| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Oia | city | Piemonte | Italy | 44.80 | 7.70 | 830 | 19572 |
| Oia | city | Aveiro | Portugal | 40.54 | -8.54 | 226 | 20476 |
| Oiafaiyufa | city | Eastern Highlands | Papua New Guinea | -6.17 | 145.35 | 5029 | 12030 |
| Oiage | city | Kagawa | Japan | 34.15 | 133.82 | 830 | 30759 |
| Oiagni Mei | city | Abidjan | Cote D'Ivoire (Ivory Coast) | 5.52 | -4.37 | 249 | 7003 |
| Oiamaama | city | Soloman Islands | -9.12 | 161.22 | 0 | 1662 | |
| Oiambesse Lalia | city | Labe | Guinea | 11.35 | -11.82 | 2509 | 2086 |
| Oiams | city | //Karas | Namibia | -26.38 | 17.25 | 4189 | 0 |
| Oian | city | Nordland | Norway | 65.37 | 12.23 | 328 | 439 |
| Oian | city | Sor-Trondelag | Norway | 63.75 | 10.25 | 1049 | 596 |
| Oianenehona | city | Milne Bay | Papua New Guinea | -10.28 | 150.47 | 1912 | 11239 |
| Oiano | city | Lazio | Italy | 42.25 | 13.07 | 1669 | 1621 |
| Oiapoque | city | Amapa | Brazil | 3.83 | -51.83 | 85 | 15499 |
| Oiapu | city | Gulf | Papua New Guinea | -8.50 | 146.32 | 347 | 159 |
| Oiardo | city | Euskadi | Spain | 42.99 | -2.93 | 2509 | 2842 |
| Oiarhmani | city | Souss-Massa-Draa | Morocco | 29.82 | -9.45 | 1253 | 4870 |
| Oiarip | city | Southern Highlands | Papua New Guinea | -6.20 | 143.68 | 5869 | 5509 |
| Oiariua | city | Zambezia | Mozambique | -16.37 | 37.44 | 997 | 2682 |
| Oiasca | city | Arges | Romania | 44.87 | 24.78 | 1669 | 17563 |
| Oiasse | city | Valle d'Aosta | Italy | 45.85 | 7.37 | 4189 | 882 |
| Oiavold | city | Sor-Trondelag | Norway | 62.78 | 10.92 | 2887 | 100 |
| Oiavoll | city | Sor-Trondelag | Norway | 62.78 | 10.92 | 2887 | 100 |
| Oiawaa | city | Soloman Islands | -9.42 | 161.20 | 75 | 2047 |