Hanover from 29 January 1820 until his death in 1830. At the time of his accession to the throne, h ...
to sign the Bill and proclaim it into law.
George's father had opposed the plan of the earlier Prime Minister,
Pitt the Younger, to introduce such a bill following the Union of 1801, fearing
Catholic Emancipation to be in conflict with the
Act of Settlement 1701.
Daniel O'Connell led a subsequent campaign, for the repeal of the Act of Union, which failed. Later in the century,
Charles Stewart Parnell and others campaigned for autonomy within the Union, or "
Home Rule
Home rule is the government of a colony, dependent country, or region by its own citizens. It is thus the power of a part (administrative division) of a state or an external dependent country to exercise such of the state's powers of governan ...
". Unionists, especially those located in Ulster, were strongly opposed to Home Rule, which they thought would be dominated by Catholic interests. After several attempts to pass a Home Rule bill through parliament, it looked certain that one would finally pass in 1914. To prevent this from happening, the
Ulster Volunteers were formed in 1913 under the leadership of
Edward Carson
Edward Henry Carson, Baron Carson, Privy Council (United Kingdom), PC, Privy Council of Ireland, PC (Ire), King's Counsel, KC (9 February 1854 – 22 October 1935), from 1900 to 1921 known as Sir Edward Carson, was an Irish unionist politician ...
.
Their formation was followed in 1914 by the establishment of the
Irish Volunteers, whose aim was to ensure that the
Home Rule Bill was passed. The Act was passed but with the "temporary" exclusion of the six counties of Ulster, which later became Northern Ireland. Before it could be implemented, however, the Act was suspended for the duration of the
First World War
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting to ...
. The Irish Volunteers split into two groups. The majority, approximately 175,000 in number, under
John Redmond, took the name
National Volunteers and supported
Irish involvement in the war. A minority, approximately 13,000, retained the Irish Volunteers' name and opposed Ireland's involvement in the war.
The
Easter Rising
The Easter Rising (), also known as the Easter Rebellion, was an armed insurrection in Ireland during Easter Week in April 1916. The Rising was launched by Irish republicans against British rule in Ireland with the aim of establishing an ind ...
of 1916 was carried out by the latter group together with a smaller socialist militia, the
Irish Citizen Army. The British response, executing 15 leaders of the Rising over a period of ten days and imprisoning or interning more than a thousand people, turned the mood of the country in favour of the rebels. Support for
Irish republicanism increased further due to the ongoing war in Europe, as well as the
Conscription Crisis of 1918
The Conscription Crisis of 1918 stemmed from a move by the British government to impose conscription (military draft) in Ireland in April 1918 during the First World War. Vigorous opposition was led by trade unions, Irish nationalist parties a ...
.
The pro-independence republican party,
Sinn Féin
Sinn Féin ( ; ; ) is an Irish republican and democratic socialist political party active in both the Republic of Ireland and Northern Ireland.
The History of Sinn Féin, original Sinn Féin organisation was founded in 1905 by Arthur Griffit ...
, received overwhelming endorsement in the
general election of 1918, and in 1919 proclaimed an
Irish Republic
The Irish Republic ( or ) was a Revolutionary republic, revolutionary state that Irish Declaration of Independence, declared its independence from the United Kingdom of Great Britain and Ireland in January 1919. The Republic claimed jurisdict ...
, setting up its own parliament () and government. Simultaneously the Volunteers, which became known as the
Irish Republican Army
The Irish Republican Army (IRA) is a name used by various Resistance movement, resistance organisations in Ireland throughout the 20th and 21st centuries. Organisations by this name have been dominantly Catholic and dedicated to anti-imperiali ...
(IRA), launched a
three-year guerrilla war, which ended in a truce in July 1921 (although violence continued until June 1922, mostly in Northern Ireland).
Partition
In December 1921, the
Anglo-Irish Treaty
The 1921 Anglo-Irish Treaty (), commonly known in Ireland as The Treaty and officially the Articles of Agreement for a Treaty Between Great Britain and Ireland, was an agreement between the government of the United Kingdom of Great Britain an ...
was concluded between the British government and representatives of the
Second Dáil. It gave Ireland complete independence in its home affairs and practical independence for foreign policy, but an opt-out clause allowed
Northern Ireland
Northern Ireland ( ; ) is a Countries of the United Kingdom, part of the United Kingdom in the north-east of the island of Ireland. It has been #Descriptions, variously described as a country, province or region. Northern Ireland shares Repub ...
to remain within the United Kingdom, which it immediately exercised. Additionally, Members of the
Free State Parliament were required to swear
an oath of allegiance to the Constitution of the Irish Free State and make a statement of faithfulness to the king. Disagreements over these provisions led to a split in the nationalist movement and a subsequent
Irish Civil War
The Irish Civil War (; 28 June 1922 – 24 May 1923) was a conflict that followed the Irish War of Independence and accompanied the establishment of the Irish Free State, an entity independent from the United Kingdom but within the British Emp ...
between the new government of the
Irish Free State
The Irish Free State (6 December 192229 December 1937), also known by its Irish-language, Irish name ( , ), was a State (polity), state established in December 1922 under the Anglo-Irish Treaty of December 1921. The treaty ended the three-ye ...
and those opposed to the treaty, led by
Éamon de Valera
Éamon de Valera (; ; first registered as George de Valero; changed some time before 1901 to Edward de Valera; 14 October 1882 – 29 August 1975) was an American-born Irish statesman and political leader. He served as the 3rd President of Ire ...
. The civil war officially ended in May 1923 when de Valera issued a cease-fire order.
Independence

During its first decade, the newly formed Irish Free State was governed by the victors of the civil war. When de Valera achieved power, he took advantage of the
Statute of Westminster and
political circumstances to build upon inroads to greater sovereignty made by the previous government. The oath was abolished and in 1937 a new constitution was adopted.
This completed a process of gradual separation from the British Empire that governments had pursued since independence. However, it was not until 1949 that the state was declared, officially, to be the
Republic of Ireland
Ireland ( ), also known as the Republic of Ireland (), is a country in Northwestern Europe, north-western Europe consisting of 26 of the 32 Counties of Ireland, counties of the island of Ireland, with a population of about 5.4 million. ...
.
The state was neutral during
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, but offered
clandestine assistance to the Allies, particularly in the potential defence of Northern Ireland. Despite their country's neutrality, approximately 50,000 volunteers from independent Ireland joined the British forces during the war, four being awarded
Victoria Crosses.
The
German intelligence was also active in Ireland.
[Hull, Mark: "The Irish Interlude: German Intelligence in Ireland, 1939–1943", ''Journal of Military History'', Vol. 66, No. 3 (July 2002), pp. 695–717] Its operations ended in September 1941 when
police
The police are Law enforcement organization, a constituted body of Law enforcement officer, people empowered by a State (polity), state with the aim of Law enforcement, enforcing the law and protecting the Public order policing, public order ...
made arrests based on surveillance carried out on the key diplomatic legations in Dublin. To the authorities, counterintelligence was a fundamental line of defence. With a regular army of only slightly over seven thousand men at the start of the war, and with limited supplies of modern weapons, the state would have had great difficulty in defending itself from invasion from either side in the conflict.
Large-scale emigration marked most of the post-WWII period (particularly during the 1950s and 1980s), but beginning in 1987 the economy improved, and the 1990s saw the beginning of substantial economic growth. This period of growth became known as the
Celtic Tiger
The "Celtic Tiger" () is a term referring to the economy of the Republic of Ireland, economy of Ireland from the mid-1990s to the late 2000s, a period of rapid real economic growth fuelled by foreign direct investment. The boom was dampened by ...
.
The Republic's real GDP grew by an average of 9.6% per annum between 1995 and 1999, in which year the Republic joined the
euro
The euro (currency symbol, symbol: euro sign, €; ISO 4217, currency code: EUR) is the official currency of 20 of the Member state of the European Union, member states of the European Union. This group of states is officially known as the ...
. In 2000, it was the sixth-richest country in the world in terms of GDP per capita. Historian
R. F. Foster argues the cause was a combination of a new sense of initiative and the entry of American corporations. He concludes the chief factors were low taxation, pro-business regulatory policies, and a young, tech-savvy workforce. For many multinationals, the decision to do business in Ireland was made easier still by generous incentives from the
Industrial Development Authority. In addition
European Union
The European Union (EU) is a supranational union, supranational political union, political and economic union of Member state of the European Union, member states that are Geography of the European Union, located primarily in Europe. The u ...
membership was helpful, giving the country lucrative access to markets that it had previously reached only through the United Kingdom, and pumping huge subsidies and investment capital into the Irish economy.
Modernisation brought secularisation in its wake. The traditionally high levels of religiosity have sharply declined. Foster points to three factors: First, Irish feminism, largely imported from America with liberal stances on contraception, abortion and divorce, undermined the authority of bishops and priests. Second, the mishandling of the paedophile scandals humiliated the Church, whose bishops seemed less concerned with the victims and more concerned with covering up for errant priests. Third, prosperity brought hedonism and materialism that undercut the ideals of saintly poverty.
