| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Osa | city | | Iran | 36.55 | 53.25 | 508 | 11184 |
| Osbak Kuh | city | Ostan-e Khorasan | Iran | 34.7225 | 57.2269444 | 3549 | 2819 |
| Osbak Kūh | city | Ostan-e Khorasan | Iran | 34.7225 | 57.2269444 | 3549 | 2819 |
| Osbok | city | Ostan-e Kerman | Iran | 29.9288889 | 56.4375 | 6902 | 1551 |
| Osdaghi | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.405 | 45.8419444 | 4553 | 8958 |
| Osdaghi | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.3983333 | 45.8805556 | 5078 | 8958 |
| Osdaqi | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.3983333 | 45.8805556 | 5078 | 8958 |
| Osdāghī | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.405 | 45.8419444 | 4553 | 8958 |
| Osdāghī | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.3983333 | 45.8805556 | 5078 | 8958 |
| Osdāqī | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.3983333 | 45.8805556 | 5078 | 8958 |
| Oseyfer | city | Ostan-e Khuzestan | Iran | 30.65 | 48.75 | 59 | 7389 |
| Osfok | city | Ostan-e Kerman | Iran | 29.9288889 | 56.4375 | 6902 | 1551 |
| Osgelu | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8391667 | 46.9391667 | 6765 | 8902 |
| Osgelū | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8391667 | 46.9391667 | 6765 | 8902 |
| Osghul | city | Ostan-e Khorasan | Iran | 32.6194444 | 59.335 | 5944 | 2892 |
| Oshan | city | Ostan-e Azarbayjan-e Gharbi | Iran | 37.5033333 | 46.3041667 | 6161 | 9069 |
| Oshdalaq | city | Ostan-e Kerman | Iran | 38.45 | 46.9333333 | 4711 | 8954 |
| Oshkali Za'er 'oseyni | city | Ostan-e Bushehr | Iran | 29.08333 | 51.2611111 | 374 | 4135 |
| Oshkohran | city | Ostan-e Esfahan | Iran | 32.4402778 | 52.5794444 | 4822 | 4765 |
| Oshkohrān | city | Ostan-e Esfahan | Iran | 32.4402778 | 52.5794444 | 4822 | 4765 |
| Oshkuri | city | Ostan-e Fars | Iran | 29.0380556 | 52.8666667 | 5045 | 4051 |
| Oshkutu'iyeh | city | Ostan-e Kerman | Iran | 26.7313889 | 58.86 | 2841 | 1596 |
| Oshkālī Zā'er 'oseynī | city | Ostan-e Bushehr | Iran | 29.08333 | 51.2611111 | 374 | 4135 |
| Oshkūrī | city | Ostan-e Fars | Iran | 29.0380556 | 52.8666667 | 5045 | 4051 |
| Oshkūtū'īyeh | city | Ostan-e Kerman | Iran | 26.7313889 | 58.86 | 2841 | 1596 |
| Oshnar | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.6166667 | 47.5 | 5702 | 9056 |
| Oshnaviyeh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.0491667 | 45.1227778 | 4632 | 8761 |
| Oshnavīyeh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.0491667 | 45.1227778 | 4632 | 8761 |
| Oshnovieh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.0491667 | 45.1227778 | 4632 | 8761 |
| Oshnoviyeh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.0491667 | 45.1227778 | 4632 | 8761 |
| Oshnovīeh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.0491667 | 45.1227778 | 4632 | 8761 |
| Oshnovīyeh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.0491667 | 45.1227778 | 4632 | 8761 |
| Oshnurang | city | Ostan-e Azarbayjan-e Gharbi | Iran | 36.7638889 | 45.2388889 | 4717 | 8793 |
