Demopolis Lake
General data
- Name: Demopolis Lake
- Water system: Mobile River
- Water type: Artificial lake
- Progression: Tombigbee River -> Mobile River -> Mobile Bay -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical
- Continents: North America
- Countries: United States of America
Demopolis Lake (Alabama, USA) is a reservoir on the Tombigbee River formed by Demopolis Lock and Dam, just west of Demopolis, Alabama. It also receives flow from the Black Warrior River where that river joins the Tombigbee just upstream of the reservoir.