Borneo (; id,
Kalimantan
Kalimantan () is the Indonesian portion of the island of Borneo. It constitutes 73% of the island's area. The non-Indonesian parts of Borneo are Brunei and East Malaysia. In Indonesia, "Kalimantan" refers to the whole island of Borneo.
In 2019, ...
) is the
third-largest island in the world and the largest in
Asia
Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an ...
. At the geographic centre of
Maritime Southeast Asia
Maritime Southeast Asia comprises the countries of Brunei, Indonesia, Malaysia, the Philippines, Singapore, and East Timor. Maritime Southeast Asia is sometimes also referred to as Island Southeast Asia, Insular Southeast Asia or Oceanic Sout ...
, in relation to major Indonesian islands, it is located north of
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
, west of
Sulawesi, and east of
Sumatra.
The
island is politically divided among three countries:
Malaysia
Malaysia ( ; ) is a country in Southeast Asia. The federation, federal constitutional monarchy consists of States and federal territories of Malaysia, thirteen states and three federal territories, separated by the South China Sea into two r ...
and
Brunei
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...
in the north, and
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
to the south. Approximately 73% of the island is Indonesian territory. In the north, the
East Malaysia
East Malaysia (), or the Borneo States, also known as Malaysian Borneo, is the part of Malaysia on and near the island of Borneo, the world's third-largest island. Near the coast of Sabah is a small archipelago called Labuan. East Malaysia li ...
n states of
Sabah
Sabah () is a state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory ...
and
Sarawak
Sarawak (; ) is a state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the Malaysian state of Sabah to the northeast, ...
make up about 26% of the island. The population in Borneo is 23,053,723 (2020 national censuses).
Additionally, the Malaysian federal territory of
Labuan
Labuan (), officially the Federal Territory of Labuan ( ms, Wilayah Persekutuan Labuan), is a Federal Territory of Malaysia. Its territory includes and six smaller islands, off the coast of the state of Sabah in East Malaysia. Labuan's capi ...
is situated on a small island just off the coast of Borneo. The sovereign state of
Brunei
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...
, located on the north coast, comprises about 1% of Borneo's land area. A little more than half of the island is in the
Northern Hemisphere, including Brunei and the Malaysian portion, while the Indonesian portion spans the Northern and
Southern
Southern may refer to:
Businesses
* China Southern Airlines, airline based in Guangzhou, China
* Southern Airways, defunct US airline
* Southern Air, air cargo transportation company based in Norwalk, Connecticut, US
* Southern Airways Express, M ...
hemispheres.
Etymology
The island is known by many names. Internationally it is known as ''Borneo'', derived from European contact with the
Brunei kingdom
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...
in the 16th century during the
Age of Exploration
The Age of Discovery (or the Age of Exploration), also known as the early modern period, was a period largely overlapping with the Age of Sail, approximately from the 15th century to the 17th century in European history, during which seafari ...
. On a map from around 1601, Brunei city is referred to as Borneo, and the whole island is also labelled Borneo. The name ''Borneo'' may derive from the
Sanskrit
Sanskrit (; attributively , ; nominalization, nominally , , ) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had Trans-cul ...
word ' (), meaning either "water" or
Varuna
Varuna (; sa, वरुण, , Malay: ''Baruna'') is a Vedic deity associated initially with the sky, later also with the seas as well as Ṛta (justice) and Satya (truth). He is found in the oldest layer of Vedic literature of Hinduism, suc ...
, the Hindu god of rain.
The local population called it ''Klemantan'' or ''
Kalimantan
Kalimantan () is the Indonesian portion of the island of Borneo. It constitutes 73% of the island's area. The non-Indonesian parts of Borneo are Brunei and East Malaysia. In Indonesia, "Kalimantan" refers to the whole island of Borneo.
In 2019, ...
,'' which was derived from the
Sanskrit
Sanskrit (; attributively , ; nominalization, nominally , , ) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had Trans-cul ...
word ''Kalamanthana,'' meaning "burning weather" possibly to describe its hot and humid
tropical
The tropics are the regions of Earth surrounding the Equator. They are defined in latitude by the Tropic of Cancer in the Northern Hemisphere at N and the Tropic of Capricorn in
the Southern Hemisphere at S. The tropics are also referred to ...
weather. Indonesian historian Slamet Muljana suggests that the name ''Kalamanthana'' was derived from Sanskrit terms ''
kala
Kala or Kalah may refer to:
Religion Hinduism
*Kāla, a Sanskrit word meaning ''time''
*Kāla, a Hindu deity of time, destiny, death and destruction closely related to Yama and Shiva.
*Kalā, a Sanskrit word meaning ''performing arts''
*Kala Bo, ...
'' (time or season) and ''manthana'' (churning, kindling or creating fire by friction), which possibly describes the heat of the weather.
In earlier times, the island was known by other names. In 977,
Chinese records
Chinese can refer to:
* Something related to China
* Chinese people, people of Chinese nationality, citizenship, and/or ethnicity
**'' Zhonghua minzu'', the supra-ethnic concept of the Chinese nation
** List of ethnic groups in China, people of v ...
began to use the term ''Bo-ni'' to refer to Borneo. In 1225, it was also mentioned by the Chinese official
Chau Ju-Kua Zhao Rukuo (; 1170–1231), also read as Zhao Rugua, or misread as Zhao Rushi, was a Chinese historian and politician during the Song dynasty. He wrote a two-volume book titled '' Zhu Fan Zhi''. The book deals with the world known to the Chinese in ...
(趙汝适). The Javanese manuscript
Nagarakretagama
The ''Nagarakretagama'' or ''Nagarakṛtāgama'', also known as ''Desawarnana'' or ''Deśavarṇana'', is an Old Javanese eulogy to Hayam Wuruk, a Javanese king of the Majapahit Empire. It was written on lontar as a '' kakawin'' by Mpu Pr ...
, written by
Majapahit
Majapahit ( jv, ꦩꦗꦥꦲꦶꦠ꧀; ), also known as Wilwatikta ( jv, ꦮꦶꦭ꧀ꦮꦠꦶꦏ꧀ꦠ; ), was a Javanese Hindu-Buddhist thalassocratic empire in Southeast Asia that was based on the island of Java (in modern-day Indonesi ...
court poet
Mpu Prapanca
Mpu Prapanca wrote the ''Nagarakretagama'', written in Old Javanese, which tells the story of the Majapahit Kingdom and other stories of ancient Hindu- Javanese kingdoms. The Buddhist monk Prapanca wrote the chronicle in 1365 (or 1287 Saka ye ...
in 1365, mentioned the island as ''Nusa Tanjungnagara'', which means the island of the
Tanjungpura Kingdom
Tanjungpura Kingdom was the name of an ancient 8th century kingdom that was located along the southwestern coast of Borneo facing the Java Sea, a region that today corresponds to the Ketapang Regency of West Kalimantan province of Indonesia.
Na ...
. Nevertheless, the same manuscript also mentioned ''Barune'' (Brunei) and other polities on the island.
