Megacity population and rank for world cities for the year 1990
| Rank | Megacity | Country | Population |
|---|---|---|---|
| 1 | Tokyo | Japan | 32,530,003 |
| 2 | Kinki M.M.A. (Osaka) | Japan | 18,388,783 |
| 3 | New York-Newark | United States of America | 16,085,598 |
| 4 | Ciudad de México (Mexico City) | Mexico | 15,642,318 |
| 5 | São Paulo | Brazil | 14,775,840 |
| 6 | Mumbai (Bombay) | India | 12,355,090 |
| 7 | Buenos Aires | Argentina | 11,147,566 |
| 8 | Kolkata (Calcutta) | India | 10,974,177 |
| 9 | Los Angeles-Long Beach-Santa Ana | United States of America | 10,883,429 |
| 10 | Seoul | Republic of Korea | 10,517,565 |
| 11 | Al-Qahirah (Cairo) | Egypt | 9,892,143 |
| 12 | Rio de Janeiro | Brazil | 9,697,487 |
| 13 | Delhi | India | 9,384,209 |
| 14 | Paris | France | 9,330,327 |
| 15 | Moskva (Moscow) | Russian Federation | 8,986,631 |
| 16 | Shanghai | China | 8,605,812 |
| 17 | Chukyo M.M.A. (Nagoya) | Japan | 8,407,204 |
| 18 | Jakarta | Indonesia | 8,174,756 |
| 19 | Manila | Philippines | 7,972,799 |
| 20 | Chicago | United States of America | 7,373,695 |
| 21 | Karachi | Pakistan | 7,147,064 |
| 22 | London | United Kingdom | 6,794,400 |
| 23 | Beijing | China | 6,787,737 |
| 24 | Dhaka | Bangladesh | 6,620,697 |
| 25 | Istanbul | Turkey | 6,552,160 |
| 26 | Tehran | Iran (Islamic Republic of) | 6,364,827 |
| 27 | Krung Thep (Bangkok) | Thailand | 5,888,835 |
| 28 | Lima | Peru | 5,836,537 |
| 29 | Hong Kong | China, Hong Kong SAR | 5,753,523 |
| 30 | Chennai (Madras) | India | 5,332,057 |
Data from UN World Urbanization Prospects