Birougou National Park, also known as the Monts Birougou Wetlands is a national park in central Gabon. It contains extremely dense rain forest in the Chaillu Mountains and is one of the two parks where the endemic sun-tailed guenon, a monkey first described in 1988, can be found. It is named after Mount Birougou, 975 metres in altitude, one of the highest peaks in the country.

Due to its purported universal cultural and natural significance, it was added onto the UNESCO World Heritage Tentative List on October 20, 2005. Portions of the park have been designated as a Ramsar site since 2007.

Apart from the sun-tailed guenon (this being only one of 2 reserves where this species is found), there are a wide range of primates, including (though not limited to) chimpanzee and gorilla. Forest elephants and forest buffalo are also present.