| Oshnuzeng | city | Ostan-e Azarbayjan-e Gharbi | Iran | 36.7638889 | 45.2388889 | 4717 | 8793 |
| Oshnār | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.6166667 | 47.5 | 5702 | 9056 |
| Oshnūrang | city | Ostan-e Azarbayjan-e Gharbi | Iran | 36.7638889 | 45.2388889 | 4717 | 8793 |
| Oshtelaghe Olya | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtelaghe Sofla | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtelaghé Olya | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtelaghé Sofla | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtelaq-e Bala | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtelaq-e Bālā | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtelaq-e Pa'in | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtelaq-e Pāʼīn | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshti"n | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8613889 | 46.4858333 | 3038 | 7363 |
| Oshtolaq Bala | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtolaq Bālā | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtolaq Pa'in | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtolaq Pāʼīn | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtolaq-e Sofla | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtolaq-e Soflá | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtolaq-e `Olya | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtolaq-e ‘Olyā | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtoq-e Sofla | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtoq-e Soflá | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 46.9833333 | 5308 | 9009 |
| Oshtoq-e `Olya | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtoq-e ‘Olyā | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 46.9833333 | 5354 | 9009 |
| Oshtor Gard | city | Ostan-e Khuzestan | Iran | 31.8333333 | 49.75 | 2378 | 7298 |
| Oshtor Mel | city | Ostan-e Kordestan | Iran | 35.8833333 | 45.85 | 5465 | 5893 |
| Oshtor Mol | city | Ostan-e Hamadan | Iran | 34.4666667 | 48.4930556 | 6407 | 11170 |
| Oshtorabad | city | Ostan-e Kordestan | Iran | 35.85 | 45.9 | 5193 | 6872 |
| Oshtorak | city | Ostan-e Tehran | Iran | 36.05 | 51.3166667 | 7112 | 47671 |
| Oshtorak | city | Ostan-e Sistan va Baluchestan | Iran | 30.9 | 61.7166667 | 1578 | 1261 |
| Oshtorak | city | Ostan-e Sistan va Baluchestan | Iran | 30.8333333 | 61.75 | 1597 | 866 |
| Oshtoran | city | Ostan-e Hamadan | Iran | 34.6355556 | 48.2969444 | 6017 | 11148 |
| Oshtoreh | city | Ostan-e Lorestan | Iran | 33.4719444 | 47.4375 | 4360 | 7025 |
| Oshtorgan | city | Ostan-e Gilan | Iran | 37.4975 | 49.215 | -13 | 20085 |
| Oshtorgān | city | Ostan-e Gilan | Iran | 37.4975 | 49.215 | -13 | 20085 |
| Oshtorinan | city | Ostan-e Lorestan | Iran | 33.9830556 | 48.6425 | 5652 | 6983 |
| Oshtorinan | city | Ostan-e Lorestan | Iran | 34.0166667 | 48.6427778 | 5902 | 6980 |
| Oshtorjan | city | Ostan-e Esfahan | Iran | 32.4705556 | 51.4730556 | 5587 | 4764 |
| Oshtorjin | city | Ostan-e Hamadan | Iran | 34.7775 | 48.1741667 | 5859 | 11128 |
