What city has the largest population south of the equator?

São Paulo, Brazil is the largest city south of the equator, the largest city in the Americas, the largest city in Brazil, and the world's twelfth largest city by population. As of 2014, the population is roughly 11.9 million people; it is 3,067 square miles in size. The nearly 12 million people who live in São Paulo are known as "paulistanos."