| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Onac | city | Bursa Ili | Turkey | 40.1 | 28.6166667 | 1384 | 13917 |
| Onacak | city | Burdur Ili | Turkey | 37.65 | 29.9333333 | 5183 | 4292 |
| Onackoy | city | Bursa Ili | Turkey | 40.1 | 28.6166667 | 1384 | 13917 |
| Onagil | city | Van Ili | Turkey | 38.2277778 | 43.2563889 | 7854 | 4869 |
| Onak | city | Bitlis Ili | Turkey | 38.3166667 | 42.2 | 5465 | 5412 |
| Onanyagan | city | Tokat Ili | Turkey | 40.6 | 36.9 | 882 | 8744 |
| Onar | city | Malatya Ili | Turkey | 38.9666667 | 38.5666667 | 3805 | 7646 |
| Onaran | city | Sivas Ili | Turkey | 39.2 | 37.55 | 5354 | 3025 |
| Onardi | city | Sanliurfa Ili | Turkey | 37.3833333 | 39.8333333 | 2559 | 7459 |
| Onardı | city | Sanliurfa Ili | Turkey | 37.3833333 | 39.8333333 | 2559 | 7459 |
| Onari | city | Sivas Ili | Turkey | 40.05 | 38.45 | 5078 | 3624 |
| Onarı | city | Sivas Ili | Turkey | 40.05 | 38.45 | 5078 | 3624 |
| Onatli | city | Malatya Ili | Turkey | 38.2333333 | 38.0833333 | 5321 | 7917 |
| Onatlı | city | Malatya Ili | Turkey | 38.2333333 | 38.0833333 | 5321 | 7917 |
| Onaç | city | Bursa Ili | Turkey | 40.1 | 28.6166667 | 1384 | 13917 |
| Onaçköy | city | Bursa Ili | Turkey | 40.1 | 28.6166667 | 1384 | 13917 |
| Onağıl | city | Van Ili | Turkey | 38.2277778 | 43.2563889 | 7854 | 4869 |
| Onbasilar | city | Tunceli Ili | Turkey | 38.9833333 | 39.55 | 3244 | 2133 |
| Onbasilar | city | | Turkey | 37.54 | 44.5463889 | 6223 | 3436 |
| Onbaşılar | city | Tunceli Ili | Turkey | 38.9833333 | 39.55 | 3244 | 2133 |
| Onbaşılar | city | | Turkey | 37.54 | 44.5463889 | 6223 | 3436 |
| Onbirnisan | city | Sanliurfa Ili | Turkey | 37.0286111 | 38.4369444 | 1683 | 7497 |
| Onbudak | city | Sirnak Ili | Turkey | 37.4819444 | 42.7480556 | 4107 | 5513 |
| Onbulak | city | | Turkey | 39.8166667 | 43.45 | 7263 | 4357 |
| Oncu | city | | Turkey | 37.3666667 | 44.4 | 5898 | 3141 |
| Oncul | city | Sanliurfa Ili | Turkey | 36.7166667 | 39.0166667 | 1079 | 6615 |
| Oncul | city | | Turkey | 41.2411111 | 43.1652778 | 5885 | 3891 |
| Onculer | city | Gaziantep Ili | Turkey | 36.7833333 | 37.85 | 1558 | 18046 |
| Onculer | city | | Turkey | 37.8833333 | 44.1333333 | 6410 | 3751 |
| Onculu | city | Diyarbakir Ili | Turkey | 37.7166667 | 40.5333333 | 2191 | 9159 |
| Oncupinar | city | Kilis Ili | Turkey | 36.6438889 | 37.0875 | 1889 | 18108 |
| Ondul | city | Agri Ili | Turkey | 39.4 | 42.8166667 | 6371 | 5380 |
| Onerler | city | Tekirdag Ili | Turkey | 41.1555556 | 27.8802778 | 652 | 8463 |
| Onevler | city | Adiyaman Ili | Turkey | 38.1011111 | 39.1486111 | 3129 | 10636 |
| Onieh | city | Ordu Ili | Turkey | 41.1313889 | 37.2825 | 3 | 6881 |
| Onortak | city | Sanliurfa Ili | Turkey | 36.75 | 38.8333333 | 1227 | 6694 |
| Onsebgen | city | Elazig Ili | Turkey | 38.3666667 | 39.4 | 5160 | 7933 |
| Onsen | city | Kahramanmaras Ili | Turkey | 37.5 | 36.8 | 2339 | 8201 |
| Onsenhopuru | city | Kahramanmaras Ili | Turkey | 37.5 | 36.8 | 2339 | 8201 |
| Onsepgen | city | Elazig Ili | Turkey | 38.3666667 | 39.4 | 5160 | 7933 |
| Onsepken | city | Elazig Ili | Turkey | 38.3666667 | 39.4 | 5160 | 7933 |
| Ontepe | city | | Turkey | 37.05 | 44.2916667 | 2956 | 3508 |
| Onurlu | city | Erzincan Ili | Turkey | 39.8333333 | 38.7833333 | 6358 | 2926 |
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