| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Omalon | city | Nomos Kilkis | Greece | 40.91 | 22.39 | 1309 | 2464 |
| Omaló | city | Nomos Kilkis | Greece | 40.91 | 22.39 | 1309 | 2464 |
| Orizartsi | city | Nomos Kilkis | Greece | 40.93 | 22.56 | 36 | 4528 |
| Orévitsa | city | Nomos Kilkis | Greece | 41.04 | 22.57 | 492 | 3202 |