| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Okchilar | city | Anatoliki Makedonia kai Thraki | Greece | 41.09 | 24.79 | 219 | 8304 |
| Okelemez | city | Dytiki Makedonia | Greece | 40.71 | 21.79 | 1883 | 1478 |
| Okhirón | city | Anatoliki Makedonia kai Thraki | Greece | 41.30 | 23.85 | 1860 | 2065 |
| Okhiá | city | Peloponnisos | Greece | 36.48 | 22.39 | 400 | 877 |
| Okhthia | city | Dytiki Ellada | Greece | 38.66 | 21.28 | 127 | 5717 |
| Okhthonía | city | Sterea Ellada | Greece | 38.53 | 24.16 | 1725 | 2549 |
| Oksya | city | Dytiki Makedonia | Greece | 40.74 | 21.13 | 3349 | 423 |
| Oktoniá | city | Sterea Ellada | Greece | 38.53 | 24.16 | 1725 | 2549 |
| Okúz-Ová | city | Dytiki Makedonia | Greece | 40.34 | 22.02 | 3474 | 1693 |