Geography
Geology

Borneo was formed through
Mesozoic
The Mesozoic Era ( ), also called the Age of Reptiles, the Age of Conifers, and colloquially as the Age of the Dinosaurs is the second-to-last era of Earth's geological history, lasting from about , comprising the Triassic, Jurassic and Creta ...
accretion of microcontinental fragments,
ophiolite
An ophiolite is a section of Earth's oceanic crust and the underlying upper mantle that has been uplifted and exposed above sea level and often emplaced onto continental crustal rocks.
The Greek word ὄφις, ''ophis'' (''snake'') is found ...
terranes and
island arc
Island arcs are long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries. Most island arcs originate on oceanic crust and have resulted from the descent of the lithosphere into the mantle alo ...
crust onto a
Paleozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon.
The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838
by combining the Greek words ''palaiós'' (, "old") and ' ...
continental core. At the beginning of the
Cenozoic
The Cenozoic ( ; ) is Earth's current geological era, representing the last 66million years of Earth's history. It is characterised by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configu ...
Borneo formed a
promontory
A promontory is a raised mass of land that projects into a lowland or a body of water (in which case it is a peninsula). Most promontories either are formed from a hard ridge of rock that has resisted the erosive forces that have removed the soft ...
of
Sundaland
Sundaland (also called Sundaica or the Sundaic region) is a biogeographical region of South-eastern Asia corresponding to a larger landmass that was exposed throughout the last 2.6 million years during periods when sea levels were lower. It ...
which partly separated from Asian mainland by the
proto-South China Sea.
The oceanic part of the proto-South China Sea was
subducted
Subduction is a geological process in which the oceanic lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the ...
during the
Paleogene
The Paleogene ( ; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (Mya) to the beginning of ...
period and a large
accretionary complex
An accretionary wedge or accretionary prism forms from sediments accreted onto the non- subducting tectonic plate at a convergent plate boundary. Most of the material in the accretionary wedge consists of marine sediments scraped off from the ...
formed along the northwestern of the island of Borneo. In the
early Miocene
The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene Epoch made up of two stages: the Aquitanian and Burdigalian stages.
The sub-epoch lasted from 23.03 ± 0.05 Ma to 15.97 ± 0.05 Ma (million years ago). It was p ...
uplift of the accretionary complex occurred as a result of underthrusting of thinned continental crust in northwest.
The uplift may have also resulted from shortening due to the counter-clockwise rotation of Borneo between 20 and 10
mega-annum
A year or annus is the orbital period of a planetary body, for example, the Earth, moving in its orbit around the Sun. Due to the Earth's axial tilt, the course of a year sees the passing of the seasons, marked by change in weather, the hou ...
(Ma) as a consequence of
Australia-Southeast Asia collision.
Large volumes of
sediment
Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, sa ...
were shed into basins, which scattered offshore to the west, north and east of Borneo as well into a
Neogene
The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period Mya. ...
basin which is currently exposed in large areas of eastern and southern
Sabah
Sabah () is a state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory ...
. In southeast Sabah, the
Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" ...
to recent island arc terranes of the
Sulu Archipelago extend onshore into Borneo with the older
volcanic arc
A volcanic arc (also known as a magmatic arc) is a belt of volcanoes formed above a subducting oceanic tectonic plate,
with the belt arranged in an arc shape as seen from above. Volcanic arcs typically parallel an oceanic trench, with the arc ...
was the result of southeast dipping subduction while the younger volcanics are likely resulted from northwest dipping subduction the
Celebes Sea
The Celebes Sea, (; ms, Laut Sulawesi, id, Laut Sulawesi, fil, Dagat Selebes) or Sulawesi Sea, of the western Pacific Ocean is bordered on the north by the Sulu Archipelago and Sulu Sea and Mindanao Island of the Philippines, on the east b ...
.

Before sea levels rose at the end of the
last ice age, Borneo was part of the mainland of Asia, forming, with
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
and
Sumatra, the upland regions of a peninsula that extended east from present day
Indochina
Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...
. The
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
and
Gulf of Thailand
The Gulf of Thailand, also known as the Gulf of Siam, is a shallow inlet in the southwestern South China Sea, bounded between the southwestern shores of the Indochinese Peninsula and the northern half of the Malay Peninsula. It is around in l ...
now submerge the former low-lying areas of the peninsula. Deeper waters separating Borneo from neighbouring
Sulawesi prevented a land connection to that island, creating the divide known as
Wallace's Line
The Wallace Line or Wallace's Line is a faunal boundary line drawn in 1859 by the British naturalist Alfred Russel Wallace and named by English biologist Thomas Henry Huxley that separates the biogeographical realms of Asia and Wallacea, a tran ...
between Asian and Australia-
New Guinea
New Guinea (; Hiri Motu: ''Niu Gini''; id, Papua, or , historically ) is the world's second-largest island with an area of . Located in Oceania in the southwestern Pacific Ocean, the island is separated from Australia by the wide Torr ...
biological regions. The island today is surrounded by the
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by the shores of South China (hence the name), in the west by the Indochinese Peninsula, in the east by the islands of Taiwan and northwestern Phil ...
to the north and northwest, the
Sulu Sea
The Sulu Sea ( fil, Dagat Sulu; Tausug: ''Dagat sin Sūg''; Chavacano: ''Mar de Sulu''; Cebuano: ''Dagat sa Sulu''; Hiligaynon: ''Dagat sang Sulu''; Karay-a: ''Dagat kang Sulu''; Cuyonon: ''Dagat i'ang Sulu''; ms, Laut Sulu) is a body ...
to the northeast, the Celebes Sea and the
Makassar Strait
Makassar Strait is a strait between the islands of Borneo and Sulawesi in Indonesia. To the north it joins the Celebes Sea, while to the south it meets the Java Sea. To the northeast, it forms the Sangkulirang Bay south of the Mangkalihat Pe ...
to the east, and the
Java Sea and
Karimata Strait
The Karimata Strait (alternatively, Carimata or Caramata; id, Selat Karimata) is a wide strait that connects the South China Sea to the Java Sea, separating the Indonesian islands of Belitung to the west and Borneo (Kalimantan) to the east. ...
to the south. To the west of Borneo are the
Malay Peninsula
The Malay Peninsula ( Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The are ...
and
Sumatra. To the south and east are islands of Indonesia:
Java
Java (; id, Jawa, ; jv, ꦗꦮ; su, ) is one of the Greater Sunda Islands in Indonesia. It is bordered by the Indian Ocean to the south and the Java Sea to the north. With a population of 151.6 million people, Java is the world's mo ...
and
Sulawesi, respectively. To the northeast are the
Philippine Islands
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
. With an area of , it is the third-largest island in the world, and is the largest island of
Asia
Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an ...
(the largest continent). Its highest point is
Mount Kinabalu
Mount Kinabalu ( ms, Gunung Kinabalu, Dusun: ''Gayo Ngaran or Nulu Nabalu'') is the highest mountain in Borneo and Malaysia. With an elevation of , it is third-highest peak of an island on Earth, and 20th most prominent mountain in the worl ...
in Sabah, Malaysia, with an elevation of .