| Oshtorjān | city | Ostan-e Esfahan | Iran | 32.4705556 | 51.4730556 | 5587 | 4764 |
| Oshtorjīn | city | Ostan-e Hamadan | Iran | 34.7775 | 48.1741667 | 5859 | 11128 |
| Oshtormel | city | Ostan-e Kordestan | Iran | 34.9772222 | 47.0188889 | 5531 | 5971 |
| Oshtormel | city | Ostan-e Hamadan | Iran | 34.4666667 | 48.4930556 | 6407 | 11170 |
| Oshtornian | city | Ostan-e Lorestan | Iran | 34.0166667 | 48.6427778 | 5902 | 6980 |
| Oshtornīān | city | Ostan-e Lorestan | Iran | 34.0166667 | 48.6427778 | 5902 | 6980 |
| Oshtorābād | city | Ostan-e Kordestan | Iran | 35.85 | 45.9 | 5193 | 6872 |
| Oshtorān | city | Ostan-e Hamadan | Iran | 34.6355556 | 48.2969444 | 6017 | 11148 |
| Oshtorīnān | city | Ostan-e Lorestan | Iran | 33.9830556 | 48.6425 | 5652 | 6983 |
| Oshtorīnān | city | Ostan-e Lorestan | Iran | 34.0166667 | 48.6427778 | 5902 | 6980 |
| Oshtowbin | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8613889 | 46.4858333 | 3038 | 7363 |
| Oshtowbīn | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8613889 | 46.4858333 | 3038 | 7363 |
| Oshtubin | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8613889 | 46.4858333 | 3038 | 7363 |
| Oshtuj | city | | Iran | 36.6297222 | 50.7494444 | 3484 | 11170 |
| Oshtī”n | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8613889 | 46.4858333 | 3038 | 7363 |
| Oshtūbīn | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8613889 | 46.4858333 | 3038 | 7363 |
| Oshtūj | city | | Iran | 36.6297222 | 50.7494444 | 3484 | 11170 |
| Oshyan | city | Ostan-e Esfahan | Iran | 32.35 | 51.4166667 | 5505 | 4771 |
| Oshyand | city | Ostan-e Hamadan | Iran | 34.2 | 48.4833333 | 6870 | 11207 |
| Oshyān | city | Ostan-e Esfahan | Iran | 32.35 | 51.4166667 | 5505 | 4771 |
| Oshān | city | Ostan-e Azarbayjan-e Gharbi | Iran | 37.5033333 | 46.3041667 | 6161 | 9069 |
| Oskandiyan | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 44.7166667 | 6568 | 8649 |
| Oskandīyān | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 44.7166667 | 6568 | 8649 |
| Oskelu | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8391667 | 46.9391667 | 6765 | 8902 |
| Oskelū | city | Ostan-e Azarbayjan-e Gharbi | Iran | 38.8391667 | 46.9391667 | 6765 | 8902 |
| Oskol-e Bala | city | Ostan-e Kordestan | Iran | 35.4727778 | 46.0597222 | 5501 | 6081 |
| Oskol-e Bālā | city | Ostan-e Kordestan | Iran | 35.4727778 | 46.0597222 | 5501 | 6081 |
| Oskol-e Sofla | city | Ostan-e Kordestan | Iran | 35.4666667 | 46.0636111 | 5777 | 6081 |
| Oskol-e Soflá | city | Ostan-e Kordestan | Iran | 35.4666667 | 46.0636111 | 5777 | 6081 |
| Oskolak | city | Ostan-e Gilan | Iran | 37.044444 | 49.57 | 1561 | 20353 |
| Oskoo Mahalleh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Oskotu | city | Ostan-e Kerman | Iran | 26.7313889 | 58.86 | 2841 | 1596 |
| Oskotū | city | Ostan-e Kerman | Iran | 26.7313889 | 58.86 | 2841 | 1596 |
| Osku | city | Ostan-e Azarbayjan-e Gharbi | Iran | 37.9108333 | 46.1408333 | 5183 | 9023 |
