Worlds Largest Cities(by population)

10. Mexico City, Mexico (19,463,000)

Mexico City is the Federal District, capital of Mexico and seat of the federal powers of Mexico . It is a federal entity within Mexico which is not part of any one of the 31 Mexican states but belongs to the federation as a whole. Wikipedia

9. Sao Paulo , Brazil (20,186,000)

São Paulo is the largest city in Brazil, the largest city proper in the southern hemisphere, in the Americas, and the world's sixth largest city by population. (wikipedia)

8. New York, USA (20,464,000)

New York is the most populous city in the United States and the center of the New York metropolitan area, one of the most populous urban agglomerations in the world. (wikipedia)

7. Karachi, Pakistan (20,711,000)

Karachi is the largest and most populous metropolitan city of Pakistan and its main seaport and financial centre, as well as the capital of Sindh province. (wikipedia)

6. Manila, Philippines (20,767,000)

Manila is the capital of the Philippines. It is one of the sixteen cities which, along with the municipality of Pateros, make up Metro Manila, the National Capital Region, whose overall population is around 20 million.

5. Shanghai, China (20,860,000)

Shanghai is the largest city by population in China and the largest city proper by population in the world. It is one of the four direct-controlled municipalities of China, with a total population of near 21 million as of 2013.

4. Delhi, India (22,242,000)

Delhi is a metropolitan region in India. With a population of 22 million in 2011, it is the world's second most populous city and the largest city in India in terms of area. (wikipedia)

3. Seoul, South Korea (22,547,000)

Seoul — officially the Seoul Special City — is the capital and largest metropolis of South Korea. A megacity with a population of more than 10 million, it is the largest city proper in the developed world. Wikipedia

2. Jakarta, Indonesia (26,063,000)

Jakarta, officially known as the Special Capital Region of Jakarta, is the capital and largest city of Indonesia. Wikipedia

1. Tokyo, Japan (37,126,000)

Tokyo, officially Tokyo Metropolis, is one of the 47 prefectures of Japan. Tokyo is the capital of Japan, the centre of the Greater Tokyo Area, and the largest metropolitan area in the world. Wikipedia