| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Oapatlu | city | | Iran | 36.3961111 | 48.5644444 | 6614 | 6406 |
| Obar | city | | Iran | 36.9180556 | 48.9647222 | 2329 | 6360 |
| Ogholbeyk | city | | Iran | 36.5 | 47.95 | 5652 | 6399 |
| Oghor | city | | Iran | 35.8833333 | 49.05 | 5547 | 6444 |
| Olibeyg | city | | Iran | 35.9330556 | 48.1447222 | 5049 | 6441 |
| Olkash | city | | Iran | 37.1502778 | 48.7813889 | 6384 | 6518 |
| Olībeyg | city | | Iran | 35.9330556 | 48.1447222 | 5049 | 6441 |
| Oorneh | city | | Iran | 35.9558333 | 49.2622222 | 5885 | 6441 |
| Ordak | city | | Iran | 36.4833333 | 49.2333333 | 4885 | 6399 |
| Organ-e Kord | city | | Iran | 36.6333333 | 49.3666667 | 1437 | 7057 |
| Organ-e Tork | city | | Iran | 36.6166667 | 49.3833333 | 1794 | 6780 |
| Orgān-e Kord | city | | Iran | 36.6333333 | 49.3666667 | 1437 | 7057 |
| Orumi | city | | Iran | 37.1516667 | 48.3291667 | 6499 | 7210 |
| Orūmī | city | | Iran | 37.1516667 | 48.3291667 | 6499 | 7210 |
| Owlad Oghlu | city | | Iran | 36.0333333 | 50.3 | 3812 | 6437 |
| Owlang | city | | Iran | 36.4 | 48.7333333 | 6122 | 6406 |
| Owlen Delbar | city | | Iran | 36.7666667 | 48.7166667 | 8835 | 6374 |
| Owli Beyg | city | | Iran | 35.9330556 | 48.1447222 | 5049 | 6441 |
| Owli Beyk | city | | Iran | 35.9330556 | 48.1447222 | 5049 | 6441 |
| Owlād Oghlū | city | | Iran | 36.0333333 | 50.3 | 3812 | 6437 |
| Owlī Beyg | city | | Iran | 35.9330556 | 48.1447222 | 5049 | 6441 |
| Owlī Beyk | city | | Iran | 35.9330556 | 48.1447222 | 5049 | 6441 |
| Owraneh | city | | Iran | 35.9558333 | 49.2622222 | 5885 | 6441 |
| Owruneh | city | | Iran | 35.9558333 | 49.2622222 | 5885 | 6441 |
| Owrūneh | city | | Iran | 35.9558333 | 49.2622222 | 5885 | 6441 |
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