The four biggest cities in the tropical zone of the Southern Hemisphere are:
- Sao Paulo; located in South America, in the country of Brazil, with a population of 21 million people is the largest metropolitan area on the whole Southern Hemisphere.
- Jakarta; located in Southeast Asia, in the country of Indonesia to which it is the capital city, with its population of 18 million people is the largest metropolitan area in the eastern half of the Southern Hemisphere.
- Buenos Aires; located in South America, in the country of Argentina, with a population of 12 million people it is the the third largest metropolitan area in the Southern Hemisphere.
- Rio de Janeiro; located in South America, in the country of Brazil, it is the second biggest Brazilian city with its population of 11 million people, and the fourth largest city in the Southern Hemisphere.
