| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Op'yong | city | Chungnam | Korea, Republic of (South) | 36.27 | 127.02 | 42 | 8842 |
| Oppae | city | Chungnam | Korea, Republic of (South) | 36.26 | 126.94 | 16 | 33936 |
| Oppak-kol | city | Chungnam | Korea, Republic of (South) | 36.68 | 126.39 | 114 | 6669 |
| Opsong-dong | city | Chungnam | Korea, Republic of (South) | 36.85 | 127.14 | 111 | 91831 |
| Op’yŏng | city | Chungnam | Korea, Republic of (South) | 36.27 | 127.02 | 42 | 8842 |