13 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Oakwood | Hall County | 7,238 |
| Ocilla | Irwin County | 2,780 |
| Oxford | Newton County | 2,312 |
| Omega | Tift County | 1,325 |
| Oglethorpe | Macon County | 947 |
| Ochlocknee | Thomas County | 685 |
| Oak Park | Emanuel County | 512 |
| Odum | Wayne County | 502 |
| Offerman | Pierce County | 472 |
| Orchard Hill | Spalding County | 234 |
| Oliver | Screven County | 224 |
| Oconee | Washington County | 181 |
| Ohoopee | Emanuel County | 51 |