The
post-2008 Irish economic downturn
The post-2008 Irish economic downturn in the Republic of Ireland, coincided with a Post-2008 Irish banking crisis, series of banking scandals, followed the 1990s and 2000s Celtic Tiger period of rapid real economic growth fuelled by foreign dire ...
dramatically ended this period of boom. GDP fell by 3% in 2008 and by 7.1% in 2009, the worst year since records began (although earnings by foreign-owned businesses continued to grow). The state has since experienced deep recession, with unemployment, which doubled during 2009, remaining above 14% in 2012.
Northern Ireland
Northern Ireland resulted from the division of the United Kingdom by the
Government of Ireland Act 1920, and until 1972 was a self-governing jurisdiction within the United Kingdom with its own parliament and prime minister. Northern Ireland, as part of the United Kingdom, was not neutral during the Second World War, and
Belfast suffered four bombing raids in 1941.
Conscription
Conscription, also known as the draft in the United States and Israel, is the practice in which the compulsory enlistment in a national service, mainly a military service, is enforced by law. Conscription dates back to antiquity and it conti ...
was not extended to Northern Ireland, and roughly an equal number volunteered from Northern Ireland as volunteered from the Republic of Ireland.
Although Northern Ireland was largely spared the strife of the civil war, in the decades that followed partition there were sporadic episodes of inter-communal violence. Nationalists, mainly Roman Catholic, wanted to unite Ireland as an independent republic, whereas unionists, mainly Protestant, wanted Northern Ireland to remain in the United Kingdom. The Protestant and Catholic communities in Northern Ireland voted largely along
sectarian lines, meaning that the government of Northern Ireland (elected by
"first-past-the-post" from 1929) was controlled by the
Ulster Unionist Party
The Ulster Unionist Party (UUP) is a Unionism in Ireland, unionist political party in Northern Ireland. The party was founded as the Ulster Unionist Council in 1905, emerging from the Irish Unionist Alliance in Ulster. Under Edward Carson, it l ...
. Over time, the minority Catholic community felt increasingly alienated with further disaffection fuelled by practices such as
gerrymandering and discrimination in housing and employment.
In the late 1960s, nationalist grievances were aired publicly in mass civil rights protests, which were often confronted by
loyalist counter-protests. The government's reaction to confrontations was seen to be one-sided and heavy-handed in favour of unionists. Law and order broke down as unrest and inter-communal violence increased. The Northern Ireland government requested the
British Army
The British Army is the principal Army, land warfare force of the United Kingdom. the British Army comprises 73,847 regular full-time personnel, 4,127 Brigade of Gurkhas, Gurkhas, 25,742 Army Reserve (United Kingdom), volunteer reserve perso ...
to aid the police and protect the
Irish Nationalist
Irish nationalism is a nationalist political movement which, in its broadest sense, asserts that the people of Ireland should govern Ireland as a sovereign state. Since the mid-19th century, Irish nationalism has largely taken the form of cult ...
population. In 1969, the paramilitary
Provisional IRA
The Provisional Irish Republican Army (Provisional IRA), officially known as the Irish Republican Army (IRA; ) and informally known as the Provos, was an Irish republican paramilitary force that sought to end British rule in Northern Ireland ...
, which favoured the creation of a
united Ireland
United Ireland (), also referred to as Irish reunification or a ''New Ireland'', is the proposition that all of Ireland should be a single sovereign state. At present, the island is divided politically: the sovereign state of Ireland (legally ...
, emerged from a split in the
Irish Republican Army
The Irish Republican Army (IRA) is a name used by various Resistance movement, resistance organisations in Ireland throughout the 20th and 21st centuries. Organisations by this name have been dominantly Catholic and dedicated to anti-imperiali ...
and began a campaign against what it called the "British occupation of the six counties".
Other groups, both the unionist and nationalist participated in violence, and a period known as "
the Troubles
The Troubles () were an ethno-nationalist conflict in Northern Ireland that lasted for about 30 years from the late 1960s to 1998. Also known internationally as the Northern Ireland conflict, it began in the late 1960s and is usually deemed t ...
" began. More than 3,600 deaths resulted over the subsequent three decades of conflict. Owing to the civil unrest during the Troubles, the British government suspended home rule in 1972 and imposed
direct rule. There were several unsuccessful attempts to end the Troubles politically, such as the
Sunningdale Agreement
The Sunningdale Agreement was an attempt to establish a power-sharing Northern Ireland Executive and a cross-border Council of Ireland. The agreement was signed by the British and Irish government in Sunningdale, Berkshire, on 9 December 1 ...
of 1973. In 1998, following a ceasefire by the Provisional IRA and multi-party talks, the
Good Friday Agreement was concluded as a treaty between the British and Irish governments, annexing the text agreed in the multi-party talks.
The substance of the Agreement (formally referred to as the Belfast Agreement) was later endorsed by referendums in both parts of Ireland. The Agreement restored self-government to Northern Ireland on the basis of power-sharing in a regional
Executive drawn from the major parties in a new
Northern Ireland Assembly
The Northern Ireland Assembly (; ), often referred to by the metonym ''Stormont'', is the devolved unicameral legislature of Northern Ireland. It has power to legislate in a wide range of areas that are not explicitly reserved to the Parliam ...
, with entrenched protections for the two main communities. The Executive is jointly headed by a
First Minister and deputy First Minister drawn from the unionist and nationalist parties. Violence had decreased greatly after the Provisional IRA and loyalist ceasefires in 1994, and in 2005, the Provisional IRA announced the end of its armed campaign and an
independent commission supervised its disarmament and that of other nationalist and unionist paramilitary organisations.
The Assembly and power-sharing Executive were suspended several times but were restored again in 2007. In that year the British government officially ended its military support of the police in Northern Ireland (
Operation Banner) and began withdrawing troops. On 27 June 2012, Northern Ireland's deputy first minister and former IRA commander,
Martin McGuinness
James Martin Pacelli McGuinness (; 23 May 1950 – 21 March 2017) was an Irish republican politician and statesman for Sinn Féin and a leader within the Provisional Irish Republican Army (IRA) during The Troubles. He was the deputy First Minist ...
, shook hands with Queen Elizabeth II in Belfast, symbolising reconciliation between the two sides.
Politics
The island is divided between the Republic of Ireland, an independent
state
State most commonly refers to:
* State (polity), a centralized political organization that regulates law and society within a territory
**Sovereign state, a sovereign polity in international law, commonly referred to as a country
**Nation state, a ...
, and Northern Ireland, a constituent country of the United Kingdom. They share an
open border
An open border is a border that enables Freedom of movement, free movement of people and often of goods between jurisdictions with no restrictions on movement and is lacking a border control. A border may be an open border due to intentional leg ...
and both are part of the
Common Travel Area and as a consequence, there is
free movement of people, goods, services and capital across the border.
The Republic of Ireland is a member state of the European Union while the United Kingdom is a former member state, having both acceded to its precursor entity, the European Economic Community (EEC), in 1973 but the UK
left the European Union in 2020 after a
referendum on EU membership was held in 2016 which resulted in 51.9% of UK voters choosing to leave the bloc.
Republic of Ireland
The Republic of Ireland is a
parliamentary democracy
A parliamentary system, or parliamentary democracy, is a form of government where the head of government (chief executive) derives their democratic legitimacy from their ability to command the support ("confidence") of a majority of the legisl ...
based on the
Westminster system
The Westminster system, or Westminster model, is a type of parliamentary system, parliamentary government that incorporates a series of Parliamentary procedure, procedures for operating a legislature, first developed in England. Key aspects of ...
, with a
written constitution and a popularly elected
president whose role is mostly ceremonial. The
Oireachtas
The Oireachtas ( ; ), sometimes referred to as Oireachtas Éireann, is the Bicameralism, bicameral parliament of Republic of Ireland, Ireland. The Oireachtas consists of the president of Ireland and the two houses of the Oireachtas (): a house ...
is a
bicameral
Bicameralism is a type of legislature that is divided into two separate Deliberative assembly, assemblies, chambers, or houses, known as a bicameral legislature. Bicameralism is distinguished from unicameralism, in which all members deliberate ...
parliament, composed of (the Dáil), a house of representatives, and (the Seanad), an
upper house
An upper house is one of two Legislative chamber, chambers of a bicameralism, bicameral legislature, the other chamber being the lower house. The house formally designated as the upper house is usually smaller and often has more restricted p ...
. The
government
A government is the system or group of people governing an organized community, generally a State (polity), state.
In the case of its broad associative definition, government normally consists of legislature, executive (government), execu ...
is headed by a prime minister, the , who is appointed by the president on the nomination of the . Its capital is Dublin.
The Republic of Ireland today ranks among the wealthiest countries in the world in terms of
GDP per capita
This is a list of countries by nominal GDP per capita. GDP per capita is the total value of a country's finished goods and services (gross domestic product) divided by its total population (per capita).