The largest river system is the
Kapuas in
West Kalimantan
West Kalimantan ( id, Kalimantan Barat) is a province of Indonesia. It is one of five Indonesian provinces comprising Kalimantan, the Indonesian part of the island of Borneo. Its capital city is Pontianak. The province has an area of 147,307& ...
, with a length of .
Other major rivers include the
Mahakam in
East Kalimantan
East Kalimantan (Indonesian: ) is a province of Indonesia. Its territory comprises the eastern portion of Borneo. It had a population of about 3.03 million at the 2010 census (within the current boundary), 3.42 million at the 2015 census, and 3 ...
( long), the
Barito,
Kahayan, and
Mendawai in
South Kalimantan
South Kalimantan ( id, Kalimantan Selatan) is a province of Indonesia. It is the smallest province in Kalimantan, the Indonesian territory of Borneo. The provincial capital was Banjarmasin until 15 February 2022 when it was legally moved to B ...
(, , and long respectively),
Rajang in Sarawak ( long) and
Kinabatangan
Kinabatangan ( ms, Pekan Kinabatangan) is the capital of the Kinabatangan District in the Sandakan Division of Sabah, Malaysia. Its population was estimated to be around 10,256 in 2010. Kinabatangan is mostly populated with the Orang Sunga ...
in Sabah ( long). Borneo has significant cave systems. In Sarawak, the Clearwater Cave has one of the world's longest underground rivers while
Deer Cave
Deer Cave ( ms, Gua Rusa), located near Miri, Sarawak, Malaysia, is a show cave attraction of Gunung Mulu National Park. It was surveyed in 1961 by G. E. Wilford of the British Borneo Geological Survey, who predicted that Mulu would yield many ...
is home to over three million
bats, with
guano
Guano (Spanish from qu, wanu) is the accumulated excrement of Seabird, seabirds or bats. As a manure, guano is a highly effective fertilizer due to the high content of nitrogen, phosphate, and potassium, all key nutrients essential for plant ...
accumulated to over deep. The
Gomantong Caves
The Gomantong Caves are an intricate cave system inside Gomantong Hill in Sandakan Division, Sabah, Malaysia. The hill is the largest limestone outcrop in the Lower Kinabatangan area.
Description
Situated in the Gomantong Forest Reserve, the c ...
in Sabah has been dubbed as the "Cockroach Cave" due to the presence of millions of cockroaches inside the cave. The
Gunung Mulu National Park
The Gunung Mulu National Park is a national park in Miri Division, Sarawak, Malaysia. It is a UNESCO World Heritage Site that encompasses caves and karst formations in a mountainous equatorial rainforest setting. The park is famous for its c ...
in Sarawak and
Sangkulirang-Mangkalihat Karst
The Sangkulirang-Mangkalihat Karst is a karstique area in Sub Kelay, Biatan, Talisayan, Batu Putih, and Biduk-biduk Berau districts of East Kalimantan province on the island of Borneo in Indonesia. It covers an area of 105,000 hectares, includin ...
in East Kalimantan which particularly a
karst areas contains thousands of smaller caves.
Ecology

The Borneo
rainforest
Rainforests are characterized by a closed and continuous tree canopy, moisture-dependent vegetation, the presence of epiphytes and lianas and the absence of wildfire. Rainforest can be classified as tropical rainforest or temperate rainfo ...
is estimated to be around 140 million years old, making it one of the oldest rainforests in the world. It is the centre of the evolution and distribution of many
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found els ...
species of plants and animals, and the rainforest is one of the few remaining
natural habitats for the endangered
Bornean orangutan
The Bornean orangutan (''Pongo pygmaeus'') is a species of orangutan endemic to the island of Borneo. Together with the Sumatran orangutan (''Pongo abelii'') and Tapanuli orangutan (''Pongo tapanuliensis''), it belongs to the only genus of grea ...
. It is an important refuge for many endemic forest species, including the
Borneo elephant
The Borneo elephant, also called the Bornean elephant or the Borneo pygmy elephant, is a subspecies of Asian elephant ''(Elephas maximus)'' that inhabits northeastern Borneo, in Indonesia and Malaysia. Its origin remains the subject of debate. ...
, the
eastern Sumatran rhinoceros
The Bornean rhinoceros (''Dicerorhinus sumatrensis harrissoni''), also known as the eastern Sumatran rhinoceros or eastern hairy rhinoceros, is one of three subspecies of Sumatran rhinoceros. The subspecies may be functionally extinct, with only ...
, the
Bornean clouded leopard
The Bornean clouded leopard (''Neofelis diardi borneensis'') is a subspecies of the Sunda clouded leopard. It is native to the island of Borneo, and differs from the Batu-Sumatran clouded leopard in the shape and frequency of spots, as well as ...
, the
Bornean rock frog, the
hose's palm civet
Hose's palm civet (''Diplogale hosei''), also known as Hose's civet, is a viverrid species endemic to the island of Borneo. It is listed on the IUCN Red List as Vulnerable because of an ongoing population decline, estimated to be more than 30% ov ...
and the
dayak fruit bat.
Peat swamp forests
Peat swamp forests are tropical moist forests where waterlogged soil prevents dead leaves and wood from fully decomposing. Over time, this creates a thick layer of acidic peat. Large areas of these forests are being logged at high rates.
Pea ...
occupy the entire coastline of Borneo. The soil of the peat swamp is comparatively infertile, while it is known to be the home of various bird species such as the
hook-billed bulbul
The hook-billed bulbul (''Setornis criniger'') is a species of songbird in the bulbul family, Pycnonotidae. It is found in eastern Sumatra and Borneo, where its natural habitats are subtropical or tropical moist lowland forest and subtropical o ...
,
helmeted hornbill
The helmeted hornbill (''Rhinoplax vigil'') is a very large bird in the hornbill family. It is found on the Malay Peninsula, Sumatra, Borneo, Thailand and Myanmar. The casque (helmetlike structure on the head) accounts for some 11% of its 3  ...
and
rhinoceros hornbill
The rhinoceros hornbill (''Buceros rhinoceros'') is a large species of forest hornbill (Bucerotidae). In captivity it can live for up to 35 years. It is found in lowland and montane, tropical and subtropical climates and in mountain rain forests ...
.
There are about 15,000 species of
flowering plant
Flowering plants are plants that bear flowers and fruits, and form the clade Angiospermae (), commonly called angiosperms. They include all forbs (flowering plants without a woody stem), grasses and grass-like plants, a vast majority of ...
s with 3,000 species of trees (267 species are
dipterocarp
Dipterocarpaceae is a family of 16 genera and about 695 known species of mainly tropical lowland rainforest trees. The family name, from the type genus ''Dipterocarpus'', is derived from Greek (''di'' = two, ''pteron'' = wing and ''karpos'' = fru ...
s), 221 species of terrestrial mammals and 420 species of resident birds in Borneo. There are about 440 freshwater fish species in Borneo (about the same as Sumatra and Java combined). The
Borneo river shark
The Ganges shark (''Glyphis gangeticus'') is a critically endangered species of requiem shark found in the Ganges River (Padma River) and the Brahmaputra River of Bangladesh and India. It is often confused with the more common bull shark (''Car ...
is known only from the
Kinabatangan River
The Kinabatangan River ( ms, Sungai Kinabatangan) is a river in Sandakan Division, in northeastern Sabah, Malaysia. It is the second longest river in Malaysia, with a length of from its headwaters in the mountains of southwest Sabah, to its out ...
