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United Nations The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoniz ...
uses three definitions for what constitutes a city, as not all cities in all jurisdictions are classified using the same criteria. Cities may be defined as the cities proper, the extent of their
urban area An urban area, built-up area or urban agglomeration is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities ...
, or their metropolitan regions. The largest city by population using the city proper definition, which is the area under the administrative boundaries of a local government, is Chongqing, China. The largest city by population using the metropolitan area definition, which is a loose term referring to urban area and its primary commuter areas, is
Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and List of cities in Japan, largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, ...
, Japan. The largest city by population using the
urban area An urban area, built-up area or urban agglomeration is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities ...
definition, which is a loose term referring to a contiguous area with a certain population density, is also Tokyo, Japan.


Definitions


City proper (administrative)

A city can be defined by its administrative boundaries (
city proper A city proper is the geographical area contained within city limits. The term ''proper'' is not exclusive to cities; it can describe the geographical area within the boundaries of any given locality. The United Nations defines the term as "the sin ...
). UNICEF defines city proper as "the population living within the administrative boundaries of a city or controlled directly from the city by a single authority." A city proper is a locality defined according to legal or political boundaries and an administratively recognised urban status that is usually characterised by some form of
local government Local government is a generic term for the lowest tiers of public administration within a particular sovereign state. This particular usage of the word government refers specifically to a level of administration that is both geographically-l ...
. Cities proper and their boundaries and population data may not include suburbs. The use of city proper as defined by administrative boundaries may not include suburban areas where an important proportion of the population working or studying in the city lives. Because of this definition, the city proper population figure may differ greatly with the urban area population figure, as many cities are amalgamations of smaller municipalities (Australia), and conversely, many Chinese cities govern territories that extend well beyond the traditional "city proper" into suburban and rural areas. The Chinese municipality of Chongqing, which claims the largest city proper in the world by population, comprises a huge administrative area of 82,403 km2, around the size of
Austria Austria, , bar, Östareich officially the Republic of Austria, is a country in the southern part of Central Europe, lying in the Eastern Alps. It is a federation of nine states, one of which is the capital, Vienna, the most populous ...
. However, more than 70% of its 30-million population are actually agricultural workers living in a rural setting.


Urban area

A city can be defined as a conditionally
contiguous Contiguity or contiguous may refer to: *Contiguous data storage, in computer science *Contiguity (probability theory) *Contiguity (psychology) *Contiguous distribution of species, in biogeography *Geographic contiguity of territorial land *Contigu ...
urban area An urban area, built-up area or urban agglomeration is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities ...
, without regard to territorial or other boundaries inside an urban area.
UNICEF UNICEF (), originally called the United Nations International Children's Emergency Fund in full, now officially United Nations Children's Fund, is an agency of the United Nations responsible for providing humanitarian and developmental aid to ...
defines urban area as follows: According to
Demographia Wendell Cox is an American urban policy analyst and proponent of the use of the private car over rail projects. He is the principal and sole owner of Wendell Cox Consultancy/Demographia, based in the St. Louis metropolitan region and editor of thr ...
, an urban area is a continuously built up land mass of urban development that is within a labor market (metropolitan area or metropolitan region) and contains no rural land.


Metropolitan area

A city can be defined by the inhabitants of its demographic population, as by metropolitan area, or labour market area. UNICEF defines metropolitan area as follows: In many countries, metropolitan areas are established either with an official organisation or only for statistical purposes. In the United States,
metropolitan statistical area In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the area. Such regions are neither legally incorporated as a city or tow ...
(MSA) is defined by the U.S. Office of Management and Budget (OMB) for statistical purposes. In the Philippines, metropolitan areas have an official agency, such as Metropolitan Manila Development Authority (MMDA) which manages Manila metropolitan area. Similar agencies exist in Indonesia such as Jabodetabekjur Development Cooperation Agency for
Jakarta metropolitan area The Jakarta metropolitan area or Greater Jakarta, known locally as Jabodetabek (an acronym of Jakarta– Bogor– Depok–Tangerang– Bekasi), and sometimes extended to Jabodetabekjur (with the acronym extended to include part of Cianjur Regen ...
.


