Agglomerations : top 25 for 2025

rank agglomeration, country population
1950 est.		 population
1975 est.		 population
2000 est.		 population
2010 est.		 population
2025 est.
1. Tokyo, Japan 11,274,641 26,614,733 34,449,908 36,932,780 38,661,394
2. Delhi, India 1,369,369 4,425,964 15,732,304 21,935,142 32,935,013
3. Shanghai, China 4,300,942 5,626,640 13,958,981 19,554,059 28,403,898
4. Mumbai (Bombay), India 2,857,359 7,081,960 16,366,787 19,421,983 26,556,872
5. Mexico City, Mexico 2,883,228 10,689,689 18,021,582 20,142,334 24,580,942
6. New York, USA 12,338,471 15,880,271 17,845,873 20,104,369 23,572,190
7. São Paulo, Brazil 2,334,038 9,614,016 17,099,204 19,649,366 23,174,743
8. Dhaka, Bangladesh 335,760 2,221,055 10,284,947 14,929,647 22,906,343
9. Beijing, China 1,671,365 4,827,864 10,162,386 14,999,554 22,632,757
10. Karachi, Pakistan 1,055,380 3,989,191 10,031,099 13,499,702 20,190,295
11. Lagos, Nigeria 325,218 1,889,802 7,280,706 10,788,300 18,856,648
12. Kolkata (Calcutta), India 4,513,496 7,887,768 13,058,060 14,283,096 18,710,999
13. Manila, Philippines 1,543,666 4,999,303 9,958,263 11,653,810 16,277,739
14. Los Angeles, USA 4,045,514 8,925,518 11,813,546 13,223,023 15,686,961
15. Shenzhen, China 3,148 35,547 6,550,414 10,222,493 15,544,637
16. Buenos Aires, Argentina 5,097,612 8,744,610 11,846,990 13,369,921 15,524,248
17. Guangzhou, China 1,049,031 1,698,206 7,330,099 10,485,570 15,474,205
18. Istanbul, Turkey 967,497 3,600,332 8,743,868 10,952,950 14,896,795
19. Cairo, Egypt 2,493,514 6,449,922 10,169,986 11,031,494 14,740,292
20. Kinshasa, Congo, DR. 201,905 1,481,820 5,414,151 8,415,198 14,535,234
21. Chongqing, China 1,566,966 2,401,817 7,435,791 9,732,286 13,627,145
22. Rio de Janeiro, Brazil 2,950,238 7,557,382 10,802,750 11,867,236 13,621,289
23. Bangalore, India 745,999 2,110,599 5,567,289 8,275,032 13,193,233
24. Jakarta, Indonesia 1,452,000 4,813,132 8,389,759 9,629,953 12,821,889
25. Chennai (Madras), India 1,491,293 3,608,601 6,352,607 8,522,504 12,814,166
source: "World Urbanization Prospects: The 2011 Revision", Population Division, United Nations Department of Economic and Social Affairs.
note: See for more data on the subject: World Urbanization Prospects, the 2011 Revision.