| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Onch'ol-li | city | Chungnam | Korea, Republic of (South) | 36.39 | 127.26 | 830 | 24986 |
| Onch'on | city | Chungnam | Korea, Republic of (South) | 36.39 | 127.26 | 830 | 24986 |
| Onch'on-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Onch'on-dong | city | Jeju | Korea, Republic of (South) | 33.33 | 126.77 | 301 | 10344 |
| Onch'on-dong | city | Gyeongbuk | Korea, Republic of (South) | 37.08 | 129.29 | 830 | 4727 |
| Onch'on-dong | city | Chungnam | Korea, Republic of (South) | 36.71 | 126.18 | 29 | 5156 |
| Onch'on-dong | city | Chungnam | Korea, Republic of (South) | 36.44 | 126.80 | 830 | 7785 |
| Onch'on-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.72 | 129.34 | 830 | 6705 |
| Onch'on-ni | city | Chungbuk | Korea, Republic of (South) | 36.85 | 127.98 | 830 | 7862 |
| Onch'on-ni | city | Chungnam | Korea, Republic of (South) | 36.78 | 127.02 | 39 | 75247 |
| Onch'on-ni | city | Jeju | Korea, Republic of (South) | 33.33 | 126.77 | 301 | 10344 |
| Oncheon | city | Chungnam | Korea, Republic of (South) | 36.39 | 127.26 | 830 | 24986 |
| Onchong | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Onch’ŏl-li | city | Chungnam | Korea, Republic of (South) | 36.39 | 127.26 | 830 | 24986 |
| Onch’ŏn | city | Chungnam | Korea, Republic of (South) | 36.39 | 127.26 | 830 | 24986 |
| Onch’ŏn-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Onch’ŏn-dong | city | Jeju | Korea, Republic of (South) | 33.33 | 126.77 | 301 | 10344 |
| Onch’ŏn-dong | city | Gyeongbuk | Korea, Republic of (South) | 37.08 | 129.29 | 830 | 4727 |
| Onch’ŏn-dong | city | Chungnam | Korea, Republic of (South) | 36.71 | 126.18 | 29 | 5156 |
| Onch’ŏn-dong | city | Chungnam | Korea, Republic of (South) | 36.44 | 126.80 | 830 | 7785 |
| Onch’ŏn-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.72 | 129.34 | 830 | 6705 |
| Onch’ŏn-ni | city | Chungbuk | Korea, Republic of (South) | 36.85 | 127.98 | 830 | 7862 |
| Onch’ŏn-ni | city | Chungnam | Korea, Republic of (South) | 36.78 | 127.02 | 39 | 75247 |
| Onch’ŏn-ni | city | Jeju | Korea, Republic of (South) | 33.33 | 126.77 | 301 | 10344 |