Moundou, city, southwestern Chad, located on the Logone River.
With a warm, seasonally wet climate, it lies in the centre of the country’s cotton-growing region and is the site of a cotton-research institute established in 1939. It is also the site of one of Chad’s largest commercial enterprises, a brewery established in 1964. Moundou has a secondary-school branch, a hospital, an electrical power supply, and a local air service. The Logone is seasonally navigable from Moundou to N’Djamena. Pop. (2009 prelim.) 132,411.