| Osku Mahalieh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Osku Mahalleh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Oskul Deh | city | Ostan-e Tehran | Iran | 36.0333333 | 50.8333333 | 6341 | 47698 |
| Oskuq | city | | Iran | 37.4433333 | 48.1475 | 4350 | 9079 |
| Oskū | city | Ostan-e Azarbayjan-e Gharbi | Iran | 37.9108333 | 46.1408333 | 5183 | 9023 |
| Oskū Mahalīeh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Oskū Maḩalleh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Oskūl Deh | city | Ostan-e Tehran | Iran | 36.0333333 | 50.8333333 | 6341 | 47698 |
| Oskūq | city | | Iran | 37.4433333 | 48.1475 | 4350 | 9079 |
| Osqul | city | Ostan-e Khorasan | Iran | 32.6194444 | 59.335 | 5944 | 2892 |
| Osta-ye Bakharz | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Osta-ye Bala | city | Ostan-e Khorasan | Iran | 35.4411111 | 61.0844444 | 3100 | 2800 |
| Osta-ye Pa'in | city | Ostan-e Khorasan | Iran | 35.4666667 | 61.1166667 | 3136 | 2797 |
| Ostab | city | Ostan-e Khorasan | Iran | 32.7411111 | 59.13 | 6643 | 2889 |
| Ostad | city | Ostan-e Khorasan | Iran | 37.6833333 | 57.1833333 | 2470 | 2717 |
| Ostad | city | Ostan-e Khorasan | Iran | 37.1697222 | 58.030556 | 5154 | 2735 |
| Ostad | city | Ostan-e Khorasan | Iran | 34.1275 | 58.7722222 | 4947 | 2842 |
| Ostad | city | Ostan-e Khorasan | Iran | 32.7411111 | 59.13 | 6643 | 2889 |
| Ostad | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Ostad Bakharz | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Ostad Deh | city | Ostan-e Khorasan | Iran | 33.85 | 59.0833333 | 5314 | 2853 |
| Ostad Kolayeh | city | Ostan-e Gilan | Iran | 37.1158333 | 50.2177778 | -9 | 20343 |
| Ostad Teymurtash | city | Ostan-e Khorasan | Iran | 37.5 | 57.15 | 4429 | 2724 |
| Ostahu'iyeh | city | Ostan-e Kerman | Iran | 30.3630556 | 55.4372222 | 7417 | 1545 |
| Ostaluljabin | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 47.5833333 | 6354 | 9009 |
| Ostambeyglu | city | | Iran | 39.1 | 47.2 | 2434 | 8873 |
| Ostan-e Markazi | city | Ostan-e Markazi | Iran | 35.1666667 | 51 | 3743 | 48196 |
| Ostan-e Tehran | city | Ostan-e Markazi | Iran | 35.1666667 | 51 | 3743 | 48196 |
| Ostay | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Ostay | city | Ostan-e Khorasan | Iran | 35.4411111 | 61.0844444 | 3100 | 2800 |
| Ostay-ye Pa'in | city | Ostan-e Khorasan | Iran | 35.4666667 | 61.1166667 | 3136 | 2797 |
| Ostay-ye Sofla | city | Ostan-e Khorasan | Iran | 35.4666667 | 61.1166667 | 3136 | 2797 |
| Ostay-ye `Olya | city | Ostan-e Khorasan | Iran | 35.4411111 | 61.0844444 | 3100 | 2800 |
| Ostovarchi | city | Ostan-e Esfahan | Iran | 32.7161111 | 51.7311111 | 5088 | 4750 |
| Ostovārchī | city | Ostan-e Esfahan | Iran | 32.7161111 | 51.7311111 | 5088 | 4750 |
| Ostuh | city | | Iran | 34.3244444 | 49.2433333 | 5626 | 5282 |
| Ostuj | city | | Iran | 34.8941667 | 50.3675 | 3208 | 5244 |
| Ostunrash | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 44.4166667 | 8034 | 8649 |
| Ostur | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.7833333 | 47.9333333 | 5475 | 9037 |
| Ostur | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.5166667 | 47.9666667 | 3188 | 9069 |
