| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oghlān Tappeh | city | Alborz | Iran | 35.84 | 50.71 | 4189 | 26329 |
| Oshtorak | city | Alborz | Iran | 36.04 | 51.31 | 6728 | 20860 |
| Oskul Deh | city | Alborz | Iran | 36.04 | 50.84 | 6719 | 4549 |
| Oskūl Darreh | city | Alborz | Iran | 36.04 | 50.84 | 6719 | 4549 |
| Owchān | city | Alborz | Iran | 36.26 | 50.54 | 5029 | 2086 |
| Owghlān Tappeh | city | Alborz | Iran | 35.84 | 50.71 | 4189 | 26329 |
| Owrāzān | city | Alborz | Iran | 36.13 | 50.88 | 7618 | 2086 |