| Rank | City | Population |
| 1. | Tokyo, Japan | 37,339,804 |
| 2. | Delhi, India | 31,181,376 |
| 3. | Shanghai, China | 27,795,702 |
| 4. | Sao Paulo, Brazil | 22,237,472 |
| 5. | Mexico City, Mexico | 21,918,936 |
| 6. | Dhaka, Bangladesh | 21,741,090 |
| 7. | Cairo, Egypt | 21,322,750 |
| 8. | Beijing, China | 20,896,820 |
| 9. | Mumbai, India | 20,667,656 |
| 10. | Osaka, Japan | 19,110,616 |
| 11. | Karachi, Pakistan | 16,459,472 |
| 12. | Chongqing, China | 16,382,376 |
| 13. | Istanbul, Turkey | 15,415,197 |
| 14. | Buenos Aires, Argentina | 15,257,673 |
| 15. | Kolkata, India | 14,974,073 |
| 16. | Kinshasa, Democratic Republic of the Congo | 14,970,460 |
| 17. | Lagos, Nigeria | 14,862,111 |
| 18. | Manila, Philippines | 14,158,573 |
| 19. | Tianjin, China | 13,794,450 |
| 20. | Guangzhou, China | 13,635,397 |