. In 2010, the
World Wide Fund for Nature
The World Wide Fund for Nature Inc. (WWF) is an international non-governmental organization founded in 1961 that works in the field of wilderness preservation and the reduction of human impact on the environment. It was formerly named the Wor ...
(WWF) stated that 123 species have been discovered in Borneo since the "
Heart of Borneo
The Heart of Borneo is a conservation agreement initiated by the World Wide Fund for Nature to protect a 220,000 km² forested region on Borneo island. The agreement was signed by the governments of Brunei, Indonesia and Malaysia in Bali on 1 ...
" agreement was signed in 2007.
The WWF has classified the island into seven distinct
ecoregion
An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas o ...
s. Most are lowland regions:
*
Borneo lowland rain forests
The Borneo lowland rain forests is an ecoregion, within the tropical and subtropical moist broadleaf forests biome, of the large island of Borneo in Southeast Asia. It supports approximately 15,000 plant species, 380 bird species and several m ...
cover most of the island, with an area of ;
*
Borneo peat swamp forests
The Borneo peat swamp forests ecoregion, within the tropical and subtropical moist broadleaf forests biome, are on the island of Borneo, which is divided between Brunei, Indonesia and Malaysia.
Location and description
Peat swamp forests occur ...
;
* ''
Kerangas
The Sundaland heath forest, also known as ''Kerangas'' forest, is a type of tropical moist forest found on the island of Borneo, which is divided between Brunei, Indonesia, and Malaysia, as well as on the Indonesian islands of Belitung and Bangk ...
'' or Sundaland heath forests;
* Southwest Borneo freshwater swamp forests; and
*
Sunda Shelf mangroves
The Sunda Shelf mangroves ecoregion, in the mangrove biome, are on the coasts of the islands of Borneo and eastern Sumatra in Malaysia and Indonesia. They are home to the proboscis monkey.
As well as being an important habitat for terrestrial ...
.
* The
Borneo montane rain forests
The Borneo montane rain forests are an ecoregion, of cloud forest, within the tropical and subtropical moist broadleaf forests biome, of the island of Borneo in Southeast Asia.
Location and description
This ecoregion consists of tropical mount ...
lie in the central highlands of the island, above the elevation.
*The
Tropical and subtropical grasslands, savannas, and shrublands
Tropical and subtropical grasslands, savannas, and shrublands is a terrestrial biome defined by the World Wide Fund for Nature. The biome is dominated by grass and/or shrubs located in semi-arid to semi-humid climate regions of subtropical an ...
on South Kalimantan.
The highest elevations of
Mount Kinabalu
Mount Kinabalu ( ms, Gunung Kinabalu, Dusun: ''Gayo Ngaran or Nulu Nabalu'') is the highest mountain in Borneo and Malaysia. With an elevation of , it is third-highest peak of an island on Earth, and 20th most prominent mountain in the worl ...
are home to the Kinabalu mountain
alpine meadow
Alpine tundra is a type of natural region or biome that does not contain trees because it is at high elevation, with an associated harsh climate. As the latitude of a location approaches the poles, the threshold elevation for alpine tundra gets ...
, an alpine shrubland notable for its numerous endemic species, including many orchids.
According to analysis of data from
Global Forest Watch
Global Forest Watch (GFW) is an open-source web application to monitor global forests in near real-time. GFW is an initiative of the World Resources Institute (WRI), with partners including Google, USAID, the University of Maryland (UMD), Esri, ...
, the Indonesian portion of Borneo lost 10.7 million hectares of tree cover between 2002 and 2019, of which 4 million hectares was
primary forest
An old-growth forestalso termed primary forest, virgin forest, late seral forest, primeval forest, or first-growth forestis a forest that has attained great age without significant disturbance, and thereby exhibits unique ecological featur ...
, compared with Malaysian Borneo's 4.4 million hectares of tree cover loss and 1.9 million hectares of primary forest cover loss. As of 2020, Indonesian Borneo accounts for 72% of the island's tree cover, Malaysian Borneo 27%, and Brunei 1%. Primary forest in Indonesia accounts for 44% of Borneo's overall tree cover.
Conservation issues

The island historically had extensive rainforest cover, but the area was reduced due to heavy
logging by the Indonesian and Malaysian wood industry, especially with the large demands of raw materials from
industrial countries along with the conversion of forest lands for large-scale agricultural purposes.
Half of the annual global
tropical timber
Tropical timber may refer to any type of timber or wood that grows in tropical rainforests and tropical and subtropical moist broadleaf forests and is harvested there. Typical examples of worldwide industrial significance include, among others, t ...
acquisition comes from Borneo.
Palm oil
Palm oil is an edible vegetable oil derived from the mesocarp (reddish pulp) of the fruit of the oil palms. The oil is used in food manufacturing, in beauty products, and as biofuel. Palm oil accounted for about 33% of global oils produced fr ...
plantations have been widely developed and are rapidly encroaching on the last remnants of primary rainforest.
Forest fires
A wildfire, forest fire, bushfire, wildland fire or rural fire is an unplanned, uncontrolled and unpredictable fire in an area of combustible vegetation. Depending on the type of vegetation present, a wildfire may be more specifically identi ...
since 1997, started by the locals to clear the forests for plantations were exacerbated by an exceptionally dry
El Niño
El Niño (; ; ) is the warm phase of the El Niño–Southern Oscillation (ENSO) and is associated with a band of warm ocean water that develops in the central and east-central equatorial Pacific (approximately between the International Date ...
season, worsening the annual shrinkage of the rainforest. During these fires, hotspots were visible on
satellite images
Satellite images (also Earth observation imagery, spaceborne photography, or simply satellite photo) are images of Earth collected by imaging satellites operated by governments and businesses around the world. Satellite imaging companies sell im ...
and the resulting
haze
Haze is traditionally an atmospheric phenomenon in which dust, smoke, and other dry particulates suspended in air obscure visibility and the clarity of the sky. The World Meteorological Organization manual of codes includes a classification ...
frequently affected Brunei, Indonesia and Malaysia. The haze could also reach southern
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is b ...
,
Cambodia
Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailan ...
,
Vietnam
Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making it ...
and the
Philippines
The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no),
* bik, Republika kan Filipinas
* ceb, Republika sa Pilipinas
* cbk, República de Filipinas
* hil, Republ ...
as evidenced on the
2015 Southeast Asian haze
The 2015 Southeast Asian haze was an air pollution crisis affecting several countries in Southeast Asia, including Brunei, Indonesia (especially its islands of Sumatra and Borneo), Malaysia, Singapore, southern Thailand, Vietnam, Cambodia and ...
.
