| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Op'yong | city | Gangwon | Korea, Republic of (South) | 37.13 | 128.89 | 3349 | 5072 |
| Oppak-kol | city | Gangwon | Korea, Republic of (South) | 37.55 | 128.27 | 2509 | 453 |
| Oppak-kol | city | Gangwon | Korea, Republic of (South) | 37.66 | 128.83 | 1082 | 16924 |
| Oppawi | city | Gangwon | Korea, Republic of (South) | 37.40 | 129.10 | 190 | 11329 |
| Opyeong | city | Gangwon | Korea, Republic of (South) | 38.45 | 128.44 | 26 | 9017 |