Bogota , with a population of 9 million , is one of the largest Southern Hemisphere Metropolitan areas .
The largest metropolitan areas in the Southern Hemisphere are São Paulo ( 21 million people ) , Jakarta ( 30 million people ) , Buenos Aires ( 12 million people ) , Rio de Janeiro ( 11 million people ) , Kinshasa ( 11 million people ) , Santiago ( 6 million ) and Sydney ( 6 million ) .
Southern Hemisphere