Gross domestic product (GDP) per capita is ...
and in 2015 was ranked the sixth most developed nation in the world by the United Nations'
Human Development Index
The Human Development Index (HDI) is a statistical composite index of life expectancy, Education Index, education (mean years of schooling completed and expected years of schooling upon entering the education system), and per capita income i ...
. A period of rapid economic expansion from 1995 onwards became known as the
Celtic Tiger
The "Celtic Tiger" () is a term referring to the economy of the Republic of Ireland, economy of Ireland from the mid-1990s to the late 2000s, a period of rapid real economic growth fuelled by foreign direct investment. The boom was dampened by ...
period, was brought to an end by the post-2008 Irish economic downturn and an economic depression in 2009. According to the 2024
Global Peace Index, Ireland is the second most peaceful country in the world.
Northern Ireland

Northern Ireland is a part of the United Kingdom with a local
executive and
assembly which exercise devolved powers. The executive is jointly headed by the first and deputy first minister, with the ministries being allocated in proportion to each party's representation in the assembly. Its capital is
Belfast
Belfast (, , , ; from ) is the capital city and principal port of Northern Ireland, standing on the banks of the River Lagan and connected to the open sea through Belfast Lough and the North Channel (Great Britain and Ireland), North Channel ...
.
Ultimately political power is held by the
UK government
His Majesty's Government, abbreviated to HM Government or otherwise UK Government, is the central government, central executive authority of the United Kingdom of Great Britain and Northern Ireland. , from which Northern Ireland has gone through intermittent periods of direct rule during which devolved powers have been suspended. Northern Ireland elects 18 of the UK
House of Commons
The House of Commons is the name for the elected lower house of the Bicameralism, bicameral parliaments of the United Kingdom and Canada. In both of these countries, the Commons holds much more legislative power than the nominally upper house of ...
' 650 MPs. The
Northern Ireland Secretary is a cabinet-level post in the British government.
Along with
England and Wales
England and Wales () is one of the Law of the United Kingdom#Legal jurisdictions, three legal jurisdictions of the United Kingdom. It covers the constituent countries England and Wales and was formed by the Laws in Wales Acts 1535 and 1542. Th ...
and with Scotland, Northern Ireland forms one of the three separate legal jurisdictions of the UK, all of which share the
Supreme Court of the United Kingdom
The Supreme Court of the United Kingdom (initialism: UKSC) is the final court of appeal for all civil cases in the United Kingdom and all criminal cases originating in England, Wales and Northern Ireland, as well as some limited criminal cases ...
as their court of final appeal.
All-island institutions
As part of the Good Friday Agreement, the British and Irish governments agreed on the creation of all-island institutions and areas of cooperation. The
North/South Ministerial Council is an institution through which ministers from the Government of Ireland and the Northern Ireland Executive agree all-island policies. At least six of these policy areas must have an associated all-island "implementation body", and at least six others must be implemented separately in each jurisdiction. The implementation bodies are:
Waterways Ireland, the
Food Safety Promotion Board,
InterTradeIreland, the
Special European Union Programmes Body,
the North/South Language Body and the
Foyle, Carlingford and Irish Lights Commission.
The
British–Irish Intergovernmental Conference provides for co-operation between the Government of Ireland and the Government of the United Kingdom on all matters of mutual interest, especially Northern Ireland. In light of the Republic's particular interest in the governance of Northern Ireland, "regular and frequent" meetings co-chaired by the Irish Minister for Foreign Affairs and the British Secretary of State for Northern Ireland, dealing with non-devolved matters to do with Northern Ireland and non-devolved
all-Ireland issues, are required to take place under the establishing treaty.
The
North/South Inter-Parliamentary Association is a joint parliamentary forum for the island of Ireland. It has no formal powers but operates as a forum for discussing matters of common concern between the respective legislatures.
Geography

Ireland is located in the
north-west of Europe, between latitudes
51° and
56° N, and longitudes
11° and
5° W. It is separated from Great Britain by the
Irish Sea
The Irish Sea is a body of water that separates the islands of Ireland and Great Britain. It is linked to the Celtic Sea in the south by St George's Channel and to the Inner Seas off the West Coast of Scotland in the north by the North Ch ...
and the
North Channel, which has a width of at its narrowest point. To the west is the northern Atlantic Ocean and to the south is the
Celtic Sea, which lies between Ireland and
Brittany
Brittany ( ) is a peninsula, historical country and cultural area in the north-west of modern France, covering the western part of what was known as Armorica in Roman Gaul. It became an Kingdom of Brittany, independent kingdom and then a Duch ...
, in France. Ireland has a total area of ,
of which the Republic of Ireland occupies 83 percent. Ireland and Great Britain, together with many nearby smaller islands, are known collectively as the
British Isles
The British Isles are an archipelago in the Atlantic Ocean, North Atlantic Ocean off the north-western coast of continental Europe, consisting of the islands of Great Britain, Ireland, the Isle of Man, the Inner Hebrides, Inner and Outer Hebr ...
.
As
the term ''British Isles'' can be controversial in relation to Ireland, the alternate term ''Britain and Ireland'' is sometimes used as a neutral term for the islands.
A ring of coastal mountains surrounds low plains at the centre of the island. The highest of these is
Carrauntoohil () in
County Kerry
County Kerry () is a Counties of Ireland, county on the southwest coast of Republic of Ireland, Ireland, within the Provinces of Ireland, province of Munster and the Southern Region, Ireland, Southern Region. It is bordered by two other countie ...
, which rises to above sea level.
The most arable land lies in the province of
Leinster
Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland.
The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
. Western areas are mainly mountainous and rocky with green panoramic vistas.
River Shannon, the island's longest river at long, rises in
County Cavan
County Cavan ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Ulster and is part of the Northern and Western Region. It is named after the town of Cavan and is based on the hi ...
in the north-west and flows through
Limerick
Limerick ( ; ) is a city in western Ireland, in County Limerick. It is in the Provinces of Ireland, province of Munster and is in the Mid-West Region, Ireland, Mid-West which comprises part of the Southern Region, Ireland, Southern Region. W ...
in the midwest.
Geology

The island consists of varied
geological provinces. In the west, around County Galway and
County Donegal
County Donegal ( ; ) is a Counties of Ireland, county of the Republic of Ireland. It is in the Provinces of Ireland, province of Ulster and is the northernmost county of Ireland. The county mostly borders Northern Ireland, sharing only a small b ...
, is a medium- to high-grade metamorphic and igneous complex of
Caledonide affinity, similar to the
Scottish Highlands
The Highlands (; , ) is a historical region of Scotland. Culturally, the Highlands and the Scottish Lowlands, Lowlands diverged from the Late Middle Ages into the modern period, when Scots language, Lowland Scots language replaced Scottish Gae ...
. Across southeast Ulster and extending southwest to
Longford and south to
Navan
Navan ( ; , meaning "the Cave") is the county town and largest town of County Meath, Republic of Ireland, Ireland. It is at the confluence of the River Boyne and Leinster Blackwater, Blackwater, around 50 km northwest of Dublin. At the ...
is a province of
Ordovician
The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ...
and
Silurian
The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...
rocks, with similarities to the
Southern Uplands
The Southern Uplands () are the southernmost and least populous of mainland Scotland's three major geographic areas (the others being the Central Lowlands and the Highlands). The term is used both to describe the geographical region and to col ...
province of Scotland. Further south, along the
County Wexford
County Wexford () is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Leinster and is part of the Southern Region, Ireland, Southern Region. Named after the town of Wexford, it was ba ...
coastline, is an area of granite
intrusives into more Ordovician and Silurian rocks, like that found in Wales.
In the southwest, around
Bantry Bay
Bantry Bay () is a bay located in County Cork, Ireland. The bay runs approximately from northeast to southwest into the Atlantic Ocean. It is approximately 3-to-4 km (1.8-to-2.5 miles) wide at the head and wide at the entrance.
Geograp ...
and the mountains of
MacGillycuddy's Reeks, is an area of substantially deformed, lightly
metamorphosed Devonian
The Devonian ( ) is a period (geology), geologic period and system (stratigraphy), system of the Paleozoic era (geology), era during the Phanerozoic eon (geology), eon, spanning 60.3 million years from the end of the preceding Silurian per ...
-aged rocks. This partial ring of "hard rock" geology is covered by a blanket of
Carboniferous
The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the ...
limestone over the centre of the country, giving rise to a comparatively fertile and lush landscape. The west-coast district of
the Burren
The Burren ( ; ) is a karst/glaciokarst landscape centred in County Clare, on the west coast of Republic of Ireland, Ireland. around
Lisdoonvarna has well-developed
karst
Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and Dolomite (rock), dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. Ther ...
features. Significant stratiform lead-zinc mineralisation is found in the limestones around
Silvermines and
Tynagh.
Hydrocarbon exploration is ongoing following the first major find at the
Kinsale Head gas field off
Cork in the mid-1970s.