The orchid
Mycaranthes farinosa
''Mycaranthes'' is a genus of orchids. It was previously considered as a synonym of the genus '' Eria'', but eventually it has become an accepted name. Its species are native to Southeast Asia, China, the Himalayas and New Guinea.
Species
...
is specific to this island
Topography
List of highest peaks in Borneo by elevation.
*
Mount Kinabalu
Mount Kinabalu ( ms, Gunung Kinabalu, Dusun: ''Gayo Ngaran or Nulu Nabalu'') is the highest mountain in Borneo and Malaysia. With an elevation of , it is third-highest peak of an island on Earth, and 20th most prominent mountain in the worl ...
*
Mount Trusmadi
Mount Trusmadi or Trus Madi ( ms, Gunung Trusmadi) is a mountain located at the Interior Division of Sabah, Malaysia. It is considered as the second highest mountain in both Sabah and Malaysia at , after Mount Kinabalu with Trusmadi offering a ...
*
Bukit Raya Bukit, the Indonesian or Malay word for hill, may refer to:
* Bukit Peninsula, area in Bali, Indonesia
* Kampong Bukit
Kampong Bukit is a remote village in Tutong District, Brunei, about from the district town Pekan Tutong. The population was 6 ...
*
Muruk Miau
Muruk ( fa, موروك, also Romanized as Mūrūk; also known as Marūk, Merūk, Morūk, Mowrak, and Mūrak) is a village in Vardasht Rural District, in the Central District of Semirom County, Isfahan Province, Iran
Iran, officiall ...
*
Mount Wakid
Mount is often used as part of the name of specific mountains, e.g. Mount Everest.
Mount or Mounts may also refer to:
Places
* Mount, Cornwall, a village in Warleggan parish, England
* Mount, Perranzabuloe, a hamlet in Perranzabuloe parish ...
*
Monkobo Hill
*
Mount Lotung
Mount is often used as part of the name of specific mountains, e.g. Mount Everest.
Mount or Mounts may also refer to:
Places
* Mount, Cornwall, a village in Warleggan parish, England
* Mount, Perranzabuloe, a hamlet in Perranzabuloe parish, C ...
*
Mount Magdalena
Mount Magdalena ( ms, Gunung Magdalena) is a volcanic cone mountain located at the Tawau Division of Sabah, Malaysia. It reaches a height of approximately .
History
Since 1979, it has been a part of the Tawau Hills Park. Jungle trekking ...
*
Talibu Hill
River systems
List of longest river in Borneo by length.
*
Kapuas River
The Kapuas River (or Kapoeas River) is a river in the Indonesian part of Borneo island, at the geographic center of Maritime Southeast Asia. At in length, it is the longest river in the island of Borneo and the longest river of IndonesiaMacK ...
*
Barito River
The Barito River is the second longest river in Borneo after the Kapuas River with a total length of and with a drainage basin of in South Kalimantan, Indonesia. It originates in the Muller Mountain Range, from where it flows southward in ...
*
Mahakam River
The Mahakam River (Indonesian: ''Sungai Mahakam'') is third longest and volume discharge river in Borneo after Kapuas River and Barito River, it is located in Kalimantan, Indonesia. It flows from the district of Long Apari in the highlands of ...
*
Rajang River
The Rajang River ( ms, Batang Rajang) is a river in Sarawak, northwest Borneo, Malaysia. The river originates in the Iran Mountains, flows through Kapit, and then towards the South China Sea. At approximately , the river is the seventh-longest i ...
*
Kahayan River
*
Mendawai River
Mendawai River or Katingan River is a river of Borneo, it is located in Central Kalimantan, Indonesia. With a total length of . The longhouses of the Pendahara are located along the river in its upper course. The river has its source in the Schw ...
*
Kayan River
The Kayan River is a river of Borneo island, flowing in the North Kalimantan province of Indonesia, about 1600 km northeast of the capital Jakarta. Tributaries include the Bahau River.
Hydrology
The Kayan River rises on Mount Ukeng, pass ...
*
Kinabatangan River
The Kinabatangan River ( ms, Sungai Kinabatangan) is a river in Sandakan Division, in northeastern Sabah, Malaysia. It is the second longest river in Malaysia, with a length of from its headwaters in the mountains of southwest Sabah, to its out ...
*
Baram River
The Baram River ( ms, Sungai Baram) is a river in Sarawak on the island of Borneo. The river originates in the Kelabit Highlands, a watershed demarcated by the Iran Mountains of East Kalimantan, which form a natural border with Sarawak. The river ...
*
Sembakung River
The Sembakung River is a river of Borneo, in the province of North Kalimantan, Indonesia, about 1600 km northeast of the capital Jakarta.Sesayap River
Sesayap River is a river in Borneo island, flowing in North Kalimantan Province, Indonesia.Sungai Sesayap
at Ge ...
*
Pawan River
Pawan River is a major river of West Kalimantan, Indonesia. It has a length of . Tributaries include the Keriau River.
Hydrology
In its mid course Pawan River passes through the little town of Tandjoengpoera (Tanjungpura). Pawan River passes t ...
History
Early history

In November 2018, scientists reported the discovery of the oldest known
figurative art painting, over 40,000 (perhaps as old as 52,000) years old, of an unknown animal, in the cave of
Lubang Jeriji Saléh
Lubang Jeriji Saleh is a limestone cave complex in Indonesia in the Sangkulirang-Mangkalihat Karst located in the remote jungle of Bengalon district in East Kutai, East Kalimantan province on Borneo island. In a 2018 publication a team of resea ...
on the island of Borneo.
According to ancient Chinese (977), Indian and Japanese manuscripts, western coastal cities of Borneo had become trading ports by the first millennium AD. In Chinese manuscripts, gold,
camphor
Camphor () is a waxy, colorless solid with a strong aroma. It is classified as a terpenoid and a cyclic ketone. It is found in the wood of the camphor laurel ('' Cinnamomum camphora''), a large evergreen tree found in East Asia; and in the k ...
,
tortoise
Tortoises () are reptiles of the family Testudinidae of the order Testudines (Latin: ''tortoise''). Like other turtles, tortoises have a shell to protect from predation and other threats. The shell in tortoises is generally hard, and like ot ...
shells, hornbill ivory, rhinoceros horn, Crane (bird), crane crest, beeswax, lakawood (a scented heartwood and root wood of a thick liana, ''Dalbergia parviflora''), dragon's blood, rattan, edible bird's nest soup, bird's nests and various spices were described as among the most valuable items from Borneo.
The demographics of India, Indians named Borneo ''Suvarnabhumi'' (the land of gold) and also ''Karpuradvipa'' (Camphor Island). The Javanese people, Javanese named Borneo ''Puradvipa'', or Diamond Island. Archaeological findings in the Sarawak river delta reveal that the area was a thriving centre of trade between India and China from the 6th century until about 1300.