| Ostur | city | Ostan-e Markazi | Iran | 35.6872222 | 50.8775 | 3776 | 47505 |
| Ostur | city | Ostan-e Kerman | Iran | 29.3466667 | 56.1383333 | 6653 | 1559 |
| Ostureh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0666667 | 44.45 | 6817 | 8640 |
| Ostā-ye Bākharz | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Ostā-ye Bālā | city | Ostan-e Khorasan | Iran | 35.4411111 | 61.0844444 | 3100 | 2800 |
| Ostā-ye Pā'īn | city | Ostan-e Khorasan | Iran | 35.4666667 | 61.1166667 | 3136 | 2797 |
| Ostāb | city | Ostan-e Khorasan | Iran | 32.7411111 | 59.13 | 6643 | 2889 |
| Ostād | city | Ostan-e Khorasan | Iran | 37.6833333 | 57.1833333 | 2470 | 2717 |
| Ostād | city | Ostan-e Khorasan | Iran | 37.1697222 | 58.030556 | 5154 | 2735 |
| Ostād | city | Ostan-e Khorasan | Iran | 34.1275 | 58.7722222 | 4947 | 2842 |
| Ostād | city | Ostan-e Khorasan | Iran | 32.7411111 | 59.13 | 6643 | 2889 |
| Ostād | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Ostād Bākharz | city | Ostan-e Khorasan | Iran | 34.8375 | 60.3086111 | 4750 | 2818 |
| Ostād Deh | city | Ostan-e Khorasan | Iran | 33.85 | 59.0833333 | 5314 | 2853 |
| Ostād Kolāyeh | city | Ostan-e Gilan | Iran | 37.1158333 | 50.2177778 | -9 | 20343 |
| Ostād Teymūrtāsh | city | Ostan-e Khorasan | Iran | 37.5 | 57.15 | 4429 | 2724 |
| Ostāhū'īyeh | city | Ostan-e Kerman | Iran | 30.3630556 | 55.4372222 | 7417 | 1545 |
| Ostāmbeyglū | city | | Iran | 39.1 | 47.2 | 2434 | 8873 |
| Ostān | city | Ostan-e Markazi | Iran | 35.1666667 | 51 | 3743 | 48196 |
| Ostān-e Markazī | city | Ostan-e Markazi | Iran | 35.1666667 | 51 | 3743 | 48196 |
| Ostān-e Tehrān | city | Ostan-e Markazi | Iran | 35.1666667 | 51 | 3743 | 48196 |
| Ostāy | city | Ostan-e Khorasan | Iran | 35.4411111 | 61.0844444 | 3100 | 2800 |
| Ostāy-ye Pā'īn | city | Ostan-e Khorasan | Iran | 35.4666667 | 61.1166667 | 3136 | 2797 |
| Ostāy-ye Soflá | city | Ostan-e Khorasan | Iran | 35.4666667 | 61.1166667 | 3136 | 2797 |
| Ostāy-ye ‘Olyā | city | Ostan-e Khorasan | Iran | 35.4411111 | 61.0844444 | 3100 | 2800 |
| Ostūh | city | | Iran | 34.3244444 | 49.2433333 | 5626 | 5282 |
| Ostūj | city | | Iran | 34.8941667 | 50.3675 | 3208 | 5244 |
| Ostūnrash | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0166667 | 44.4166667 | 8034 | 8649 |
| Ostūr | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.7833333 | 47.9333333 | 5475 | 9037 |
| Ostūr | city | Ostan-e Azarbayjan-e Sharqi | Iran | 37.5166667 | 47.9666667 | 3188 | 9069 |
| Ostūr | city | Ostan-e Markazi | Iran | 35.6872222 | 50.8775 | 3776 | 47505 |
| Ostūreh | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0666667 | 44.45 | 6817 | 8640 |
| Osun | city | Ostan-e Tehran | Iran | 35.85 | 51.4166667 | 6758 | 47797 |
| Osā | city | | Iran | 36.55 | 53.25 | 508 | 11184 |
| Osţalūljabīn | city | Ostan-e Azarbayjan-e Sharqi | Iran | 38.0333333 | 47.5833333 | 6354 | 9009 |
| Osţūr | city | Ostan-e Kerman | Iran | 29.3466667 | 56.1383333 | 6653 | 1559 |
| Osūn | city | Ostan-e Tehran | Iran | 35.85 | 51.4166667 | 6758 | 47797 |