| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Op'a-ri | city | P'yongnam | Korea, Dem. Peoples Rep. of (North) | 39.33 | 125.64 | 216 | 37909 |
| Op'a-rodongjagu | city | P'yongnam | Korea, Dem. Peoples Rep. of (North) | 39.33 | 125.64 | 216 | 37909 |
| Op'o | city | Korea, Republic of (South) | 34.70 | 128.62 | 0 | 6457 | |
| Op'o | city | Gyeongnam | Korea, Republic of (South) | 34.70 | 128.61 | 0 | 6106 |
| Op'o-ri | city | Hamnam | Korea, Dem. Peoples Rep. of (North) | 39.43 | 127.39 | 3 | 24333 |
| Op'o-ri | city | Korea, Dem. Peoples Rep. of (North) | 38.18 | 126.27 | 104 | 17420 | |
| Op'o-ri | city | Hamnam | Korea, Dem. Peoples Rep. of (North) | 40.14 | 128.44 | 42 | 26330 |
| Op'ret'i | city | Kvemo Kartli | Georgia | 41.25 | 44.63 | 3513 | 5993 |
| Op'shkvit'i | city | Georgia | 42.15 | 42.61 | 249 | 10564 | |
| Op'ung-dong | city | Yanggang | Korea, Dem. Peoples Rep. of (North) | 41.47 | 128.30 | 3513 | 3798 |
| Op'urch'khet'i | city | Georgia | 42.35 | 42.71 | 898 | 13338 | |
| Op'yong | city | Hamnam | Korea, Dem. Peoples Rep. of (North) | 40.18 | 128.16 | 830 | 18378 |
| Op'yong | city | Hwangnam | Korea, Dem. Peoples Rep. of (North) | 38.13 | 125.69 | 830 | 15756 |
| Op'yong | city | Korea, Dem. Peoples Rep. of (North) | 37.95 | 125.70 | 0 | 7460 | |
| Op'yong | city | Gyeonggi | Korea, Republic of (South) | 37.27 | 127.07 | 236 | 471262 |
| Op'yong | city | Gangwon | Korea, Republic of (South) | 37.13 | 128.89 | 3349 | 5072 |
| Op'yong | city | Chungnam | Korea, Republic of (South) | 36.27 | 127.02 | 42 | 8842 |
| Op'yong-dong | city | Hwangnam | Korea, Dem. Peoples Rep. of (North) | 37.96 | 125.83 | 13 | 17799 |
| Op'yong-dong | city | Hwangnam | Korea, Dem. Peoples Rep. of (North) | 38.45 | 125.62 | 19 | 34522 |
| Op'yong-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.06 | 128.31 | 347 | 45085 |
| Op'yong-ni | city | Hamnam | Korea, Dem. Peoples Rep. of (North) | 40.72 | 128.48 | 1669 | 7301 |
| Op'yong-ni | city | Hamnam | Korea, Dem. Peoples Rep. of (North) | 40.16 | 128.23 | 232 | 27700 |
| Op'yong-ni | city | Gyeongbuk | Korea, Republic of (South) | 36.05 | 128.38 | 111 | 72400 |