city located in southwestern Chad, on the Logone River. With a warm, seasonally wet climate, it lies in the centre of the nation'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. (2000 est.) 108,700.