In 1999, economically significant finds of natural gas were made in the
Corrib Gas Field off the County Mayo coast. This has increased activity off the west coast in parallel with the "
West of Shetland" step-out development from the
North Sea hydrocarbon province. In 2000, the
Helvick oil field was discovered, which was estimated to contain over of oil.
Climate
The island's lush vegetation, a product of its mild climate and frequent rainfall, earns it the sobriquet ''the Emerald Isle''. Overall, Ireland has a mild but changeable
oceanic climate
An oceanic climate, also known as a marine climate or maritime climate, is the temperate climate sub-type in Köppen climate classification, Köppen classification represented as ''Cfb'', typical of west coasts in higher middle latitudes of co ...
with few extremes. The climate is typically insular and
temperate
In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ran ...
, avoiding the extremes in temperature of many other areas in the world at similar latitudes.
This is a result of the moist winds which ordinarily prevail from the southwestern Atlantic.
Precipitation falls throughout the year but is light overall, particularly in the east. The west tends to be wetter on average and prone to Atlantic storms, especially in the late autumn and winter months. These occasionally bring destructive winds and higher total rainfall to these areas, as well as sometimes snow and hail. The regions of north County Galway and east County Mayo have the highest incidents of recorded lightning annually for the island, with lightning occurring approximately five to ten days per year in these areas.
Munster
Munster ( or ) is the largest of the four provinces of Ireland, located in the south west of the island. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings" (). Following the Nor ...
, in the south, records the least snow whereas
Ulster
Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
, in the north, records the most.
Inland areas are warmer in summer and colder in winter. Usually around 40 days of the year are below freezing at inland
weather station
A weather station is a facility, either on land or sea, with instruments and equipment for measuring atmosphere of Earth, atmospheric conditions to provide information for weather forecasting, weather forecasts and to study the weather and clima ...
s, compared to 10 days at coastal stations. Ireland is sometimes affected by heat waves, most recently in 1995,
2003
2003 was designated by the United Nations as the International Year of Fresh water, Freshwater.
In 2003, a Multi-National Force – Iraq, United States-led coalition 2003 invasion of Iraq, invaded Iraq, starting the Iraq War.
Demographic ...
,
2006, 2013 and
2018
Events January
* January 1 – Bulgaria takes over the Presidency of the Council of the European Union, after the Estonian presidency.
* January 4 – SPLM-IO rebels loyal to Chan Garang Lual start a raid against Juba, capital of ...
. In common with the rest of Europe, Ireland experienced unusually cold weather during
the winter of 2010–11. Temperatures fell as low as −17.2 °C (1 °F) in County Mayo on 20 December and up to a metre (3 ft) of snow fell in mountainous areas.
Flora and fauna
Unlike Great Britain which had a land bridge with
mainland Europe, Ireland only had an ice bridge ending around 14,000 years ago at the end of the
last ice age and as a result, it has fewer land animal and plant species than Great Britain or mainland Europe.
There are
55 mammal species in Ireland, and of them, only 26 land mammal species are considered native to Ireland.
[Costello, M.J. and Kelly, K.S., 1993 ''Biogeography of Ireland: past, present and future'' Irish Biogeographic Society Occasional Publications Number 2] Some species, such as, the
red fox
The red fox (''Vulpes vulpes'') is the largest of the true foxes and one of the most widely distributed members of the order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe and Asia, plus ...
,
hedgehog
A hedgehog is a spiny mammal of the subfamily Erinaceinae, in the eulipotyphlan family Erinaceidae. There are 17 species of hedgehog in five genera found throughout parts of Europe, Asia, and Africa, and in New Zealand by introduction. The ...
and
badger
Badgers are medium-sized short-legged omnivores in the superfamily Musteloidea. Badgers are a polyphyletic rather than a natural taxonomic grouping, being united by their squat bodies and adaptions for fossorial activity rather than by the ...
, are very common, whereas others, like the
Irish hare,
red deer
The red deer (''Cervus elaphus'') is one of the largest deer species. A male red deer is called a stag or Hart (deer), hart, and a female is called a doe or hind. The red deer inhabits most of Europe, the Caucasus Mountains region, Anatolia, Ir ...
and
pine marten are less so. Aquatic wildlife, such as species of sea turtle, shark, seal, whale, and dolphin, are common off the coast. About 400 species of birds have been recorded in Ireland. Many of these are migratory, including the
barn swallow.

Several different habitat types are found in Ireland, including farmland, open woodland,
temperate broadleaf and mixed forests,
conifer
Conifers () are a group of conifer cone, cone-bearing Spermatophyte, seed plants, a subset of gymnosperms. Scientifically, they make up the phylum, division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a sin ...
plantations,
peat
Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most ...
bogs and a variety of coastal habitats. However, agriculture drives current land use patterns in Ireland, limiting natural habitat preserves,
particularly for larger wild mammals with greater territorial needs. With no large
apex predator
An apex predator, also known as a top predator or superpredator, is a predator at the top of a food chain, without natural predators of its own.
Apex predators are usually defined in terms of trophic dynamics, meaning that they occupy the hig ...
s in Ireland other than humans and dogs, such populations of animals as semi-wild deer that cannot be controlled by smaller predators, such as the fox, are controlled by annual culling.
There are no snakes in Ireland, and only one species of reptile (the Viviparous lizard, common lizard) is native to the island. Extinct species include the Irish elk, the great auk, brown bear and the Wolves in Ireland, wolf. Some previously extinct birds, such as the golden eagle, have been reintroduced after decades of Local extinction, extirpation.
Ireland is now one of the least forested countries in Europe. Until the end of the Middle Ages, Ireland was heavily forested. Native species include deciduous trees such as oak, Fraxinus excelsior, ash, Corylus avellana, hazel, birch, Alnus glutinosa, alder, willow, Populus tremula, aspen, Sorbus aucuparia, rowan and Crataegus monogyna, hawthorn, as well as evergreen trees such Scots pine, Taxus baccata, yew, Ilex aquifolium, holly and Arbutus unedo, strawberry trees. Only about 10% of Ireland today is woodland;
[ most of this is non-native conifer plantations, and only 2% is native woodland.][ The average woodland cover of European countries is over 33%.][ In the Republic, about is owned by the state, mainly by the forestry service Coillte.][ Remnants of native forest can be found scattered around the island, in particular in the Killarney National Park.
]
Much of the land is now covered with pasture and there are many species of wild-flower. Gorse (''Ulex europaeus''), a wild furze, is commonly found growing in the uplands and ferns are plentiful in the more moist regions, especially in the western parts. It is home to hundreds of plant species, some of them unique to the island, and has been "invaded" by some grasses, such as ''Spartina anglica''.
The algal and seaweed flora is that of the cold-temperate variety. The total number of species is 574 The island has been invaded by some algae, some of which are now well established.
Because of its mild climate, many species, including subtropics, sub-tropical species such as Arecaceae, palm trees, are grown in Ireland. Phytogeography, Phytogeographically, Ireland belongs to the Atlantic European province of the Circumboreal Region within the Boreal Kingdom. The island can be subdivided into two ecoregions: the Celtic broadleaf forests and North Atlantic moist mixed forests.
Impact of agriculture
The long history of agricultural production, coupled with modern intensive agricultural methods such as pesticide and fertiliser use and runoff from contaminants into streams, rivers and lakes, has placed pressure on biodiversity in Ireland. A land of green fields for crop cultivation and cattle rearing limits the space available for the establishment of native wild species. Hedgerows, however, traditionally used for maintaining and demarcating land boundaries, act as a refuge for native wild flora. This ecosystem stretches across the countryside and acts as a network of connections to preserve remnants of the ecosystem that once covered the island. Subsidies under the Common Agricultural Policy, which supported agricultural practices that preserved hedgerow environments, are undergoing reforms. The Common Agricultural Policy had in the past subsidised potentially destructive agricultural practices, for example by emphasising production without placing limits on indiscriminate use of fertilisers and pesticides; but reforms have gradually decoupled subsidies from production levels and introduced environmental and other requirements. 32% of Ireland's greenhouse gas emissions are correlated to agriculture. Forested areas typically consist of monoculture plantations of non-native species, which may result in habitats that are not suitable for supporting native species of invertebrates. Natural areas require fencing to prevent over-grazing by Deer of Ireland, deer and sheep that roam over uncultivated areas. Grazing in this manner is one of the main factors preventing the natural regeneration of forests across many regions of the country.
Demographics
The population of Ireland is just over 7 million, of which approximately 5.1 million reside in the Republic of Ireland and 1.9 million reside in Northern Ireland.
People have lived in Ireland for over 9,000 years. Early historical and genealogical records note the existence of major groups such as the , , , , , , , , . Later major groups included the , , . Smaller groups included the (see ), , , , , , , , , , , , , , , , , . Many survived into late medieval times, others vanished as they became politically unimportant. Over the past 1,200 years, Vikings, Normans, Welsh people, Welsh, Flemings, Scottish people, Scots, English, African diaspora, Africans and Eastern Europeans have all added to the population and have had significant influences on Irish culture.