Stone pillars bearing inscriptions in the Pallava script, found in Kutai along the
Mahakam River
The Mahakam River (Indonesian: ''Sungai Mahakam'') is third longest and volume discharge river in Borneo after Kapuas River and Barito River, it is located in Kalimantan, Indonesia. It flows from the district of Long Apari in the highlands of ...
in
East Kalimantan
East Kalimantan (Indonesian: ) is a province of Indonesia. Its territory comprises the eastern portion of Borneo. It had a population of about 3.03 million at the 2010 census (within the current boundary), 3.42 million at the 2015 census, and 3 ...
and dating to around the second half of the 4th century, constitute some of the oldest evidence of Hindu influence in Southeast Asia. By the 14th century, Borneo became a vassal state of
Majapahit
Majapahit ( jv, ꦩꦗꦥꦲꦶꦠ꧀; ), also known as Wilwatikta ( jv, ꦮꦶꦭ꧀ꦮꦠꦶꦏ꧀ꦠ; ), was a Javanese Hindu-Buddhist thalassocratic empire in Southeast Asia that was based on the island of Java (in modern-day Indonesi ...
(in present-day Indonesia), later changing its allegiance to the Ming dynasty of China. Pre-Islamic Sulu, then known locally as Lupah Sug, stretched from Palawan and the Sulu archipelago at the Philippines; to
Sabah
Sabah () is a state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory ...
, East Kalimantan, Eastern, and North Kalimantan, Northern Kalimantan in Borneo. The Sulu empire rose as a rebellion and reaction against former Majapahit Imperialism against Sulu which Majapahit briefly occupied. The religion of Islam entered the island in the 10th century, following the arrival of Muslim traders who later converted many indigenous peoples in the coastal areas.
The Sultanate of Brunei declared independence from Majapahit following the death of the Majapahit emperor in the mid-14th century. During its golden age under Bolkiah from the 15th to the 17th century, the Bruneian sultanate ruled almost the entire coastal area of Borneo (lending its name to the island due to its influence in the region) and several islands in the Philippines.
[ During the 1450s, Sharif ul-Hāshim of Sulu, Shari'ful Hashem Syed Abu Bakr, an Arab born in Johor, arrived in Sulu from Malacca. In 1457, he founded the Sultanate of Sulu; he titled himself as "Paduka Maulana Mahasari Sharif Sultan Hashem Abu Bakr". Following its independence in 1578 from Brunei's influence, Sulu began to expand its thalassocracy to parts of the northern Borneo.] Both the sultanates who ruled northern Borneo had traditionally engaged in trade with China by means of the frequently-arriving Chinese junk (ship), junks. Despite the thalassocracy of the sultanates, Borneo's interior region remained free from the rule of any kingdoms.
British and Dutch control
Since the Capture of Malacca (1511), fall of Malacca in 1511, Portuguese merchants traded regularly with Borneo, and especially with Brunei from 1530. Having visited Brunei's capital, the Portuguese described the place as surrounded by a stone wall. While Borneo was seen as rich, the Portuguese did not make any attempts to conquer it. The Spanish had sailed from Latin America and conquered the Brunei's provinces in the Philippines and incorporated it into the Mexico-Centered Viceroyalty of New Spain. The Spanish visit to Brunei led to the Castilian War in 1578. The English began to trade with Sultanate of Sambas, Sambas of southern Borneo in 1609, while the Dutch only began their trade in 1644: to Banjar and Martapura, also in the southern Borneo. The Dutch tried to settle the island of Balambangan Island, Balambangan, north of Borneo, in the second half of the 18th century, but withdrew by 1797. In 1812, the sultan in southern Borneo ceded his forts to the English East India Company. The English, led by Stamford Raffles, then tried to establish an intervention in Sambas but failed. Although they managed to defeat the sultanate the next year and declared a blockade on all ports in Borneo except Brunei, Banjarmasin and Pontianak, Indonesia, Pontianak, the project was cancelled by the British governor-general Gilbert Elliot-Murray-Kynynmound, 1st Earl of Minto, Lord Minto in India as it was too expensive. At the beginning of British and Dutch exploration on the island, they described the island of Borneo as full of headhunting, head hunters, with the indigenous in the interior practising cannibalism, and the waters around the island infested with piracy, pirates, especially between the north eastern Borneo and the southern Philippines. The Malay race, Malay and Iban people, Sea Dayak pirates preyed on maritime shipping in the waters between Singapore and Hong Kong from their haven in Borneo, along with the attacks by Illanuns of the Moro pirates from the southern Philippines, such as in the Battle off Mukah.
The Dutch began to intervene in the southern part of the island upon resuming contact in 1815, posting ''resident (title), residents'' to Banjarmasin, Pontianak and Sambas and ''assistant-residents'' to Landak and Mampawa. The Sultanate of Brunei in 1842 granted large parts of land in Sarawak to the English adventurer James Brooke, as a reward for his help in quelling a local rebellion. Brooke established the Raj of Sarawak and was recognised as its rajah after paying a fee to the sultanate. He established a monarchy, and the Brooke dynasty (through his nephew and great-nephew) ruled Sarawak for 100 years; the leaders were known as the White Rajahs. Brooke also acquired the island of Labuan
Labuan (), officially the Federal Territory of Labuan ( ms, Wilayah Persekutuan Labuan), is a Federal Territory of Malaysia. Its territory includes and six smaller islands, off the coast of the state of Sabah in East Malaysia. Labuan's capi ...
for United Kingdom of Great Britain and Ireland, Great Britain in 1846 through the Treaty of Labuan with the sultan of Brunei, Omar Ali Saifuddin II on 18 December 1846. The region of northern Borneo came under the administration of North Borneo Chartered Company following the acquisition of territory from the Sultanates of Brunei and Sulu by a German businessman and adventurer named Gustav Overbeck, Baron von Overbeck, before it was passed to the British Dent brothers (comprising Alfred Dent and Edward Dent). Further expansion by the British continued into the Borneo interior. This led the 26th sultan of Brunei, Hashim Jalilul Alam Aqamaddin to appeal the British to halt such efforts, and as a result a Treaty of Protection was signed in 1888, rendering Brunei a British protectorate.
Before the acquisition by the British, the Americans also managed to establish their temporary presence in northwestern Borneo after acquiring a parcel of land from the Sultanate of Brunei. A company known as American Trading Company of Borneo was formed by Joseph William Torrey, Thomas Bradley Harris and several Chinese investors, establishing a colony named "Ellena" in the Kimanis area. The colony failed and was abandoned, due to denials of financial backing, especially by the US government, and to diseases and riots among the workers. Before Torrey left, he managed to sell the land to the German businessman, Overbeck. Meanwhile, the Germans under William Frederick Schuck were awarded a parcel of land in northeastern Borneo of the Sandakan Bay from the Sultanate of Sulu where he conducted business and exported large quantities of arms, opium, textiles and tobacco to Sulu before the land was also passed to Overbeck by the sultanate.
