6 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Americus | 1 | 15,516 | 16,193 | -0.72% | 1,367 | 11 | City |
| Webster County | 2 | 2,296 | 2,352 | -0.39% | 11 | 210 | Unified Government |
| Plains | 3 | 504 | 567 | -1.95% | 619 | 1 | City |
| Leslie | 4 | 335 | 340 | -0.3% | 189 | 2 | City |
| Andersonville | 5 | 237 | 237 | 0% | 172 | 1 | City |
| De Soto | 6 | 119 | 122 | 0% | 146 | 1 | City |
Americus is the largest city in Sumter County, with a population of 15,516.
De Soto is the smallest city in Sumter County, with a population of 119.
There are 6 cities in Sumter County, Georgia.