The population of Ireland rose rapidly from the 16th century until the mid-19th century, interrupted briefly by the Irish Famine (1740–41), Famine of 1740–41, which killed roughly two-fifths of the island's population. The population rebounded and multiplied over the next century, but the Great Famine of the 1840s caused one million deaths and forced over one million more to emigrate in its immediate wake. Over the following century, the population was reduced by over half, at a time when the general trend in European countries was for populations to rise by an average of three-fold.
Ireland's largest religious group is Christianity. The largest denomination is Roman Catholicism, representing over 73% of the island (and about 87% of the Republic of Ireland). Most of the rest of the population adhere to one of the various Protestant denominations (about 48% of Northern Ireland). The largest is the Anglicanism, Anglican Church of Ireland. The Islam in Ireland, Muslim community is growing in Ireland, mostly through increased immigration, with a 50% increase in the republic between the 2006 and 2011 census. The island has a small History of the Jews in Ireland, Jewish community. About 4% of the Republic's population and about 14% of the Northern Ireland population describe themselves as of no religion. In a 2010 survey conducted on behalf of the Irish Times, 32% of respondents said they went to a religious service more than once per week.
Divisions and settlements
Traditionally, Ireland is subdivided into Provinces of Ireland, four provinces: Connacht
Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uà Fiachrach, Uà Briúin, Uà Maine, C ...
(west), Leinster
Leinster ( ; or ) is one of the four provinces of Ireland, in the southeast of Ireland.
The modern province comprises the ancient Kingdoms of Meath, Leinster and Osraige, which existed during Gaelic Ireland. Following the 12th-century ...
(east), Munster
Munster ( or ) is the largest of the four provinces of Ireland, located in the south west of the island. In early Ireland, the Kingdom of Munster was one of the kingdoms of Gaelic Ireland ruled by a "king of over-kings" (). Following the Nor ...
(south), and Ulster
Ulster (; or ; or ''Ulster'') is one of the four traditional or historic provinces of Ireland, Irish provinces. It is made up of nine Counties of Ireland, counties: six of these constitute Northern Ireland (a part of the United Kingdom); t ...
(north). In a system that developed between the 13th and 17th centuries, Ireland has Counties of Ireland, 32 traditional counties. Twenty-six of these counties are in the Republic of Ireland, and Counties of Northern Ireland, six are in Northern Ireland. The six counties that constitute Northern Ireland are all in the province of Ulster (which has nine counties in total). As such, ''Ulster'' is often used as a synonym for Northern Ireland, although the two are not coterminous. In the Republic of Ireland, counties form the basis of the system of local government. Counties County Dublin, Dublin, Cork, County Limerick, Limerick, County Galway, Galway, County Waterford, Waterford and County Tipperary, Tipperary have been broken up into smaller administrative areas. However, they are still treated as counties for cultural and some official purposes, for example, postal addresses and by the Ordnance Survey Ireland. Counties in Northern Ireland are Local government in Northern Ireland, no longer used for local governmental purposes, but, as in the Republic, their traditional boundaries are still used for informal purposes such as sports leagues and in cultural or tourism contexts.
City status in Ireland is decided by legislation, legislative or royal charter. Dublin, with over one million residents in the Greater Dublin Area, is the largest city on the island. Belfast, with 579,726 residents, is the largest city in Northern Ireland. City status does not directly equate with population size. For example, Armagh, with 14,590 is the seat of the Church of Ireland and the Roman Catholic Primate of All Ireland and was re-granted City status in the United Kingdom#Northern Ireland, city status by Queen Elizabeth II in 1994 (having lost that status in Municipal Corporations (Ireland) Act 1840, local government reforms of 1840). In the Republic of Ireland, Kilkenny, the seat of the Butler dynasty, while no longer a city for administrative purposes (since the 2001 Local Government Act 2001, Local Government Act), is entitled by law to continue to use the description.
Migration
The population of Ireland collapsed dramatically during the second half of the 19th century. A population of over eight million in 1841 was reduced to slightly over four million by 1921. In part, the fall in population was caused by death from the Great Famine of 1845 to 1852, which took roughly one million lives. The remaining decline of around three million was due to the entrenched culture of emigration caused by the dire economic state of the country, lasting until the late 20th century.
Emigration from Ireland in the 19th century contributed to the populations of England, the United States, Canada and Australia, in all of which a large Irish diaspora lives. , 4.3 million Canadians, or 14% of the population, were of Irish descent, while around one-third of the Australian population had an element of Irish descent. , there were 40 million Irish-Americans and 33 million Americans who claimed Irish ancestry.
With growing prosperity since the last decade of the 20th century, Ireland became a destination for immigrants. Since the European Union expanded to include Poland in 2004, Polish people have comprised the largest number of immigrants (over 150,000) from Central Europe. There has also been significant immigration from Lithuania, Czech Republic and Latvia.
Demographics of the Republic of Ireland#Immigration, The Republic of Ireland in particular has seen large-scale immigration, with 420,000 foreign nationals as of 2006, about 10% of the population. Nearly a quarter of births (24 percent) in 2009 were to mothers born outside of Ireland. Up to 50,000 eastern and central European migrant workers left Ireland in response to the post-2008 Irish economic downturn.
Languages
The two official languages of the Republic of Ireland are Irish and English. Each language has produced noteworthy literature. Irish, though now only the language of a minority, was the vernacular of the Irish people for thousands of years and was possibly introduced during the Iron Age. It began to be written down after Christianisation in the 5th century and spread to Scotland and the Isle of Man, where it evolved into the Scottish Gaelic and Manx Language, Manx languages, respectively.
The Irish language has a vast treasury of written texts from many centuries and is divided by linguists into Old Irish
Old Irish, also called Old Gaelic (, Ogham, Ogham script: ᚌᚑᚔᚇᚓᚂᚉ; ; ; or ), is the oldest form of the Goidelic languages, Goidelic/Gaelic language for which there are extensive written texts. It was used from 600 to 900. The ...
from the 6th to 10th century, Middle Irish from the 10th to 13th century, Early Modern Irish until the 17th century, and the Modern Irish spoken today. It remained the dominant language of Ireland for most of those periods, having influences from Latin Language, Latin, Old Norse, Anglo-Norman language, French and English. It declined under British rule but remained the majority tongue until the early 19th century, and since then has been a minority language.
The Gaelic Revival of the late 19th and early 20th centuries had a long-term influence. Irish is taught in mainstream Irish schools as a compulsory subject, but teaching methods have been criticised for their ineffectiveness, with most students showing little evidence of fluency even after 14 years of instruction.
There is now a growing population of urban Irish speakers in both the Republic and Northern Ireland, especially in Dublin and Belfast, with the children of such Irish speakers sometimes attending Irish-medium schools (). It has been argued that they tend to be more highly educated than monolingual English speakers. Recent research suggests that urban Irish is developing in a direction of its own, both in pronunciation and grammar.
Traditional rural Irish-speaking areas, known collectively as the , are in linguistic decline. The main areas are in the west, south-west and north-west, in Galway, Mayo, Donegal, western Cork and Kerry with smaller areas near Dungarvan in Waterford and in Meath.
Hiberno-English, English in Ireland was first introduced during the Norman invasion. It was spoken by a few peasants and merchants brought over from England and was largely replaced by Irish before the Tudor conquest of Ireland. It was introduced as the official language during the Tudor and Cromwellian conquests. The Ulster plantations gave it a permanent foothold in Ulster, and it remained the official and upper-class language elsewhere, the Irish-speaking chieftains and nobility having been deposed. Language shift during the 19th century replaced Irish with English as the first language for a vast majority of the population.
Fewer than 2% of the population of the Republic of Ireland today speak Irish on a daily basis, and under 10% regularly, outside of the education system and 38% of those over 15 years are classified as "Irish speakers". In Northern Ireland, English is the de facto official language, but official recognition is afforded to Irish, including specific protective measures under Part III of the European Charter for Regional or Minority Languages. A lesser status (including recognition under Part II of the Charter) is given to Ulster Scots dialects, which are spoken by roughly 2% of Northern Ireland residents, and also spoken by some in the Republic of Ireland. Since the 1960s with the increase in immigration, many more languages have been introduced, particularly deriving from Asia and Eastern Europe.
Also native to Ireland are Shelta language, Shelta, the language of the nomadic Irish Travellers, Irish Sign Language, and Northern Ireland Sign Language.
Culture
Ireland's culture comprises elements of the culture of ancient peoples, later immigrant and broadcast cultural influences (chiefly Gaelic culture, Anglicisation, Americanisation and aspects of broader European culture). In broad terms, Ireland is regarded as one of the Celtic nations of Europe, alongside Scotland, Wales, Cornwall, Isle of Man and Brittany. This combination of cultural influences is visible in the intricate designs termed ''Irish Interlace (visual arts), interlace'' or ''Celtic knotwork.'' These can be seen in the ornamentation of medieval religious and secular works. The style is still popular today in jewellery and graphic art, as is the distinctive style of traditional Irish music and dance, and has become indicative of modern "Celtic" culture in general.