Prior to the recognition of Spanish presence in the Philippine archipelago, a protocol known as the Madrid Protocol of 1885 was signed between the governments of the United Kingdom, Germany and Spain in Madrid to cement Spanish influence and recognise their sovereignty over the Sultanate of Sulu—in return for Spain's relinquishing its claim to the former possessions of the sultanate in northern Borneo. The British administration then established the first railway network in northern Borneo, known as the North Borneo Railway. During this time, the British sponsored a large number of Chinese workers to migrate to northern Borneo to work in European plantation and mines, and the Dutch followed suit to increase their economic production. By 1888, North Borneo, Sarawak and Brunei in northern Borneo had become British protectorate. The area in southern Borneo was made Dutch protectorate in 1891. The Dutch who already claimed the whole Borneo were asked by Britain to delimit their boundaries between the two colonial territories to avoid further conflicts. The British and Dutch governments had signed the Anglo-Dutch Treaty of 1824 to exchange trading ports in Malay Peninsula
The Malay Peninsula ( Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The are ...
and Sumatra that were under their controls and assert spheres of influence. This resulted in indirectly establishing British- and Dutch-controlled areas in the north (Malay Peninsula) and south (Sumatra and Riau Islands) respectively.
In 1895, Marcus Samuel, 1st Viscount Bearsted, Marcus Samuel received a concession in the Kutei area of east Borneo, and based on oil seepages in the Mahakam River
The Mahakam River (Indonesian: ''Sungai Mahakam'') is third longest and volume discharge river in Borneo after Kapuas River and Barito River, it is located in Kalimantan, Indonesia. It flows from the district of Long Apari in the highlands of ...
river delta, delta, Mark Abrahams struck oil in February 1897. This was the discovery of the Sanga Sanga Oil Field, a refinery was built in Balikpapan, and discovery of the Samboja Oil Field followed in 1909. In 1901, the Pamusian Oil Field was discovered on Tarakan, and the Bunyu Oil Field in 1929. Royal Dutch Shell discovered the Miri, Malaysia, Miri Oil Field in 1910, and the Seria oil field in 1929.
World War II
During World War II, Japanese forces gained control and occupied most areas of Borneo from 1941 to 1945. In the first stage of the war, the British saw the Japanese advance to Borneo as motivated by political and territorial ambitions rather than economic factors. The occupation drove many people in the coastal towns to the interior, searching for food and escaping the Japanese. The Chinese residents in Borneo, especially with the Second Sino-Japanese War, Sino-Japanese War in Mainland China mostly resisted the Japanese occupation. Following the formation of resistance movements in northern Borneo such as the Jesselton Revolt, many innocent indigenous and Chinese people were executed by the Japanese for their alleged involvement.
In Kalimantan, the Japanese also killed many Malay intellectuals, executing all the Malay sultans of West Kalimantan in the Pontianak incidents, together with Chinese people who were already against the Japanese for suspecting them to be threats.[ Sultan Muhammad Ibrahim Shafi ud-din II of Sultanate of Sambas, Sambas was executed in 1944. The sultanate was thereafter suspended and replaced by a Japanese council. The Japanese also set-up ''Pusat Tenaga Rakjat'' (PUTERA) in the Indonesian archipelago in 1943, although it was abolished the following year when it became too nationalistic.] Some of the Indonesian nationalist like Sukarno and Mohammad Hatta, Hatta who had returned from Dutch exile began to co-operate with the Japanese. Shortly after his release, Sukarno became president of the Central Advisory Council, an advisory council for south Borneo, Celebes Islands, Celebes, and Lesser Sunda Islands, Lesser Sunda, set up in February 1945.
Since the fall of Singapore, the Japanese sent several thousand of British and Australian prisoners of war to camps in Borneo such as Batu Lintang camp. From the Sandakan camp site, only six of some 2,500 prisoners survived after they were forced to march in an event known as the Sandakan Death March. In addition, of the total of 17,488 Javanese people, Javanese labourers brought in by the Japanese during the occupation, only 1,500 survived mainly due to starvation, harsh working conditions and maltreatment. The Dayak and other indigenous people played a role in guerrilla warfare against the occupying forces, particularly in the Kapit Division. They temporarily revived headhunting of Japanese toward the end of the war, with Allied Z Special Unit provided assistance to them. Australia contributed significantly to the liberation of Borneo. The Second Australian Imperial Force, Australian Imperial Force was sent to Borneo to fight off the Japanese. Together with other Allies, the island Borneo campaign (1945), was completely liberated in 1945.
Recent history
In May 1945, officials in Tokyo suggested that whether northern Borneo should be included in the proposed new country of Indonesia should be separately determined based on the desires of its indigenous people and following the disposition of British Malaya, Malaya. Sukarno and Mohammad Yamin meanwhile continuously advocated for a Greater Indonesian republic. Towards the end of the war, Japan decided to give an early independence to a new proposed country of Indonesia on 17 July 1945, with an Independence Committee meeting scheduled for 19 August 1945. However, following the surrender of Japan to the Allied forces, the meeting was shelved. Sukarno and Hatta continued the plan by unilaterally declaring independence, although the Dutch tried to retake their colonial possession in Borneo. The southern part of the island achieved its independence through the Proclamation of Indonesian Independence on 17 August 1945. The southern part saw Kalimantan Physical Revolution, guerilla conflicts followed by Dutch blockade to cut supplies for nationalist within the region. While nationalist guerrillas supporting the inclusion of southern Borneo in the new Indonesian republic were active in Ketapang, and to lesser extent in Sambas where they rallied with the red-white flag which became the flag of Indonesia, most of the Chinese residents in southern Borneo expected to be liberated by National Revolutionary Army, Chinese Nationalist troops from mainland China and to integrate their districts as an overseas province of Republic of China (1912–49), China. Meanwhile, Sarawak and Sabah in northern Borneo became separate British crown colonies in 1946.
In 1961, Prime Minister Tunku Abdul Rahman of the independent Federation of Malaya desired to unite Malaya, the British colonies of Crown Colony of Sarawak, Sarawak, Crown Colony of North Borneo, North Borneo, Crown Colony of Singapore, Singapore and the protectorate of Brunei
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...
under the proposed Malaysia, Federation of Malaysia. The idea was heavily opposed by the governments in both Indonesia and the Philippines as well from communist sympathisers and nationalists in Borneo. Sukarno, as the president of the new republic, perceiving the British trying to maintain their presence in northern Borneo and the Malay Peninsula, decided to launch a military infiltration, later known as the ''Indonesia–Malaysia confrontation, confrontation'', from 1962 to 1969. As a response to the growing opposition, the British deployed their armed forces to guard their colonies against Indonesian and communist revolts, which was also participated by Australia and New Zealand.
The Philippines opposed the newly proposed federation, claiming the eastern part of North Borneo (today the Malaysian state of Sabah) as part of its territory as a former possession of the Sultanate of Sulu. The Philippine government mostly based their claim on the Sultanate of Sulu's cession agreement with the British North Borneo Company, as by now the sultanate had come under the jurisdiction of the Philippine republican administration, which therefore should inherit the Sulu former territories. The Philippine government also claimed that the heirs of the sultanate had ceded all their territorial rights to the republic.
