| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| On'gum-dong | city | Jeonnam | Korea, Republic of (South) | 34.78 | 126.37 | 0 | 45896 |
| On-gol | city | Jeonnam | Korea, Republic of (South) | 34.73 | 127.21 | 0 | 3649 |
| Ondang-ni | city | Jeonnam | Korea, Republic of (South) | 35.28 | 127.44 | 393 | 8114 |
| Ondok | city | Jeonnam | Korea, Republic of (South) | 34.73 | 126.28 | 0 | 3511 |
| Ondong | city | Jeonnam | Korea, Republic of (South) | 34.77 | 127.33 | 72 | 10861 |
| Ondong | city | Jeonnam | Korea, Republic of (South) | 34.84 | 127.28 | 127 | 20061 |
| Ondong-ni | city | Jeonnam | Korea, Republic of (South) | 34.77 | 127.33 | 72 | 10861 |
| Ondong-ni | city | Jeonnam | Korea, Republic of (South) | 34.73 | 126.28 | 0 | 3511 |
| Ong-ni | city | Jeonnam | Korea, Republic of (South) | 34.90 | 127.07 | 987 | 7890 |
| Ong-ni | city | Jeonnam | Korea, Republic of (South) | 35.16 | 127.08 | 830 | 8859 |
| Ongam | city | Jeonnam | Korea, Republic of (South) | 34.53 | 126.55 | 9 | 13356 |
| Ongam | city | Jeonnam | Korea, Republic of (South) | 34.44 | 126.88 | 0 | 5252 |
| Ongam | city | Jeonnam | Korea, Republic of (South) | 34.79 | 127.39 | 3 | 11163 |
| Ongam-ni | city | Jeonnam | Korea, Republic of (South) | 34.79 | 127.38 | 0 | 13334 |
| Ongam-ni | city | Jeonnam | Korea, Republic of (South) | 34.53 | 126.55 | 9 | 13356 |
| Ongam-ni | city | Jeonnam | Korea, Republic of (South) | 34.44 | 126.88 | 0 | 5252 |
| Ongjom-ni | city | Jeonnam | Korea, Republic of (South) | 34.70 | 126.57 | 9 | 11970 |
| Ongjom-ni | city | Jeonnam | Korea, Republic of (South) | 34.82 | 126.68 | 9 | 13459 |
| Ongma-ri | city | Jeonnam | Korea, Republic of (South) | 34.80 | 127.04 | 830 | 7544 |
| Ongnim | city | Jeonnam | Korea, Republic of (South) | 35.01 | 127.02 | 360 | 13229 |
| Ongnyong | city | Jeonnam | Korea, Republic of (South) | 34.44 | 127.13 | 3 | 4764 |
| Ongnyong-ni | city | Jeonnam | Korea, Republic of (South) | 34.44 | 127.13 | 3 | 4764 |
| Ongnyŏ-bong | city | Jeonnam | Korea, Republic of (South) | 34.51 | 126.93 | 6 | 8183 |
| Ongnyŏn | city | Jeonnam | Korea, Republic of (South) | 34.82 | 127.01 | 830 | 8390 |
| Onhang-ni | city | Jeonnam | Korea, Republic of (South) | 34.55 | 126.07 | 160 | 4098 |
| Onin | city | Jeonnam | Korea, Republic of (South) | 34.55 | 126.55 | 49 | 16619 |
| Onsu | city | Jeonnam | Korea, Republic of (South) | 34.65 | 126.30 | 16 | 6371 |
| Onsu-ri | city | Jeonnam | Korea, Republic of (South) | 34.65 | 126.30 | 16 | 6371 |
| Onsu-ri | city | Jeonnam | Korea, Republic of (South) | 35.14 | 127.24 | 180 | 8420 |
| Onsudong | city | Jeonnam | Korea, Republic of (South) | 34.74 | 127.09 | 830 | 5948 |
| Onsudong | city | Jeonnam | Korea, Republic of (South) | 34.97 | 126.68 | 49 | 27428 |
| Onya | city | Jeonnam | Korea, Republic of (South) | 34.87 | 127.44 | 39 | 47116 |
| Onya | city | Jeonnam | Korea, Republic of (South) | 34.89 | 127.32 | 62 | 35548 |
| On’gŭm-dong | city | Jeonnam | Korea, Republic of (South) | 34.78 | 126.37 | 0 | 45896 |