Religion in Ireland, Religion has played a significant role in the cultural life of the island since ancient times (and since the 17th century plantations, has been the focus of political identity and divisions on the island). Ireland's pre-Christian heritage fused with the Celtic Church following the missions of Saint Patrick in the fifth century. The Hiberno-Scottish missions, begun by the Irish monk Saint Columba, spread the Irish vision of Christianity to pagan England and the Frankish Empire. These missions brought written language to an illiterate population of Europe during the Dark Ages that followed the fall of Rome, earning Ireland the sobriquet, "the island of saints and scholars".
Since the 20th century Irish pubs worldwide have become outposts of Irish culture, especially those with a full range of cultural and gastronomic offerings.
Arts
Literature
Ireland has made a substantial contribution to world literature in all its branches, both in Irish and English. Poetry in Irish is among the oldest vernacular literature, vernacular poetry in Europe, with the earliest examples dating from the 6th century.
Irish remained the dominant literary language down to the 19th century, despite the spread of English from the 17th century on. Prominent names from the medieval period and later include (14th century), (17th century) and Aogán Ó Rathaille (18th century). () was an outstanding poet in the oral tradition. The latter part of the 19th century saw a rapid replacement of Irish by English. By 1900, however, cultural nationalists had begun the Gaelic revival, which saw the beginnings of modern literature in Irish. This was to produce a number of notable writers, including , and others. Irish-language publishers such as and continue to produce scores of titles every year.
In English, Jonathan Swift, often called the foremost satirist in the English language, gained fame for works such as ''Gulliver's Travels'' and ''A Modest Proposal''. Other notable 18th-century writers of Irish origin included Oliver Goldsmith and Richard Brinsley Sheridan, though they spent most of their lives in England. The Anglo-Irish novel came to the fore in the 19th century, featuring such writers as Charles Kickham, William Carleton, and (in collaboration) Edith Somerville and Violet Florence Martin. The playwright and poet Oscar Wilde, noted for his epigrams, was born in Ireland.
In the 20th century, Ireland produced four winners of the Nobel Prize for Literature: George Bernard Shaw, William Butler Yeats, Samuel Beckett and Seamus Heaney. Although not a Nobel Prize winner, James Joyce is widely considered to be one of the most significant writers of the 20th century. Joyce's 1922 novel ''Ulysses (novel), Ulysses'' is considered one of the most important works of Modernist literature and his life is celebrated annually on 16 June in Dublin as "Bloomsday". A comparable writer in Irish is MáirtÃn Ó Cadhain, whose 1949 novel is regarded as a modernist masterpiece and has been translated into several languages.
Modern Irish literature is often connected with its rural heritage through English-language writers such as John McGahern and Seamus Heaney and Irish-language writers such as and others from the .
Music and dance
Music has been in evidence in Ireland since prehistoric times. Although in the early Middle Ages the church was "quite unlike its counterpart in continental Europe", there was a considerable interchange between monastic settlements in Ireland and the rest of Europe that contributed to what is known as Gregorian chant. Outside religious establishments, musical genres in early Gaelic Ireland are referred to as a triad of weeping music (''goltraige''), laughing music (''geantraige'') and sleeping music (''suantraige''). Vocal and instrumental music (e.g. for the harp, pipes, and various string instruments) was transmitted orally, but the Irish harp, in particular, was of such significance that it became Ireland's national symbol. Classical music following European models first developed in urban areas, in establishments of Anglo-Irish rule such as Dublin Castle, St Patrick's Cathedral, Dublin, St Patrick's Cathedral and Christ Church Cathedral, Dublin, Christ Church as well as the country houses of the Anglo-Irish ascendancy, with the first performance of George Frideric Handel, Handel's ''Messiah (Handel), Messiah'' (1742) being among the highlights of the baroque era. In the 19th century, public concerts provided access to classical music to all classes of society. Yet, for political and financial reasons Ireland has been too small to provide a living to many musicians, so the names of the better-known List of Irish classical composers, Irish composers of this time belong to emigrants.
Irish folk music, traditional music and dance have seen a surge in popularity and global coverage since the 1960s. In the middle years of the 20th century, as Irish society was modernising, traditional music had fallen out of favour, especially in urban areas. However during the 1960s, there was a revival of interest in Irish traditional music led by groups such as the Dubliners, the Chieftains, the Wolfe Tones, the Clancy Brothers, Sweeney's Men and individuals like and Christy Moore. Groups and musicians including Horslips, Van Morrison and Thin Lizzy incorporated elements of Irish traditional music into contemporary rock music and, during the 1970s and 1980s, the distinction between traditional and rock musicians became blurred, with many individuals regularly crossing over between these styles of playing. This trend can be seen more recently in the work of artists like Enya, the Saw Doctors, the Corrs, Sinéad O'Connor, Clannad (musical group), Clannad, the Cranberries and the Pogues among others.
Art
The earliest known Irish graphic art and sculpture are Neolithic carvings found at sites such as Newgrange and is traced through Bronze Age artefacts and the religious carvings and illuminated manuscripts of the medieval period. During the course of the 19th and 20th centuries, a strong tradition of painting emerged, including such figures as John Butler Yeats, William Orpen, Jack Yeats and Louis le Brocquy. Contemporary Irish visual artists of note include Sean Scully, Kevin Abosch, and Alice Maher.
Drama and theatre
The Republic of Ireland's national theatre is the Abbey Theatre, which was founded in 1904, and the national Irish-language theatre is , which was established in 1928 in Galway. Playwrights such as Seán O'Casey, Brian Friel, Sebastian Barry, Conor McPherson and Billy Roche are internationally renowned.
Science
The Irish philosopher and theologian Johannes Scotus Eriugena was considered one of the leading intellectuals of the early Middle Ages. Sir Ernest Henry Shackleton, an Irish explorer, was one of the principal figures of Antarctic exploration. He, along with his expedition, made the first ascent of Mount Erebus and the discovery of the approximate location of the South Magnetic Pole. Robert Boyle was a 17th-century natural philosopher, chemist, physicist, inventor and early gentleman scientist. He is largely regarded as one of the founders of modern chemistry and is best known for the formulation of Boyle's law.
19th-century physicist, John Tyndall, discovered the Tyndall effect. Father Nicholas Joseph Callan, professor of natural philosophy in Maynooth College, is best known for his invention of the induction coil, transformer and he discovered an early method of galvanisation in the 19th century.
Other notable Irish physicists include Ernest Walton, winner of the 1951 Nobel Prize in Physics. With Sir John Douglas Cockcroft, he was the first to split the nucleus of the atom by artificial means and made contributions to the development of a new theory of wave equation. William Thomson, or Lord Kelvin, is the person whom the absolute temperature unit, the kelvin, is named after. Sir Joseph Larmor, a physicist and mathematician, made innovations in the understanding of electricity, dynamics, thermodynamics and the electron theory of matter. His most influential work was Aether and Matter, a book on theoretical physics published in 1900.
George Johnstone Stoney introduced the term ''electron'' in 1891. John Stewart Bell was the originator of Bell's Theorem and a paper concerning the discovery of the Chiral anomaly, Bell-Jackiw-Adler anomaly and was nominated for a Nobel prize. The astronomer Jocelyn Bell Burnell, from Lurgan, County Armagh, discovered pulsars in 1967. Notable mathematicians include Sir William Rowan Hamilton, famous for work in Hamiltonian mechanics, classical mechanics and the invention of quaternions. Francis Ysidro Edgeworth's contribution, the Edgeworth Box. remains influential in neo-classical microeconomic theory to this day; while Richard Cantillon inspired Adam Smith, among others. John B. Cosgrave was a specialist in number theory and discovered a 2000-digit prime number in 1999 and a record composite Fermat number in 2003. John Lighton Synge made progress in different fields of science, including mechanics and geometrical methods in general relativity. He had mathematician John Forbes Nash Jr., John Nash as one of his students. Kathleen Lonsdale, born in Ireland and most known for her work with X-ray crystallography, crystallography, became the first female president of the British Association for the Advancement of Science.
Ireland has nine universities, seven in the Republic of Ireland and two in Northern Ireland, including Trinity College Dublin and the University College Dublin, as well as numerous third-level colleges and institutes and a branch of the Open University, the Open University in Ireland. Ireland was ranked 19th in the Global Innovation Index in 2024.
Sports
Gaelic football is the most popular sport in Ireland in terms of match attendance and community involvement, with about 2,600 clubs on the island. In 2003 it represented 34% of total sports attendances at events in Ireland and abroad, followed by hurling at 23%, soccer at 16% and rugby football, rugby at 8%. The All-Ireland Football Final is the most watched event in the sporting calendar. Soccer is the most widely played team game on the island and the most popular in Northern Ireland.
