13 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Oakwood | Hall County | 7,440 |
| Ocilla | Irwin County | 2,592 |
| Oxford | Newton County | 2,288 |
| Omega | Tift County | 1,320 |
| Oglethorpe | Macon County | 926 |
| Ochlocknee | Thomas County | 677 |
| Oak Park | Emanuel County | 510 |
| Odum | Wayne County | 496 |
| Offerman | Pierce County | 470 |
| Orchard Hill | Spalding County | 239 |
| Oliver | Screven County | 220 |
| Oconee | Washington County | 179 |
| Ohoopee | Emanuel County | 51 |