| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ουάσιγκτον | city | District of Columbia | United States | 38.90 | -77.04 | 9 | |
| Ουάσινγκτον | city | District of Columbia | United States | 38.90 | -77.04 | 9 | |
| Ουέλλιγκτον | city | New Zealand | -41.30 | 174.78 | 68 | 82480 | |
| Ουέλλινγκτον | city | New Zealand | -41.30 | 174.78 | 68 | 82480 | |
| Ουαγκαντουγκού | city | Centre | Burkina Faso | 12.37 | -1.52 | 1003 | 301121 |
| Ουαλεντια | city | Comunitat Valenciana | Spain | 39.47 | -0.37 | 26 | 494957 |
| Ουζούν Κιοπρού | city | Edirne | Turkey | 41.27 | 26.69 | 111 | 33631 |
| Ουιτσίτα | city | Kansas | United States | 37.69 | -97.34 | 1669 | |
| Ουκμεργκέ | city | Ukmerge | Lithuania | 55.25 | 24.75 | 209 | 22016 |
| Ουλάν Μπατόρ | city | Ulaanbaatar | Mongolia | 47.92 | 106.92 | 4215 | 154220 |
| Ουλάν Ουντέ | city | Buryatiya | Russia | 51.83 | 107.61 | 1669 | 94918 |
| Ουλιάνοφσκ | city | Ul'yanovskaya Oblast' | Russia | 54.33 | 48.39 | 830 | 143391 |
| Ουλμ | city | Baden-Wurttemberg | Germany | 48.40 | 9.97 | 1669 | 89095 |
| Ουλούαγατς | city | Nigde | Turkey | 38.05 | 34.83 | 5029 | 3725 |
| Ουμπαγιά | city | Kentriki Makedonia | Greece | 41.25 | 23.28 | 88 | 6720 |
| Ουπνινκάι | city | Kauno Apskritis | Lithuania | 55.10 | 24.53 | 226 | 826 |
| Ουρανούπολη | city | Kentriki Makedonia | Greece | 40.33 | 23.98 | 0 | 1227 |
| Ουρανούπολις | city | Kentriki Makedonia | Greece | 40.33 | 23.98 | 0 | 1227 |
| Ουρανόπολη | city | Kentriki Makedonia | Greece | 40.33 | 23.98 | 0 | 1227 |
| Ουρανόπολις | city | Kentriki Makedonia | Greece | 40.33 | 23.98 | 0 | 1227 |
| Ουρανός | city | Thessalia | Greece | 39.62 | 21.64 | 830 | 2909 |
| Ουρουάπαν | city | Michoacan de Ocampo | Mexico | 19.41 | -102.06 | 5308 | 132087 |
| Ουρούμτσι | city | Xinjiang | China | 43.81 | 87.63 | 2864 | 221697 |
| Ουσάκ | city | Usak | Turkey | 38.67 | 29.41 | 3349 | 87614 |
| Ουσουάια | city | Tierra del Fuego, Antartida e Islas del Atlantico Sur | Argentina | -54.80 | -68.30 | 0 | 16656 |
| Ουσουλουτάν | city | Usulutan | El Salvador | 13.35 | -88.45 | 301 | 54710 |
| Ουτένα | city | Utena | Lithuania | 55.50 | 25.60 | 370 | 23370 |
| Ουτρέχτη | city | Utrecht | Netherlands | 52.09 | 5.12 | 3 | 171248 |
| Ουψάλα | city | Stockholm | Sweden | 59.87 | 17.63 | 22 | 20271 |
| Ουόνσαν | city | Kangwon | Korea, Dem. Peoples Rep. of (North) | 39.15 | 127.44 | 45 | 165173 |
| Ουόντζου | city | Gangwon | Korea, Republic of (South) | 37.35 | 127.95 | 830 | 89240 |
| Ουόνχουνγκ-ντονγκ | city | Gyeonggi | Korea, Republic of (South) | 37.66 | 126.88 | 88 | 334371 |
| Ουόρστερ | city | Massachusetts | United States | 42.26 | -71.80 | 830 |