Other sporting activities with the highest levels of playing participation include swimming, golf, aerobics, cycling, and billiards/snooker. Many other sports are also played and followed, including boxing
Boxing is a combat sport and martial art. Taking place in a boxing ring, it involves two people – usually wearing protective equipment, such as boxing glove, protective gloves, hand wraps, and mouthguards – throwing Punch (combat), punch ...
, cricket, fishing, greyhound racing, Gaelic handball, handball, field hockey, hockey, horse racing, motor sport, show jumping and tennis.
The island fields a single international team in most sports. One notable exception to this is association football, although both associations continued to field international teams under the name "Ireland" until the 1950s. The sport is also the most notable exception where the Republic of Ireland national football team, Republic of Ireland and Northern Ireland national football team, Northern Ireland field separate international teams. Northern Ireland has produced two World Snooker Champions.
Ireland is ranked 10th in the ICC Men's Test Team Rankings 2025 with a rating of 30.
Field sports
Gaelic football, hurling and Gaelic handball are the best-known Irish traditional sports, collectively known as Gaelic games. Gaelic games are governed by the Gaelic Athletic Association (GAA), with the exception of women's Gaelic football and camogie (women's variant of hurling), which are governed by separate organisations. The headquarters of the GAA (and the main stadium) is located at Croke Park in north Dublin and has a capacity of 82,500. Many major GAA games are played there, including the semi-finals and finals of the All-Ireland Senior Football Championship and All-Ireland Senior Hurling Championship. During the redevelopment of the Lansdowne Road, Lansdowne Road stadium in 2007–2010, international rugby and soccer were played there. All GAA players, even at the highest level, are amateurs, receiving no wages, although they are permitted to receive a limited amount of sport-related income from commercial sponsorship.
The Irish Football Association (IFA) was originally the governing body for soccer across the island. The game has been played in an organised fashion in Ireland since the 1870s, with Cliftonville F.C. in Belfast being Ireland's oldest club. It was most popular, especially in its first decades, around Belfast and in Ulster. However, some clubs based outside Belfast thought that the IFA largely favoured Ulster-based clubs in such matters as selection for the national team. In 1921, following an incident in which, despite an earlier promise, the IFA moved an Irish Cup semi-final replay from Dublin to Belfast, Dublin-based clubs broke away to form the Football Association of the Irish Free State. Today the southern association is known as the Football Association of Ireland (FAI). Despite being initially blacklisted by the Home Nations' associations, the FAI was recognised by FIFA in 1923 and organised its first international fixture in 1926 (against Italy national football team, Italy). However, both the IFA and FAI continued to select their teams from the whole of Ireland, with some players earning international caps for matches with both teams. Both also referred to their respective teams as ''Ireland''.
In 1950, FIFA directed the associations only to select players from within their respective territories and, in 1953, directed that the FAI's team be known only as "Republic of Ireland" and that the IFA's team be known as "Northern Ireland" (with certain exceptions). Northern Ireland qualified for the FIFA World Cup, World Cup finals in 1958 FIFA World Cup, 1958 (reaching the quarter-finals), 1982 FIFA World Cup, 1982 and 1986 FIFA World Cup, 1986 and the UEFA European Championship, European Championship in UEFA Euro 2016, 2016. The Republic qualified for the World Cup finals in 1990 FIFA World Cup, 1990 (reaching the quarter-finals), 1994 FIFA World Cup, 1994, 2002 FIFA World Cup, 2002 and the European Championship in UEFA Euro 1988, 1988, UEFA Euro 2012, 2012 and 2016. Across Ireland, there is significant interest in the Premier League, English and, to a lesser extent, Scottish Premier League, Scottish soccer leagues.
Ireland fields a single Ireland national rugby union team, national rugby team and a single association, the Irish Rugby Football Union, governs the sport across the island. The Irish rugby team have played in every Rugby World Cup, making the quarter-finals in eight of them. Ireland also hosted games during the 1991 Rugby World Cup, 1991 and the 1999 Rugby World Cups (including a quarter-final). There are four professional Irish teams; all four play in the Pro14 and at least three compete for the Heineken Cup. Irish rugby has become increasingly competitive at both the international and provincial levels since the sport went professional in 1994. During that time, Ulster Rugby, Ulster (1998–99 Heineken Cup, 1999), Munster Rugby, Munster (2005–06 Heineken Cup, 2006 and 2007–08 Heineken Cup, 2008) and Leinster Rugby, Leinster (2008–09 Heineken Cup, 2009, 2010–11 Heineken Cup, 2011 and 2011–12 Heineken Cup, 2012) have won the Heineken Cup. In addition to this, the Irish International side has had increased success in the Six Nations Championship against the other European elite sides. This success, including Triple Crown (rugby union), Triple Crowns in 2004, 2006 and 2007, culminated with a clean sweep of victories, known as a Grand Slam (rugby union), Grand Slam, in 2009 and 2018.
Boxing
Amateur boxing on the island of Ireland is governed by the Irish Athletic Boxing Association. Ireland has won more medals in boxing than in any other Olympic sport. Michael Carruth won a gold medal and Wayne McCullough won a silver medal in the 1992 Summer Olympics, Barcelona Olympic Games. In 2008 Kenneth Egan won a silver medal in the Beijing Games. Paddy Barnes secured bronze in those games and gold in the 2010 European Amateur Boxing Championships (where Ireland came 2nd in the overall medal table) and 2010 Commonwealth Games. Katie Taylor has won gold in every European and World championship since 2005. In August 2012 at the Olympic Games in London, Taylor created history by becoming the first Irish woman to win a gold medal in boxing in the 60 kg lightweight. More recently, Kellie Harrington won a gold medal at the 2020 Tokyo Olympics.
Other sports
Horse racing and greyhound racing are both popular in Ireland. There are frequent horse race meetings and greyhound stadiums are well-attended. The island is noted for the breeding and training of race horses and is also a large exporter of racing dogs. The horse racing sector is largely concentrated in the County Kildare.
Irish athletics is an all-Ireland sport governed by Athletics Ireland. Sonia O'Sullivan won two medals at 5,000 metres on the track; gold at the 1995 IAAF World Championships in Athletics, World Championships and silver at the 2000 Summer Olympics, 2000 Sydney Olympics. Gillian O'Sullivan won silver in the 20k walk at the 2003 World Championships, while sprint hurdler Derval O'Rourke won gold at the 2006 World Indoor Championship in Moscow. Olive Loughnane won a silver medal in the 20k walk at the World Athletics Championships in Berlin in 2009.
Golf is very popular, and golf tourism is a major industry attracting more than 240,000 golfing visitors annually. The 2006 Ryder Cup was held at The Kildare Hotel and Golf Club, The K Club in County Kildare. Pádraig Harrington became the first Irishman since Fred Daly (golfer), Fred Daly in 1947 to win the The Open Championship, British Open at Carnoustie in July 2007. He successfully defended his title in July 2008 before going on to win the PGA Championship in August. Harrington became the first European to win the PGA Championship in 78 years and was the first winner from Ireland. Three golfers from Northern Ireland have been particularly successful. In 2010, Graeme McDowell became the first Irish golfer to win the U.S. Open (golf), U.S. Open, and the first European to win that tournament since 1970. Rory McIlroy, at the age of 22, won the 2011 U.S. Open, while Darren Clarke's latest victory was the 2011 Open Championship at Royal St. George's. In August 2012, McIlroy won his 2nd major championship by winning the USPGA Championship by a record margin of 8 shots.
Recreation
The west coast of Ireland, Lahinch and Donegal Bay in particular, have popular surfing beaches, being fully exposed to the Atlantic Ocean. Donegal Bay is shaped like a funnel and catches west/south-west Atlantic winds, creating good surf, especially in winter. Since just before the year 2010, Bundoran has hosted European championship surfing. Scuba diving is increasingly popular in Ireland with clear waters and large populations of sea life, particularly along the western seaboard. There are also many shipwrecks along the coast of Ireland, with some of the best wreck dives being in Malin Head and off the County Cork coast.
With thousands of lakes, over of fish-bearing rivers and over of List of Irish counties by coastline, coastline, Ireland is a popular angling destination. The temperate Irish climate is suited to sport angling. While salmon and trout fishing remain popular with anglers, salmon fishing, in particular, received a boost in 2006 with the closing of the salmon driftnet fishery. Coarse fishing continues to increase its profile. Sea angling is developed with many beaches mapped and signposted, and the range of sea angling species is around 80.
Food and drink
Food and cuisine in Ireland take their influence from the crops grown and animals farmed in the island's temperate climate and from the social and political circumstances of Irish history. For example, whilst from the Middle Ages until the arrival of the potato in the 16th century the dominant feature of the Irish economy was the herding of cattle, the number of cattle a person owned was equated to their social standing. Thus herders would avoid slaughtering a milk-producing cow.
For this reason, pork and white meat were more common than beef, and thick fatty strips of salted bacon (known as rashers) and the eating of salted butter (i.e. a dairy product rather than beef itself) have been a central feature of the diet in Ireland since the Middle Ages. The practice of bleeding cattle and mixing the blood with milk and butter (not unlike the practice of the Maasai people, Maasai) was common and black pudding, made from blood, grain (usually barley) and seasoning, remains a breakfast staple in Ireland. All of these influences can be seen today in the phenomenon of the "breakfast roll".
