| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Onbyol | city | Gangwon | Korea, Republic of (South) | 37.70 | 128.95 | 830 | 27976 |
| Ong-gol | city | Gangwon | Korea, Republic of (South) | 37.21 | 127.87 | 994 | 16522 |
| Ongdol | city | Gangwon | Korea, Republic of (South) | 37.79 | 128.03 | 1669 | 2533 |
| Onggijeommal | city | Gangwon | Korea, Republic of (South) | 37.96 | 127.77 | 390 | 53715 |
| Onggijŏm | city | Gangwon | Korea, Republic of (South) | 37.47 | 129.13 | 118 | 34477 |
| Onggijŏm-mal | city | Gangwon | Korea, Republic of (South) | 37.96 | 127.77 | 390 | 53715 |
| Onggijŏmmal | city | Gangwon | Korea, Republic of (South) | 38.11 | 127.69 | 364 | 2533 |
| Onggijŏmmal | city | Gangwon | Korea, Republic of (South) | 38.05 | 127.65 | 830 | 3132 |
| Onggijŏn-mal | city | Gangwon | Korea, Republic of (South) | 37.35 | 128.38 | 1007 | 997 |
| Onggol | city | Gangwon | Korea, Republic of (South) | 38.19 | 128.56 | 347 | 22967 |
| Onggujom | city | Gangwon | Korea, Republic of (South) | 37.48 | 129.08 | 236 | 44488 |
| Ongjang-gol | city | Gangwon | Korea, Republic of (South) | 37.50 | 128.24 | 1843 | 228 |
| Ongjang-gol | city | Gangwon | Korea, Republic of (South) | 37.64 | 128.57 | 1876 | 1058 |
| Ongjeongni | city | Gangwon | Korea, Republic of (South) | 37.22 | 128.35 | 938 | 15124 |
| Ongjong-ni | city | Gangwon | Korea, Republic of (South) | 37.22 | 128.35 | 938 | 15124 |
| Ongjŏm-dong | city | Gangwon | Korea, Republic of (South) | 37.16 | 129.24 | 830 | 0 |
| Ongnudong | city | Gangwon | Korea, Republic of (South) | 37.70 | 128.20 | 1669 | 2533 |
| Onjeongni | city | Gangwon | Korea, Republic of (South) | 38.19 | 128.59 | 147 | 15532 |
| Onjong-ni | city | Gangwon | Korea, Republic of (South) | 38.19 | 128.59 | 147 | 15532 |
| Onnamuyeoul | city | Gangwon | Korea, Republic of (South) | 37.76 | 127.98 | 830 | 2549 |
| Onnamuyoul | city | Gangwon | Korea, Republic of (South) | 37.76 | 127.98 | 830 | 2549 |
| Onyŏul | city | Gangwon | Korea, Republic of (South) | 37.22 | 127.81 | 830 | 16533 |