| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Oeynar | city | | Iran | 37.7833333 | 56.1 | 3667 | 9340 |
| Oja'beyt | city | | Iran | 36.4911111 | 51.1433333 | 4504 | 11197 |
| Ojabandan | city | | Iran | 36.5166667 | 52.8666667 | 52 | 11193 |
| Ojak | city | | Iran | 36.4 | 52.7 | 98 | 11207 |
| Ojak Sar | city | | Iran | 36.65 | 51.6 | -91 | 3099 |
| Ojak Sar | city | | Iran | 36.6508333 | 52.6002778 | -42 | 10880 |
| Ojaq Sara | city | | Iran | 36.3972222 | 52.6386111 | 196 | 11207 |
| Oji Talar | city | | Iran | 36.5166667 | 52.7833333 | 39 | 11193 |
| Ojā'beyt | city | | Iran | 36.4911111 | 51.1433333 | 4504 | 11197 |
| Ojābandān | city | | Iran | 36.5166667 | 52.8666667 | 52 | 11193 |
| Ojāk | city | | Iran | 36.4 | 52.7 | 98 | 11207 |
| Ojāk Sar | city | | Iran | 36.65 | 51.6 | -91 | 3099 |
| Ojāk Sar | city | | Iran | 36.6508333 | 52.6002778 | -42 | 10880 |
| Ojāq Sarā | city | | Iran | 36.3972222 | 52.6386111 | 196 | 11207 |
| Ojī Tālār | city | | Iran | 36.5166667 | 52.7833333 | 39 | 11193 |
| Okarka | city | | Iran | 36.5755556 | 53.44 | 954 | 11184 |
| Okarkā | city | | Iran | 36.5755556 | 53.44 | 954 | 11184 |
| Oniseh | city | | Iran | 36.0138889 | 52.6672222 | 9301 | 11263 |
| Onīseh | city | | Iran | 36.0138889 | 52.6672222 | 9301 | 11263 |
| Oojaksar | city | | Iran | 36.65 | 51.6 | -91 | 3099 |
| Oomal | city | | Iran | 36.7175 | 53.0916667 | -32 | 11156 |
| Ooz Kala | city | | Iran | 36.1666667 | 51.6333333 | 9117 | 11239 |
| Orjanli | city | | Iran | 37.4455556 | 55.6705556 | 3412 | 11057 |
| Orjanlī | city | | Iran | 37.4455556 | 55.6705556 | 3412 | 11057 |
| Ormak Kola | city | | Iran | 36.6 | 52.3 | -6 | 9934 |
| Ormak Kolā | city | | Iran | 36.6 | 52.3 | -6 | 9934 |
| Orost | city | | Iran | 36.3347222 | 53.8186111 | 5124 | 11212 |
| Osa | city | | Iran | 36.55 | 53.25 | 508 | 11184 |
| Oshtuj | city | | Iran | 36.6297222 | 50.7494444 | 3484 | 11170 |
| Oshtūj | city | | Iran | 36.6297222 | 50.7494444 | 3484 | 11170 |
| Oskoo Mahalleh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Osku Mahalieh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Osku Mahalleh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Oskū Mahalīeh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Oskū Maḩalleh | city | | Iran | 36.4072222 | 52.3227778 | 580 | 11207 |
| Osā | city | | Iran | 36.55 | 53.25 | 508 | 11184 |
| Otaq Sar | city | | Iran | 36.3972222 | 52.6386111 | 196 | 11207 |
| Otaq Sara | city | | Iran | 36.3333333 | 51.5333333 | 5403 | 11221 |
| Otaq Sara | city | | Iran | 36.1666667 | 52.05 | 7939 | 11239 |
| Otaq Sara | city | | Iran | 36.1 | 52.15 | 5147 | 11249 |
| Otaqsi | city | | Iran | 36.1 | 52.6666667 | 9389 | 11249 |
| Otu | city | | Iran | 36.2361111 | 53.088889 | 3031 | 11235 |
| Otū | city | | Iran | 36.2361111 | 53.088889 | 3031 | 11235 |
| Ow Mal | city | | Iran | 36.7175 | 53.0916667 | -32 | 11156 |
| Ow Māl | city | | Iran | 36.7175 | 53.0916667 | -32 | 11156 |
| Owbar | city | | Iran | 36.0438889 | 52.955 | 5288 | 11254 |
| Owbār | city | | Iran | 36.0438889 | 52.955 | 5288 | 11254 |
| Owja Mahalleh | city | | Iran | 36.6166667 | 53.0833333 | 49 | 11179 |
| Owjabandan | city | | Iran | 36.5333333 | 52.3833333 | 45 | 11193 |
| Owjā Maḩalleh | city | | Iran | 36.6166667 | 53.0833333 | 49 | 11179 |
| Owjābandān | city | | Iran | 36.5333333 | 52.3833333 | 45 | 11193 |
| Owkreka | city | | Iran | 36.5755556 | 53.44 | 954 | 11184 |
| Owkrekā | city | | Iran | 36.5755556 | 53.44 | 954 | 11184 |
| Owlar | city | | Iran | 36.6227778 | 53.7386111 | 4307 | 11179 |
| Owlika | city | | Iran | 36.2405556 | 53.4180556 | 3457 | 11235 |
| Owlār | city | | Iran | 36.6227778 | 53.7386111 | 4307 | 11179 |
| Owlīkā | city | | Iran | 36.2405556 | 53.4180556 | 3457 | 11235 |
| Owmal | city | | Iran | 36.6191667 | 53.2816667 | 324 | 11179 |
| Owmāl | city | | Iran | 36.6191667 | 53.2816667 | 324 | 11179 |
| Owzkola | city | | Iran | 36.1794444 | 51.6505556 | 7440 | 11239 |
| Owzkolā | city | | Iran | 36.1794444 | 51.6505556 | 7440 | 11239 |
| Owzud | city | | Iran | 36.1166667 | 53.0666667 | 2398 | 11249 |
| Owzūd | city | | Iran | 36.1166667 | 53.0666667 | 2398 | 11249 |
| Ozar | city | | Iran | 36.5333333 | 51.3 | 2221 | 11193 |
| Ozār | city | | Iran | 36.5333333 | 51.3 | 2221 | 11193 |
| Oţāq Sar | city | | Iran | 36.3972222 | 52.6386111 | 196 | 11207 |
| Oţāq Sarā | city | | Iran | 36.3333333 | 51.5333333 | 5403 | 11221 |
| Oţāq Sarā | city | | Iran | 36.1666667 | 52.05 | 7939 | 11239 |
| Oţāq Sarā | city | | Iran | 36.1 | 52.15 | 5147 | 11249 |
| Oţāqsī | city | | Iran | 36.1 | 52.6666667 | 9389 | 11249 |
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