Major tropical rainforests are usually named for the regions they cover. The largest is the Amazon rainforest in South America, which holds more than 40 percent of the planet’s remaining rainforest. The second-largest continuous tropical rainforest is in the Congo Basin of Central Africa.
The third-largest tropical forest block is in Southeast Asia, with major contiguous tracts on islands such as New Guinea and Borneo (much of it in Indonesia). Other tropical rainforest areas occur in Central America and parts of tropical Australia.
Source: CIFOR Forests News — A journey across the world’s largest rainforests