| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Osa | city | Chungnam | Korea, Republic of (South) | 36.95 | 126.75 | 32 | 11004 |
| Osa-ri | city | Chungnam | Korea, Republic of (South) | 36.95 | 126.75 | 32 | 11004 |
| Osa-ri | city | Chungnam | Korea, Republic of (South) | 36.55 | 126.47 | 26 | 7323 |
| Osa-ri | city | Chungnam | Korea, Republic of (South) | 36.83 | 126.43 | 167 | 30136 |
| Osaengi | city | Chungnam | Korea, Republic of (South) | 36.68 | 126.67 | 45 | 12475 |
| Osal-li | city | Chungnam | Korea, Republic of (South) | 36.73 | 126.80 | 36 | 37791 |
| Osal-li | city | Chungnam | Korea, Republic of (South) | 36.39 | 126.96 | 236 | 7722 |
| Osal-li | city | Chungnam | Korea, Republic of (South) | 36.80 | 126.92 | 32 | 48414 |
| Osal-li | city | Chungnam | Korea, Republic of (South) | 36.13 | 127.28 | 305 | 8516 |
| Osalmi | city | Chungnam | Korea, Republic of (South) | 36.27 | 126.95 | 193 | 34348 |
| Osalmoe | city | Chungnam | Korea, Republic of (South) | 36.39 | 126.96 | 236 | 7722 |
| Osan | city | Chungnam | Korea, Republic of (South) | 36.28 | 126.95 | 193 | 31423 |
| Osan | city | Chungnam | Korea, Republic of (South) | 36.49 | 126.66 | 173 | 16241 |
| Osan-ni | city | Chungnam | Korea, Republic of (South) | 36.85 | 126.73 | 3 | 15944 |
| Osan-ni | city | Chungnam | Korea, Republic of (South) | 36.73 | 126.80 | 36 | 37791 |
| Osan-ni | city | Chungnam | Korea, Republic of (South) | 36.39 | 126.96 | 236 | 7722 |
| Osanmal | city | Chungnam | Korea, Republic of (South) | 36.76 | 126.95 | 124 | 52248 |
| Osil | city | Chungnam | Korea, Republic of (South) | 36.41 | 127.11 | 301 | 31072 |
| Osong-ni | city | Chungnam | Korea, Republic of (South) | 36.80 | 126.35 | 3 | 18104 |
| Osong-ni | city | Chungnam | Korea, Republic of (South) | 36.10 | 126.70 | 127 | 4948 |
| Osongjŏng | city | Chungnam | Korea, Republic of (South) | 36.82 | 127.27 | 360 | 56909 |
| Osu-ri | city | Chungnam | Korea, Republic of (South) | 36.30 | 126.89 | 19 | 29372 |
| Osumul | city | Chungnam | Korea, Republic of (South) | 36.12 | 127.50 | 830 | 18454 |
| Osŏndae | city | Chungnam | Korea, Republic of (South) | 36.49 | 126.99 | 830 | 7301 |
| Osŏng-ni | city | Chungnam | Korea, Republic of (South) | 36.49 | 126.66 | 830 | 16128 |