List

There are 81 cities with a population over 5 million people according to the United Nations 2018 estimates. The UN figures are a mixture of city proper, metropolitan area, and urban area. Several cities such as Jakarta and
Seoul Seoul (; ; ), officially known as the Seoul Special City, is the capital and largest metropolis of South Korea.Before 1972, Seoul was the ''de jure'' capital of the Democratic People's Republic of Korea (North Korea) as stated iArticle 103 of ...
have significantly larger metropolitan/urban population figures which are excluded in the UN data.
File:Skyscrapers of Shinjuku 2009 January.jpg,
Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and List of cities in Japan, largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, ...
has a population of 39 million (urban area) File:Jakarta_Skyline_Part_2.jpg, Jakarta has a population of 35 million (urban area) File:Chaotianmen Bridge, Nan'an District of Chongqing.jpg, Chongqing has a population of 32 million (city proper) File:Skyline at Rajiv Chowk.JPG,
Delhi Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Straddling the Yamuna river, primarily its western or right bank, Delhi shares borders ...
has a population of a 28 million (urban area) File:Pudong Shanghai November 2017 panorama.jpg,
Shanghai Shanghai (; , , Standard Mandarin pronunciation: ) is one of the four direct-administered municipalities of the People's Republic of China (PRC). The city is located on the southern estuary of the Yangtze River, with the Huangpu River flowin ...
has a population of 25.58 million (city proper) File:Seoul (South Korea).jpg,
Seoul Seoul (; ; ), officially known as the Seoul Special City, is the capital and largest metropolis of South Korea.Before 1972, Seoul was the ''de jure'' capital of the Democratic People's Republic of Korea (North Korea) as stated iArticle 103 of ...
has a population of 25.51 million (metropolitan area) File:Mumbai Skyline at Night.jpg,
Mumbai Mumbai (, ; also known as Bombay — List of renamed Indian cities and states#Maharashtra, the official name until 1995) is the capital city of the Indian States and union territories of India, state of Maharashtra and the ''de facto'' fin ...
has a population of 24 million (metropolitan area) File:Manila downtown - Binondo, Quiapo, Quezon Bridge, Pasig River, Arroceros (close-up) (Manila)(2018-02-07).jpg,
Manila Manila ( , ; fil, Maynila, ), officially the City of Manila ( fil, Lungsod ng Maynila, ), is the capital of the Philippines, and its second-most populous city. It is highly urbanized and, as of 2019, was the world's most densely populate ...
has a population of 23.97 million (urban area) File:View of Empire State Building from Rockefeller Center New York City dllu.jpg,
New York City New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the most densely populated major city in the Un ...
has a population of 23.58 million (urban area) File:Webysther 20190306131041 - Edifício Altino Arantes.jpg,
São Paulo São Paulo (, ; Portuguese for ' Saint Paul') is the most populous city in Brazil, and is the capital of the state of São Paulo, the most populous and wealthiest Brazilian state, located in the country's Southeast Region. Listed by the Ga ...
has a population of 22.50 million (urban area) File:Skyline of Beijing CBD with B-5906 approaching (20211016171955).jpg,
Beijing } Beijing ( ; ; ), alternatively romanized as Peking ( ), is the capital of the People's Republic of China. It is the center of power and development of the country. Beijing is the world's most populous national capital city, with over 21 ...
has a population of 21.89 million (city proper) File:Sobrevuelos CDMX HJ2A4913 (25514321687) (cropped).jpg,
Mexico City Mexico City ( es, link=no, Ciudad de México, ; abbr.: CDMX; Nahuatl: ''Altepetl Mexico'') is the capital city, capital and primate city, largest city of Mexico, and the List of North American cities by population, most populous city in North Amer ...
has a population of 21.80 million (metropolitan area)


See also

* Historical urban community sizes * List of largest cities throughout history * List of towns and cities with 100,000 or more inhabitants * Number of urban areas by country


Notes


References


External links


UNSD Demographics Statistics – City population by sex, city and city type

Nordpil World Database of Large Urban Areas, 1950–2050
{{Cities Cities-related lists of superlatives Lists of cities (worldwide) by population Urban geography Largest things