The introduction of the potato in the second half of the 16th century heavily influenced cuisine thereafter. Great poverty encouraged a subsistence approach to food, and by the mid-19th century, the vast majority of the population sufficed with a diet of potatoes and milk. A typical family, consisting of a man, a woman and four children, would eat of potatoes per week. Consequently, dishes that are considered as national dishes represent a fundamental simplicity to cooking, such as the Irish stew, bacon and cabbage, boxty, a type of potato pancake, or colcannon, a dish of mashed potatoes and kale or cabbage.
Since the last quarter of the 20th century, with a re-emergence of wealth in Ireland, a "New Irish Cuisine" based on traditional ingredients incorporating international influences has emerged. This cuisine is based on fresh vegetables, fish (especially salmon, trout, oysters, mussels and other shellfish), as well as traditional soda breads and the wide range of hand-made List of Irish cheeses, cheeses that are now being produced across the country. An example of this new cuisine is "Dublin Lawyer": lobster cooked in whiskey and cream. The potato remains however a fundamental feature of this cuisine and the Irish remain the highest per capita consumers of potatoes in Europe. Traditional regional foods can be found throughout the country, for example coddle in Dublin or drisheen in Cork, both a type of sausage, or blaa, a doughy white bread particular to Waterford.
Ireland once dominated the world's market for whiskey, producing 90% of the world's whiskey at the start of the 20th century. However, as a consequence of bootleggers during the prohibition in the United States (who sold poor-quality whiskey bearing Irish-sounding names thus eroding the pre-prohibition popularity for Irish brands) and tariffs on Irish whiskey across the British Empire during the Anglo-Irish Trade War of the 1930s, sales of Irish whiskey worldwide fell to a mere 2% by the mid-20th century. In 1953, an Irish government survey, found that 50% of whiskey drinkers in the United States had never heard of Irish whiskey.
Irish whiskey, as researched in 2009 by the CNBC American broadcaster, remains popular domestically and has grown in international sales steadily over a few decades. Typically CNBC states Irish whiskey is not as smoky as a Scotch whisky, but not as sweet as American whiskey, American or Canadian whiskey, Canadian whiskies. Whiskey forms the basis of Irish Cream, cream liqueurs, such as Baileys Irish Cream, Baileys, and the "Irish coffee" (a cocktail of coffee and whiskey reputedly invented at Foynes, Foynes flying-boat station) is probably the best-known Irish cocktail.
Porter (beer), Stout, a kind of porter beer, particularly Guinness, is typically associated with Ireland, although historically it was more closely associated with London. Porter remains very popular, although it has lost sales since the mid-20th century to lager. Cider, particularly ''Magners'' (marketed in the Republic of Ireland as ''Bulmers''), is also a popular drink. Red lemonade, a soft-drink, is consumed on its own and as a mixer, particularly with whiskey.
Economy
The GDP of the Republic of Ireland was €423.5 billion (nominal), and in Northern Ireland in 2021, it was £52 billion (GVA Balanced). The GDP per capita in the Republic of Ireland was €84,049.9 (nominal) ,[ and in Northern Ireland 2021 was £27,154 (GVA Balanced).] The Republic of Ireland and the United Kingdom measure these numbers differently.
Despite the two jurisdictions using two distinct currencies (the euro and pound sterling), a growing amount of commercial activity is carried out on an all-Ireland basis. This has been facilitated by the two jurisdictions' former shared membership of the European Union, and there have been calls from members of the business community and policymakers for the creation of an "all-Ireland economy" to take advantage of economies of scale and boost competitiveness.
Regional economics
Below is a comparison of the regional GDP on the island of Ireland.
Northern Ireland trade comparison
Below is a comparison of the goods being sold and purchased between Northern Ireland and the United Kingdom, compared with the goods being exported and imported between Northern Ireland and the Republic of Ireland:
Cost of living comparison
Below is a comparison of the monthly cost of living and average wage after tax in Northern Ireland versus those in the Republic of Ireland in 2023:
Economic history
Prior to partition in 1921, Ireland had a long history as an economic colony – first, partially, of the Norse, via their cities (9th to 10th centuries CE), and later, to varying extents, of polities related to England. Though the climate and soil favoured certain forms of agriculture, trade barriers frequently hobbled its development. Repeated invasions and plantations disrupted land tenure, land-ownership, and Irish Rebellion (disambiguation), multiple failed uprisings also contributed to repeated phases of penal transportation, deportation and of Irish emigrant, emigration.
Salient events in the economic history of Ireland include:
* 16th and 17th centuries: confiscation and redistribution of land in the Plantations of Ireland
* 1845–1849: Great Famine (Ireland), The Great Famine occasioned depopulation and mass emigration
* 1846: Westminster's repeal of the Corn Laws disrupted Irish agriculture
Major industries
Tourism
There are two World Heritage Sites on the island: the complex and the Giant's Causeway. Several other places are on the tentative list, for example the Burren, the Ceide Fields and Mount Stewart.
Some of the most visited sites in Ireland include Bunratty Castle, the Rock of Cashel, the Cliffs of Moher, Holy Cross Abbey and Blarney Castle. Historically important monastic sites include Glendalough and Clonmacnoise, which are maintained as National Monument (Ireland), national monuments in the Republic of Ireland.
The Dublin region receives the most tourists and is home to several of the most popular attractions such as the Guinness Storehouse and Book of Kells. The west and south west, which includes the Lakes of Killarney and the Dingle peninsula in County Kerry and Connemara and the Aran Islands in County Galway, are also popular tourist destinations.
Stately homes, built during the 17th, 18th and 19th centuries in Palladian, Neoclassical architecture, Neoclassical and neo-Gothic styles, such as Castle Ward, Castletown House, Bantry House, Strokestown Park and Glenveagh Castle are also of interest to tourists. Some have been converted into hotels, such as Ashford Castle, Castle Leslie and Dromoland Castle.
Energy
Although for most of their existence electricity networks in the Republic of Ireland and Northern Ireland were entirely separate, the island has operated for some time as a single market for electricity. Both networks were designed and constructed independently post-partition but they are now connected with three interlinks and are also connected through Great Britain to mainland Europe. The situation in Northern Ireland is complicated by the issue of private companies not supplying Northern Ireland Electricity with enough power. In the Republic of Ireland, the ESB Group, ESB has failed to modernise its power stations, and the availability of power plants has recently averaged only 66%, one of the worst such rates in Western Europe. EirGrid has started building a High-voltage direct current, HVDC transmission line between Ireland and Great Britain with a capacity of 500 MW, about 10% of Ireland's peak demand.
As with electricity, the natural gas distribution network is also now all-island, with a pipeline linking Gormanston, County Meath, and Ballyclare, County Antrim. Most of Ireland's gas comes through interconnectors between Twynholm in Scotland and Ballylumford power station, Ballylumford, County Antrim and Loughshinny, County Dublin. Supplies come from the Corrib Gas Field, off the coast of County Mayo, with a supply previously also coming from the Kinsale gas field off the County Cork coast. The County Mayo field faces some localised opposition over Corrib gas controversy, a controversial decision to refine the gas onshore.
Ireland has an ancient industry based on peat
Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most ...
(known locally as "turf") as a source of energy for home fires. A form of biomass energy, this source of heat is still widely used in rural areas. However, because of the ecological importance of peatlands in storing carbon and their rarity, the EU is attempting to protect this habitat by fining Ireland for digging up peat. In cities, heat is generally supplied by natural gas or heating oil, although some urban suppliers distribute sods of turf as "smokeless fuel" for domestic use.
The Republic has a strong commitment to renewable energy and ranks as one of the top 10 markets for clean technology, clean-technology investment in the 2014 Global Green Economy Index. Research and development in renewable energy (such as wind power) has increased since 2004. Large List of wind farms in the Republic of Ireland, wind farms have been constructed in Cork, Donegal, Mayo and Antrim. The construction of wind farms has in some cases been delayed by opposition from local communities, some of whom regard the wind turbines as unsightly. The Republic is hindered by an ageing network that was not designed to handle the varying availability of power that comes from wind farms. The ESB's Turlough Hill facility is the only power-storage facility in the state.
Notes
References
Bibliography
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* Beckett, J.C. ''The making of Modern Ireland 1603-1923'' (1971).
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* Bew, Paul. ''Ireland: The Politics of Enmity 1789-2006'' (2007).
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* Daly, Mary E. ''Sixties Ireland: reshaping the economy, state and society, 1957–1973'' (Cambridge University Press, 2016).
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* Ferriter, Diarmaid. "Women and political change in Ireland since 1960." ''Éire-Ireland'' 43.1 (2008): 179–204.
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* Foster, R. F. ''Luck and the Irish: A Brief History of Change 1970-2000'' (2007
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External links
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