| Gainesville Lake | |
| Coords: | 33.0639°N -88.1931°W |
| Basin Countries: | United States |
| Pushpin Map: | Alabama#USA |
| Pushpin Map Alt: | Location of Gainesville Lake in Alabama, USA. |
Gainesville Lake is a reservoir in northwest Alabama on the Tennessee-Tombigbee Waterway. Close to Gainesville, it is impounded by the Howell Heflin Lock and Dam.