The Sultanate of Brunei at the first welcomed the proposal of a new larger federation. Meanwhile, the Brunei People's Party led by A.M. Azahari desired to reunify Brunei, Sarawak and North Borneo into one federation known as the North Borneo Federation ( ms, Kesatuan Negara Kalimantan Utara), where the List of sultans of Brunei, sultan of Brunei would be the head of state for the federation—though Azahari had his own intention to abolish the Brunei monarchy, to make Brunei more democratic, and to integrate the territory and other former British colonies in Borneo into Indonesia, with the support from the latter government. This directly led to the Brunei Revolt, which thwarted Azahari's attempt and forced him to escape to Indonesia. Brunei withdrew from being part of the new Federation of Malaysia due to some disagreements on other issues while political leaders in Sarawak and North Borneo continued to favour inclusion in a larger federation.
With the continuous opposition from Indonesia and the Philippines, the Cobbold Commission was established to discover the feeling of the native populations in northern Borneo; it found the people greatly in favour of federation, with various stipulations. The federation was successfully achieved with the inclusion of northern Borneo through the Malaysia Agreement on 16 September 1963. To this day, the area in northern Borneo is still subjected to attacks by Moro pirates since the 18th century and militant from groups such as Abu Sayyaf since 2000 in the frequent Cross border attacks in Sabah, cross border attacks. During the administration of Philippine president Ferdinand Marcos, Marcos made some attempts to destabilise the state of Sabah, although his plan failed and resulted in the Jabidah massacre and later the Moro conflict, insurgency in the southern Philippines.
In August 2019, Indonesian president Joko Widodo announced a Capital of Indonesia#Move to East Kalimantan, plan to move the capital of Indonesia from Jakarta to a newly established location in the East Kalimantan
East Kalimantan (Indonesian: ) is a province of Indonesia. Its territory comprises the eastern portion of Borneo. It had a population of about 3.03 million at the 2010 census (within the current boundary), 3.42 million at the 2015 census, and 3 ...
province in Borneo.
Demographics
The demonym for Borneo is Bornean.
Borneo had 23,053,723 inhabitants (in 2020 Censuses), a population density of . Most of the population lives in coastal cities, although the hinterland has small towns and villages along the rivers. The population consists mainly of Dayak people, Dayak ethnic groups, Malays (ethnic group), Malay, Banjar people, Banjar, Ida'an, Bajau, Tausūg people, Suluk, Orang Ulu, Han Chinese, Chinese and Kadazan-Dusun. The Overseas Chinese, Chinese, who make up 29% of the population of Sarawak
Sarawak (; ) is a state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the Malaysian state of Sabah to the northeast, ...
and 17% of total population in West Kalimantan
West Kalimantan ( id, Kalimantan Barat) is a province of Indonesia. It is one of five Indonesian provinces comprising Kalimantan, the Indonesian part of the island of Borneo. Its capital city is Pontianak. The province has an area of 147,307& ...
, Indonesia are descendants of immigrants primarily from southeastern China.
In Sabah, during the administration of Mustapha Harun of the United Sabah National Organisation (USNO) in the 1970s, thousands of Muslim immigrants and refugees from the southern Philippines island of Mindanao and the island of Sulawesi in Indonesia were given sanctuary and later identity cards in a bid to increase the Muslim population of the state: a policy later known as Project IC. Due to the high number of crimes attributed to the new migrant populations, ethnic tension between the indigenous and migrant populations has risen up to the present.
In Kalimantan, since the 1990s, the Indonesian government has undertaken an intense transmigration program; to that end it has financed the relocation of poor, landless families from Java, Madura, and Bali. By 2001, transmigrants made up 21% of the population in Central Kalimantan. Since the 1990s, the indigenous Dayak and Malays have resisted encroachment by these migrants, and violent conflict has occurred between some transmigrant and indigenous populations. In the 1999 Sambas riots, Dayak people, Dayaks and Ethnic Malays, Malays joined to massacre thousands of the Madurese people, Madurese migrants. In Kalimantan, thousands were killed in 2001 fighting between Madurese transmigrants and the Dayak people in the Sampit conflict.
Religion
Administration
The island of Borneo is divided administratively by three countries.
* The independent sultanate of Brunei
Brunei ( , ), formally Brunei Darussalam ( ms, Negara Brunei Darussalam, Jawi alphabet, Jawi: , ), is a country located on the north coast of the island of Borneo in Southeast Asia. Apart from its South China Sea coast, it is completely sur ...
(main part and eastern exclave of Temburong District, Temburong)
* The Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
n Provinces of Indonesia, provinces of East Kalimantan, East, South Kalimantan, South, West Kalimantan, West, North Kalimantan, North and Central Kalimantan, in Kalimantan
Kalimantan () is the Indonesian portion of the island of Borneo. It constitutes 73% of the island's area. The non-Indonesian parts of Borneo are Brunei and East Malaysia. In Indonesia, "Kalimantan" refers to the whole island of Borneo.
In 2019, ...
* The East Malaysia
East Malaysia (), or the Borneo States, also known as Malaysian Borneo, is the part of Malaysia on and near the island of Borneo, the world's third-largest island. Near the coast of Sabah is a small archipelago called Labuan. East Malaysia li ...
n States of Malaysia, states of Sabah
Sabah () is a state of Malaysia located in northern Borneo, in the region of East Malaysia. Sabah borders the Malaysian state of Sarawak to the southwest and the North Kalimantan province of Indonesia to the south. The Federal Territory ...
and Sarawak
Sarawak (; ) is a state of Malaysia. The largest among the 13 states, with an area almost equal to that of Peninsular Malaysia, Sarawak is located in northwest Borneo Island, and is bordered by the Malaysian state of Sabah to the northeast, ...
, as well as the Federal Territory (Malaysia), Federal Territory of Labuan
Labuan (), officially the Federal Territory of Labuan ( ms, Wilayah Persekutuan Labuan), is a Federal Territory of Malaysia. Its territory includes and six smaller islands, off the coast of the state of Sabah in East Malaysia. Labuan's capi ...
(on offshore islands nearby)
Economy
Borneo's economy depends mainly on agriculture, logging and mining, crude oil, oil and gas, and ecotourism. Brunei's economy is highly dependent on the oil and gas production sector, and the country has become one of the largest oil producers in Southeast Asia. The Malaysian states of Sabah and Sarawak are both top exporters of Lumber, timber. Sabah is also known as the agricultural producer of natural rubber, rubber, theobroma cacao, cacao, and vegetables, and for its fisheries, while Sabah, Sarawak and Labuan export liquefied natural gas (LNG) and petroleum. The Indonesian provinces of Kalimantan are mostly dependent on mining sectors despite also being involved in logging and oil and gas explorations.
See also
* Hikayat Banjar
* Kutai basin
* List of islands of Indonesia
* List of islands of Malaysia
* Maphilindo
* List of bats of Borneo
Notes
References
Further reading
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External links
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Environmental Profile of Borneo
– Background on Borneo, including natural and social history, deforestation statistics, and conservation news.
{{Authority control
Borneo,
Greater Sunda Islands
International islands
Islands of Brunei
Islands of Indonesia
Islands of Malaysia
Kalimantan
Maritime Southeast Asia
Regions of Eurasia