9 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bainbridge | 1 | 14,612 | 14,502 | 0.18% | 713 | 20 | City |
| Bainbridge | 2 | 14,612 | 14,482 | 0.18% | 713 | 20 | City |
| Attapulgus | 3 | 444 | 455 | -0.45% | 558 | 1 | City |
| Attapulgus | 4 | 444 | 454 | -0.45% | 558 | 1 | City |
| Climax | 5 | 267 | 275 | -0.74% | 333 | 1 | City |
| Climax | 6 | 267 | 274 | -0.74% | 333 | 1 | City |
| Brinson | 7 | 215 | 219 | -0.46% | 105 | 2 | Town |
| Brinson | 8 | 215 | 219 | -0.46% | 105 | 2 | Town |
| Faceville | 9 | 189 | 140 | 7.39% | 74 | 3 | CDP |
Bainbridge is the largest city in Decatur County, with a population of 14,612.
Faceville is the smallest city in Decatur County, with a population of 189.
There are 9 cities in Decatur County, Georgia.