| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Uam | city | Incheon | Korea, Republic of (South) | 37.43 | 126.65 | 62 | 810239 |
| Uldo-ri | city | Incheon | Korea, Republic of (South) | 37.03 | 125.99 | 0 | 6999 |
| Ullegi | city | Incheon | Korea, Republic of (South) | 37.71 | 126.47 | 55 | 11770 |
| Ulnegi | city | Incheon | Korea, Republic of (South) | 37.71 | 126.47 | 55 | 11770 |
| Ulto-ri | city | Incheon | Korea, Republic of (South) | 37.03 | 125.99 | 0 | 6999 |
| Ulto-ri | city | Incheon | Korea, Republic of (South) | 37.02 | 126.00 | 68 | 6774 |
| Um-ch'on | city | Incheon | Korea, Republic of (South) | 37.81 | 126.44 | 232 | 8567 |
| Umullek-kol | city | Incheon | Korea, Republic of (South) | 37.81 | 126.26 | 32 | 2725 |
| Umulletgol | city | Incheon | Korea, Republic of (South) | 37.81 | 126.26 | 32 | 2725 |
| Umullnetgol | city | Incheon | Korea, Republic of (South) | 37.81 | 126.26 | 32 | 2725 |
| Un'gok | city | Incheon | Korea, Republic of (South) | 37.65 | 126.66 | 65 | 100275 |
| Un-mal | city | Incheon | Korea, Republic of (South) | 37.62 | 126.45 | 337 | 5597 |
| Unbuk-dong | city | Incheon | Korea, Republic of (South) | 37.52 | 126.51 | 134 | 8418 |
| Unbukdong | city | Incheon | Korea, Republic of (South) | 37.52 | 126.51 | 134 | 8418 |
| Unggok | city | Incheon | Korea, Republic of (South) | 37.81 | 126.41 | 311 | 6065 |
| Unhaeng-mal | city | Incheon | Korea, Republic of (South) | 37.67 | 126.18 | 0 | 164 |
| Unhaeng-ni | city | Incheon | Korea, Republic of (South) | 37.67 | 126.18 | 0 | 164 |
| Unmaŭl | city | Incheon | Korea, Republic of (South) | 37.64 | 126.67 | 65 | 145066 |
| Unnam-dong | city | Incheon | Korea, Republic of (South) | 37.50 | 126.52 | 101 | 8532 |
| Unnamdong | city | Incheon | Korea, Republic of (South) | 37.50 | 126.52 | 101 | 8532 |
| Unseo-dong | city | Incheon | Korea, Republic of (South) | 37.50 | 126.49 | 98 | 9506 |
| Unseodong | city | Incheon | Korea, Republic of (South) | 37.50 | 126.49 | 98 | 9506 |
| Unsŏ-dong | city | Incheon | Korea, Republic of (South) | 37.50 | 126.49 | 98 | 9506 |
| Unsŏ-ri | city | Incheon | Korea, Republic of (South) | 37.50 | 126.49 | 98 | 9506 |
| Unyang-ni | city | Incheon | Korea, Republic of (South) | 37.66 | 126.68 | 26 | 124835 |
| Un’gok | city | Incheon | Korea, Republic of (South) | 37.65 | 126.66 | 65 | 100275 |
| Up'o-ri | city | Incheon | Korea, Republic of (South) | 37.24 | 126.11 | 291 | 1843 |
| Up’o-ri | city | Incheon | Korea, Republic of (South) | 37.24 | 126.11 | 291 | 1843 |
| Uroe | city | Incheon | Korea, Republic of (South) | 37.79 | 126.48 | 0 | 12022 |
| Urwang-ni | city | Incheon | Korea, Republic of (South) | 37.45 | 126.38 | 72 | 1423 |
| Ut-mal | city | Incheon | Korea, Republic of (South) | 37.62 | 126.45 | 337 | 5597 |
| Utsuto-ri | city | Incheon | Korea, Republic of (South) | 37.03 | 125.99 | 0 | 6999 |