4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bainbridge | 1 | 14,638 | 14,482 | 0.18% | 716 | 20 | City |
| Attapulgus | 2 | 442 | 454 | -0.45% | 555 | 1 | City |
| Climax | 3 | 266 | 274 | -0.37% | 331 | 1 | City |
| Brinson | 4 | 214 | 219 | -0.47% | 105 | 2 | Town |
Bainbridge is the largest city in Decatur County, with a population of 14,638.
Brinson is the smallest city in Decatur County, with a population of 214.
There are 4 cities in Decatur County, Georgia.