| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| 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 |
| Onyang | city | Chungnam | Korea, Republic of (South) | 36.78 | 127.00 | 75 | 74171 |
| Onyang-dong | city | Incheon | Korea, Republic of (South) | 37.48 | 126.55 | 72 | 20829 |
| Onyang-gol | city | Gyeongnam | Korea, Republic of (South) | 35.63 | 128.19 | 173 | 7199 |
| Onyang-ni | city | Gyeongbuk | Korea, Republic of (South) | 37.02 | 129.40 | 177 | 4667 |
| Onyangmŏ-ri | city | Chungnam | Korea, Republic of (South) | 36.70 | 126.80 | 36 | 40455 |
| Onyangni | city | Gyeongbuk | Korea, Republic of (South) | 37.02 | 129.40 | 177 | 4667 |
| Onyangonch'oni-dong | city | Chungnam | Korea, Republic of (South) | 36.78 | 127.00 | 72 | 73511 |
| Onyangonch'onil-tong | city | Chungnam | Korea, Republic of (South) | 36.79 | 127.00 | 49 | 74171 |
| Onyangonch’ŏni-dong | city | Chungnam | Korea, Republic of (South) | 36.78 | 127.00 | 72 | 73511 |
| Onyangonch’ŏnil-tong | city | Chungnam | Korea, Republic of (South) | 36.79 | 127.00 | 49 | 74171 |
| Onyangt'o | city | Chungbuk | Korea, Republic of (South) | 37.05 | 127.47 | 830 | 9907 |
| Onyangteo | city | Chungbuk | Korea, Republic of (South) | 37.05 | 127.47 | 830 | 9907 |
| Onyangt’ŏ | city | Chungbuk | Korea, Republic of (South) | 37.05 | 127.47 | 830 | 9907 |
| Onyo | city | Chungnam | Korea, Republic of (South) | 36.78 | 127.00 | 75 | 74171 |
| Onyo-ri | city | Gyeongbuk | Korea, Republic of (South) | 37.02 | 129.40 | 177 | 4667 |
| Onyŏul | city | Gangwon | Korea, Republic of (South) | 37.22 | 127.81 | 830 | 16533 |