Megacity population and rank for world cities for the year 1950
| Rank | Megacity | Country | Population |
|---|---|---|---|
| 1 | New York-Newark | United States of America | 12,338,471 |
| 2 | Tokyo | Japan | 11,274,641 |
| 3 | London | United Kingdom | 8,360,847 |
| 4 | Kinki M.M.A. (Osaka) | Japan | 7,005,284 |
| 5 | Paris | France | 6,283,018 |
| 6 | Moskva (Moscow) | Russian Federation | 5,356,392 |
| 7 | Buenos Aires | Argentina | 5,166,140 |
| 8 | Chicago | United States of America | 4,999,060 |
| 9 | Kolkata (Calcutta) | India | 4,604,143 |
| 10 | Shanghai | China | 4,288,091 |
| 11 | Los Angeles-Long Beach-Santa Ana | United States of America | 4,045,514 |
| 12 | Ciudad de México (Mexico City) | Mexico | 3,365,081 |
| 13 | Berlin | Germany | 3,337,621 |
| 14 | Philadelphia | United States of America | 3,127,806 |
| 15 | Mumbai (Bombay) | India | 3,088,811 |
| 16 | Rio de Janeiro | Brazil | 3,026,195 |
| 17 | Sankt Peterburg (Saint Petersburg) | Russian Federation | 2,902,789 |
| 18 | Detroit | United States of America | 2,769,254 |
| 19 | Boston | United States of America | 2,550,818 |
| 20 | Al-Qahirah (Cairo) | Egypt | 2,493,514 |
| 21 | Tianjin | China | 2,467,096 |
| 22 | Manchester | United Kingdom | 2,422,246 |
| 23 | São Paulo | Brazil | 2,334,038 |
| 24 | Chukyo M.M.A. (Nagoya) | Japan | 2,236,878 |
| 25 | Birmingham (West Midlands) | United Kingdom | 2,228,915 |
| 26 | Shenyang | China | 2,147,522 |
| 27 | Roma (Rome) | Italy | 1,884,065 |
| 28 | Milano (Milan) | Italy | 1,883,420 |
| 29 | San Francisco-Oakland | United States of America | 1,855,207 |
| 30 | Barcelona | Spain | 1,809,390 |
Data from UN World Urbanization Prospects