The following are the top 10 largest cities in the world, based on “urban agglomerations” as defined by the United Nations. This method of counting disregards administrative boundaries of the more extensive areas that stretch across densely populated suburbs.

Rank, City, County, Population (in millions)

1. Tokyo, Japan, 33.4
2. Seoul, South Korea, 23.1
3. Mexico City, Mexico, 22.0
4. New York, US, 21.8
5. Mumbai (Bombay), India, 21.1
6. Delhi, India, 20.8
7. Sao Paulo, Brazil, 20.3
8. Shanghai, China, 18.6
9. Los Angeles, US, 17.9
10. Jakarta, Indonesia, 16.9

These are the populations recorded in 2006. Source: http://www.citypopulation.de. Find the best educational toys here.