| City | County | 2026 Pop. ↓ |
|---|---|---|
| Oakwood | Hall County | 7,738 |
| Ocilla | Irwin County | 2,702 |
| Oxford | Newton County | 2,295 |
| Omega | Tift County | 1,344 |
| Oglethorpe | Macon County | 946 |
| Ochlocknee | Thomas County | 688 |
| Oak Park | Emanuel County | 518 |
| Odum | Wayne County | 511 |
| Offerman | Pierce County | 479 |
| Orchard Hill | Spalding County | 238 |
| Oliver | Screven County | 225 |
| Oconee | Washington County | 171 |
| Ohoopee | Emanuel County | 25 |