13 cities
| City | County | 2026 Pop. ↓ |
|---|---|---|
| Oakwood | Hall County | 7,717 |
| Ocilla | Irwin County | 2,644 |
| Oxford | Newton County | 2,315 |
| Omega | Tift County | 1,326 |
| Oglethorpe | Macon County | 938 |
| Ochlocknee | Thomas County | 689 |
| Oak Park | Emanuel County | 513 |
| Odum | Wayne County | 510 |
| Offerman | Pierce County | 477 |
| Orchard Hill | Spalding County | 237 |
| Oliver | Screven County | 225 |
| Oconee | Washington County | 180 |
| Ohoopee | Emanuel County | 25 |