Bossou is a town and sub-prefecture in the Lola Prefecture in the Nzérékoré Region of south-eastern Guinea.

[1] Much of the sub prefecture consists of the Mount Nimba Strict Nature Reserve.

The Bossou Hills Reserve situated at the south-eastern limit of the city, which is famous for its chimpanzees habituated to humans, and make Bossou Hills the best chimpanzee observer place in Western Africa.

Bossou is known to be very rich in agriculture as its people grow coffee beans, rice, fruits and corn.

In 2024, local residents of Bossou demolished the chimpanzees research centre at the Reserve as one of the animals was reported to have captured and killed a human infant.