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A megacity is a very large city, typically with a population of more than 10 million people.[1][2][3][4] The United Nations Department of Economic and Social Affairs in its 2018 "World Urbanization Prospects" report defines megacities as urban agglomerations with over 10 million inhabitants.[5] A University of Bonn report holds that they are "usually defined as metropolitan areas with a total population of 10 million or more people".[6] Elsewhere in other sources, from five to eight million is considered the minimum threshold, alongside a population density of at least 2,000 per square kilometre.[7] The terms conurbation, metropolis, and metroplex are also applied to the latter.[7]
The total number of megacities in the world varies between different sources: The world had 33 according to the UN (in 2018), 45 according to CityPopulation.de (in 2023), and 44 according to Demographia (in 2023). About half of these urban agglomerations are in China and India. The other four countries with more than one megacity are Brazil, Japan, Pakistan, and the United States. African megacities are present in Nigeria, Egypt, South Africa, and the DRC; European megacities are present in Russia, France, the United Kingdom, and Turkey (also in Asia); megacities can be found in Latin America in the countries of Brazil, Mexico, Colombia, Peru, and Argentina. Some sources identify Tokyo's Greater Tokyo Area as the largest megacity in the world,[5][8] while some others give the title to the Pearl River Delta in China.[9][10][11]
List of megacities
 | It has been suggested that this section be merged into List of largest cities. (Discuss) Proposed since March 2024. |
| Megacity | Image | Country | Region | Estimated population | ||
|---|---|---|---|---|---|---|
| CityPopulation.de 2023[9] |
Demographia 2023[8] |
UN DESA 2018[5] | ||||
| Bangalore | 
|
 India
|
South Asia | 13,700,000 | 15,257,000 | 11,440,000 |
| Bangkok | 
|
 Thailand
|
Southeast Asia | 20,500,000 | 18,884,000 | 10,156,000 |
| Beijing | .jpg)
|
 China
|
East Asia | 20,900,000 | 18,883,000 | 19,618,000 |
| Bogotá | 
|
 Colombia
|
South America | 10,200,000 | 10,252,000 | 10,574,000 |
| Buenos Aires | .jpg)
|
 Argentina
|
South America | 16,700,000 | 15,748,000 | 14,967,000 |
| Cairo | .jpg){kind=small}
|
 Egypt
|
North Africa | 22,200,000 | 22,679,000 | 20,076,000 |
| Changsha | 
|
China
|
East Asia | 10,500,000 | 5,065,000 | 4,345,000 |
| Chengdu | 
|
China
|
East Asia | 16,600,000 | 15,016,000 | 8,813,000 |
| Chennai | 
|
India
|
South Asia | 12,200,000 | 11,570,000 | 10,456,000 |
| Chongqing | 
|
China
|
East Asia | 10,500,000 | 12,653,000 | 14,838,000 |
| Delhi | 
|
India
|
South Asia | 33,400,000 | 31,190,000 | 28,514,000 |
| Dhaka | .jpg)
|
 Bangladesh
|
South Asia | 21,300,000 | 19,134,000 | 19,578,000 |
| Dongguan | 
|
China
|
East Asia | Combined with Guangzhou |
10,753,000 | 7,360,000 |
| Guangzhou | 
|
China
|
East Asia | 67,800,000 | 27,119,000 | 12,638,000 |
| Hangzhou | 
|
China
|
East Asia | 13,400,000 | 9,618,000 | 7,236,000 |
| Ho Chi Minh City | 
|
 Vietnam
|
Southeast Asia | 13,500,000 | 14,953,000 | 8,145,000 |
| Hyderabad | India
|
South Asia | 11,100,000 | 9,797,000 | 9,482,000 | |
| Istanbul | 
|
 Turkey
|
Europe, West Asia | 16,100,000 | 14,441,000 | 14,751,000 |
| Jakarta | 
|
 Indonesia
|
Southeast Asia | 28,900,000 | 35,386,000 | 10,517,000 |
| Johannesburg | 
|
 South Africa
|
Southern Africa | 14,800,000 | 15,551,000 | 5,486,000 |
| Karachi | 
|
 Pakistan
|
South Asia | 19,100,000 | 20,249,000 | 15,400,000 |
| Kinshasa | 
|
 DR Congo
|
Central Africa | 15,000,000 | 13,493,000 | 13,171,000 |
| Kolkata | 
|
India
|
South Asia | 17,400,000 | 21,747,000 | 14,681,000 |
| Lagos | 
|
 Nigeria
|
West Africa | 21,400,000 | 14,540,000 | 13,463,000 |
| Lahore | 
|
Pakistan
|
South Asia | 14,400,000 | 13,504,000 | 11,738,000 |
| Lima | 
|
 Peru
|
South America | 11,600,000 | 10,556,000 | 10,391,000 |
| London | 
|
 United Kingdom
|
Europe | 14,800,000 | 10,803,000 | 9,046,000 |
| Los Angeles | 
|
 United States
|
North America | 17,700,000 | 15,587,000 | 12,458,000 |
| Luanda | 
|
 Angola
|
Central Africa | 9,000,000 | 10,914,000 | 7,774,000 |
| Metro Manila | 
|
 Philippines
|
Southeast Asia | 26,700,000 | 24,156,000 | 13,482,000 |
| Mexico City | .jpg)
|
 Mexico
|
North America | 24,900,000 | 21,905,000 | 21,581,000 |
| Moscow | 
|
 Russia
|
Europe | 18,800,000 | 17,878,000 | 12,410,000 |
| Mumbai | 
|
India
|
South Asia | 26,600,000 | 25,189,000 | 19,980,000 |
| Nagoya | 
|
 Japan
|
East Asia | 10,500,000 | 9,439,000 | 9,507,000 |
| New York City | 
|
United States
|
North America | 23,100,000 | 21,396,000 | 18,819,000 |
| Osaka | 
|
Japan
|
East Asia | 17,700,000 | 14,916,000 | 19,281,000 |
| Paris | 
|
 France
|
Europe | 11,400,000 | 11,108,000 | 10,901,000 |
| Rio de Janeiro | 
|
 Brazil
|
South America | 13,400,000 | 12,306,000 | 13,293,000 |
| São Paulo | 
|
Brazil
|
South America | 23,000,000 | 21,486,000 | 21,650,000 |
| Seoul | .jpg)
|
 South Korea
|
East Asia | 24,900,000 | 23,225,000 | 9,963,000 |
| Shanghai | 
|
China
|
East Asia | 40,000,000 | 24,042,000 | 25,582,000 |
| Shenzhen | 
|
China
|
East Asia | Combined with Guangzhou |
17,778,000 | 11,908,000 |
| Tehran | 
|
 Iran
|
West Asia | 16,200,000 | 13,382,000 | 8,896,000 |
| Tianjin | 
|
China
|
East Asia | 11,400,000 | 10,047,000 | 13,215,000 |
| Tokyo | 
|
Japan
|
East Asia | 40,800,000 | 37,785,000 | 37,468,000 |
| Wuhan | 
|
China
|
East Asia | 11,800,000
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