| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Americus | 1 | 15,526 | 16,192 | -0.58% | 1,368 | 11 | City |
| Webster County | 2 | 2,363 | 2,352 | -0.25% | 11 | 210 | Unified Government |
| Plains | 3 | 521 | 571 | -1.88% | 640 | 1 | City |
| Leslie | 4 | 335 | 341 | -0.3% | 189 | 2 | City |
| Andersonville | 5 | 235 | 235 | 0% | 170 | 1 | City |
| De Soto | 6 | 119 | 123 | -0.83% | 146 | 1 | City |
Americus is the largest city in Sumter County, with a population of 15,526.
De Soto is the smallest city in Sumter County, with a population of 119.
There are 6 cities in Sumter County, Georgia.