| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Oi | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7166667 | 128.5666667 | 823 | 49694 |
| Oi-dong | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7166667 | 128.5666667 | 823 | 49694 |
| Oi-dong | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7166667 | 128.9666667 | 682 | 17764 |
| Oi-gol | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7166667 | 128.9666667 | 682 | 17764 |
| Oido | city | Kyonggi-do | Korea, Republic of (South) | 37.3333333 | 126.7 | 0 | 9713 |
| Oil-li | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7919444 | 129.4427778 | 190 | 17700 |
| Oil-li | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7833333 | 129.45 | 285 | 17341 |
| Oim-ni | city | Cholla-namdo | Korea, Republic of (South) | 34.7833333 | 126.15 | 39 | 8509 |
| Oin | city | Kyongsang-namdo | Korea, Republic of (South) | 35.7566667 | 128.0197222 | 2070 | 38356 |
| Oin-dong | city | Kyongsang-namdo | Korea, Republic of (South) | 35.7566667 | 128.0197222 | 2070 | 38356 |
| Oin-ri | city | Cholla-namdo | Korea, Republic of (South) | 34.5911111 | 126.0311111 | 88 | 6635 |
| Oir-ri | city | Kyongsang-bukto | Korea, Republic of (South) | 35.7919444 | 129.4427778 | 190 | 17700 |