Gainesville
- County:
- Sumter County
- County Seat:
- No
- Area (mi²):
- 1.719
- State:
- Alabama
Gainesville is a town located in Sumter County, Alabama. Gainesville has a 2026 population of 164. Gainesville is currently declining at a rate of -1.8% annually and its population has decreased by -5.2% since the most recent census, which recorded a population of 173 in 2020.
The median age in Gainesville is 35.2 years: 25.1 years for males, and 35.9 years for females. For every 100 females there are 73.5 males.