| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Jaenggolmaeul | city | Seoul | Korea, Republic of (South) | 37.48 | 127.10 | 104 | 1552530 |
| Jagok-dong | city | Seoul | Korea, Republic of (South) | 37.47 | 127.09 | 147 | 1449870 |
| Jagokdong | city | Seoul | Korea, Republic of (South) | 37.47 | 127.09 | 147 | 1449870 |
| Jang-wi-dong | city | Seoul | Korea, Republic of (South) | 37.62 | 127.05 | 72 | 1866895 |
| Jangjeon | city | Seoul | Korea, Republic of (South) | 33.45 | 126.39 | 830 | 17468 |
| Jangwidong | city | Seoul | Korea, Republic of (South) | 37.62 | 127.05 | 72 | 1866895 |
| Jayanggol | city | Seoul | Korea, Republic of (South) | 37.48 | 127.10 | 91 | 1552530 |
| Jeolmul | city | Seoul | Korea, Republic of (South) | 33.49 | 126.43 | 59 | 41553 |
| Jeong-dong | city | Seoul | Korea, Republic of (South) | 37.57 | 126.97 | 147 | 1403869 |
| Jeongdong | city | Seoul | Korea, Republic of (South) | 37.57 | 126.97 | 147 | 1403869 |
| Jeongneung-dong | city | Seoul | Korea, Republic of (South) | 37.62 | 126.99 | 830 | 1124637 |
| Jeongneungdong | city | Seoul | Korea, Republic of (South) | 37.62 | 126.99 | 830 | 1124637 |
| Jiyangdong | city | Seoul | Korea, Republic of (South) | 37.53 | 127.08 | 55 | 1775306 |
| Jukbawi | city | Seoul | Korea, Republic of (South) | 37.46 | 127.03 | 347 | 961803 |
| Jungeom | city | Seoul | Korea, Republic of (South) | 33.48 | 126.38 | 144 | 10532 |
| Junggok-dong | city | Seoul | Korea, Republic of (South) | 37.56 | 127.09 | 200 | 1853809 |
| Junggokdong | city | Seoul | Korea, Republic of (South) | 37.56 | 127.09 | 200 | 1853809 |
| Junggol | city | Seoul | Korea, Republic of (South) | 37.65 | 126.95 | 285 | 513409 |
| Junggye-dong | city | Seoul | Korea, Republic of (South) | 37.66 | 127.08 | 830 | 1124288 |
| Junggyedong | city | Seoul | Korea, Republic of (South) | 37.66 | 127.08 | 830 | 1124288 |
| Junghwa-dong | city | Seoul | Korea, Republic of (South) | 37.60 | 127.07 | 49 | 1952873 |
| Junghwadong | city | Seoul | Korea, Republic of (South) | 37.60 | 127.07 | 49 | 1952873 |
| Jungsanmotungi | city | Seoul | Korea, Republic of (South) | 37.65 | 126.94 | 285 | 592093 |
| Jurodong | city | Seoul | Korea, Republic of (South) | 33.48 | 126.40 | 114 | 23878 |