6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Americus | 1 | 15,629 | 16,193 | -0.72% | 1,377 | 11 | City |
| Webster County | 2 | 2,305 | 2,352 | -0.43% | 11 | 210 | Unified Government |
| Plains | 3 | 514 | 567 | -2.1% | 631 | 1 | City |
| Leslie | 4 | 336 | 340 | -0.3% | 190 | 2 | City |
| Andersonville | 5 | 237 | 237 | 0% | 172 | 1 | City |
| De Soto | 6 | 119 | 122 | -0.83% | 146 | 1 | City |
Americus is the largest city in Sumter County, with a population of 15,629.
De Soto is the smallest city in Sumter County, with a population of 119.
There are 6 cities in Sumter County, Georgia.