Megacity population and rank for world cities for the year 1970
| Rank | Megacity | Country | Population |
|---|---|---|---|
| 1 | Tokyo | Japan | 23,297,503 |
| 2 | New York-Newark | United States of America | 16,191,180 |
| 3 | Kinki M.M.A. (Osaka) | Japan | 15,271,510 |
| 4 | Ciudad de México (Mexico City) | Mexico | 8,830,947 |
| 5 | Buenos Aires | Argentina | 8,416,170 |
| 6 | Los Angeles-Long Beach-Santa Ana | United States of America | 8,377,685 |
| 7 | Paris | France | 8,208,121 |
| 8 | São Paulo | Brazil | 7,620,490 |
| 9 | London | United Kingdom | 7,509,405 |
| 10 | Kolkata (Calcutta) | India | 7,329,372 |
| 11 | Moskva (Moscow) | Russian Federation | 7,106,457 |
| 12 | Chicago | United States of America | 7,105,799 |
| 13 | Rio de Janeiro | Brazil | 6,790,519 |
| 14 | Chukyo M.M.A. (Nagoya) | Japan | 6,603,381 |
| 15 | Mumbai (Bombay) | India | 6,412,876 |
| 16 | Shanghai | China | 6,052,468 |
| 17 | Al-Qahirah (Cairo) | Egypt | 5,584,507 |
| 18 | Seoul | Republic of Korea | 5,311,569 |
| 19 | Beijing | China | 4,426,045 |
| 20 | Philadelphia | United States of America | 4,395,851 |
| 21 | Kitakyushu-Fukuoka M.M.A. | Japan | 4,071,698 |
| 22 | Sankt Peterburg (Saint Petersburg) | Russian Federation | 3,980,181 |
| 23 | Detroit | United States of America | 3,966,483 |
| 24 | Jakarta | Indonesia | 3,915,406 |
| 25 | Manila | Philippines | 3,534,309 |
| 26 | Delhi | India | 3,530,693 |
| 27 | Madrid | Spain | 3,520,861 |
| 28 | Barcelona | Spain | 3,482,047 |
| 29 | Hong Kong | China, Hong Kong SAR | 3,397,839 |
| 30 | Tianjin | China | 3,317,826 |
Data from UN World Urbanization Prospects