| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Olka Sara | city | Gilan | Iran | 37.13 | 50.27 | -1689 | 30142 |
| Omam | city | Gilan | Iran | 36.89 | 50.07 | 6184 | 8802 |
| Omandan | city | Gilan | Iran | 37.40 | 49.25 | -1689 | 69861 |
| Omesheh | city | Gilan | Iran | 37.23 | 49.72 | 32 | 89629 |
| Omm-e Shah | city | Gilan | Iran | 37.23 | 49.72 | 32 | 89629 |
| Ommsheh | city | Gilan | Iran | 37.23 | 49.72 | 32 | 89629 |
| Omshāsehveh | city | Gilan | Iran | 37.23 | 49.72 | 32 | 89629 |
| Orbabun | city | Gilan | Iran | 36.97 | 49.91 | 4189 | 11771 |
| Oshtorgan | city | Gilan | Iran | 37.51 | 49.23 | -1689 | 7952 |
| Oskolak | city | Gilan | Iran | 37.01 | 49.58 | 830 | 4598 |
| Osqofnesar | city | Gilan | Iran | 37.44 | 49.21 | 3 | 26037 |
| Ostad Kalayeh-ye Bala Mahalleh | city | Gilan | Iran | 37.13 | 50.21 | 3 | 45412 |
| Ostad Kalayeh-ye Pa'in Mahalleh | city | Gilan | Iran | 37.12 | 50.23 | 3 | 31071 |
| Ostad Kolayeh | city | Gilan | Iran | 37.12 | 50.22 | -1689 | 30516 |
| Ostaleh Kenar | city | Gilan | Iran | 37.53 | 48.88 | 2719 | 2980 |
| Ostād Kalāyeh-ye Pā’īn Maḩalleh | city | Gilan | Iran | 37.12 | 50.23 | 3 | 31071 |
| Otak Saray | city | Gilan | Iran | 37.80 | 48.91 | 232 | 19921 |
| Otaq Sarai | city | Gilan | Iran | 37.80 | 48.91 | 232 | 19921 |
| Otaq Saray | city | Gilan | Iran | 37.80 | 48.91 | 232 | 19921 |
| Otaqvar | city | Gilan | Iran | 37.02 | 50.44 | 830 | 17836 |
| Otowr Sarā | city | Gilan | Iran | 37.25 | 49.26 | 108 | 37717 |
| Otūr Sarā | city | Gilan | Iran | 37.25 | 49.26 | 108 | 37717 |
| Owla Ku | city | Gilan | Iran | 37.80 | 48.83 | 830 | 6458 |
| Owlaru | city | Gilan | Iran | 37.78 | 48.80 | 1669 | 2980 |
| Owlaskhuni | city | Gilan | Iran | 37.69 | 48.77 | 2739 | 2980 |
| Owleh Chāl | city | Gilan | Iran | 37.88 | 48.78 | 2509 | 2980 |
| Owlesbelenga | city | Gilan | Iran | 37.30 | 48.96 | 4189 | 10414 |
| Owlesbelengāh | city | Gilan | Iran | 37.30 | 48.96 | 4189 | 10414 |
| Owlest | city | Gilan | Iran | 37.41 | 48.88 | 4189 | 2947 |
| Owlestan | city | Gilan | Iran | 37.46 | 48.94 | 4189 | 2980 |
| Owlestkhvār | city | Gilan | Iran | 37.47 | 49.02 | 2637 | 2980 |
| Owlom | city | Gilan | Iran | 37.46 | 49.09 | 278 | 5030 |
| OwlurdI | city | Gilan | Iran | 36.93 | 49.98 | 5301 | 11771 |
| Owmandan | city | Gilan | Iran | 37.40 | 49.25 | -1689 | 69861 |
| Owmandan | city | Gilan | Iran | 37.39 | 49.26 | -1689 | 69952 |
| Ownar Mahalleh | city | Gilan | Iran | 38.09 | 48.90 | 144 | 1619 |
| Owndim | city | Gilan | Iran | 36.71 | 49.87 | 4189 | 4619 |
| Owndīm Sarā | city | Gilan | Iran | 37.04 | 50.41 | -1689 | 20853 |
| Owranbeh | city | Gilan | Iran | 37.42 | 48.88 | 4189 | 2970 |
| Owrband | city | Gilan | Iran | 37.42 | 48.89 | 4189 | 2975 |
| Owri | city | Gilan | Iran | 37.31 | 48.95 | 6020 | 10203 |
| Owrma | city | Gilan | Iran | 37.46 | 49.04 | 1669 | 2980 |
| Owrmamalal | city | Gilan | Iran | 37.46 | 49.04 | 1669 | 2980 |
| Owrmā | city | Gilan | Iran | 37.45 | 49.02 | 2066 | 2980 |
| Owrmāmalāl | city | Gilan | Iran | 37.45 | 49.02 | 2066 | 2980 |
| Owshian Herat Bar | city | Gilan | Iran | 36.99 | 50.52 | -1689 | 15036 |
| Owtar | city | Gilan | Iran | 37.97 | 48.93 | -1689 | 1500 |
| Owtar | city | Gilan | Iran | 37.96 | 48.93 | -1689 | 1553 |
| Owtar Mahalleh | city | Gilan | Iran | 37.96 | 48.93 | -1689 | 1553 |
| Owtār | city | Gilan | Iran | 38.16 | 48.89 | -1689 | 1625 |
| Owvash | city | Gilan | Iran | 37.47 | 48.90 | 4458 | 2980 |
| Owyanem | city | Gilan | Iran | 36.94 | 49.88 | 5423 | 11771 |
| Ozgom | city | Gilan | Iran | 37.35 | 49.34 | -1689 | 82309 |
| Oţāqvar | city | Gilan | Iran | 37.11 | 50.11 | 830 | 37679 |