| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| U | city | State of Pohnpei | Federated States of Micronesia | 6.9502778 | 158.2711111 | 3 | 14176 |
| U Mura | city | State of Pohnpei | Federated States of Micronesia | 6.9502778 | 158.2711111 | 3 | 14176 |
| Uanajan | city | State of Yap | Federated States of Micronesia | 9.5472222 | 138.1969444 | 0 | 5919 |
| Ucloj | city | State of Yap | Federated States of Micronesia | 9.5830556 | 138.1797222 | 0 | 5919 |
| Uelei | city | State of Yap | Federated States of Micronesia | 9.5830556 | 138.1797222 | 0 | 5919 |
| Ueloi | city | State of Yap | Federated States of Micronesia | 9.5830556 | 138.1797222 | 0 | 5919 |
| Ueloy | city | State of Yap | Federated States of Micronesia | 9.5830556 | 138.1797222 | 0 | 5919 |
| Uenfra | city | State of Yap | Federated States of Micronesia | 9.6183333 | 138.1652778 | 0 | 5838 |
| Uenfura | city | State of Yap | Federated States of Micronesia | 9.6183333 | 138.1652778 | 0 | 5838 |
| Ueroi | city | State of Yap | Federated States of Micronesia | 9.5830556 | 138.1797222 | 0 | 5919 |
| Ueroru | city | State of Chuuk | Federated States of Micronesia | 7.35 | 151.7833333 | 0 | 1494 |
| Ugem | city | State of Yap | Federated States of Micronesia | 9.4508333 | 138.0691667 | 0 | 2570 |
| Ulu | city | State of Yap | Federated States of Micronesia | 9.5733333 | 138.1358333 | 0 | 9812 |
| Umin | city | State of Yap | Federated States of Micronesia | 9.6 | 138.15 | 131 | 5838 |
| Umin | city | State of Yap | Federated States of Micronesia | 9.6002778 | 138.1652778 | 82 | 5838 |
| Umun | city | State of Yap | Federated States of Micronesia | 9.5566667 | 138.1919444 | 0 | 5919 |
| Umung | city | State of Yap | Federated States of Micronesia | 9.5513889 | 138.1847222 | 3 | 5919 |
| Umung | city | State of Yap | Federated States of Micronesia | 9.5566667 | 138.1919444 | 0 | 5919 |
| Umungu | city | State of Yap | Federated States of Micronesia | 9.5566667 | 138.1919444 | 0 | 5919 |
| Unefaraa | city | State of Yap | Federated States of Micronesia | 9.6216667 | 138.1661111 | 0 | 5838 |
| Unifei | city | State of Chuuk | Federated States of Micronesia | 7.3333333 | 151.65 | 0 | 2716 |
| Unikapi | city | State of Chuuk | Federated States of Micronesia | 7.3333333 | 151.5566667 | 0 | 2896 |
| Unikappi | city | State of Chuuk | Federated States of Micronesia | 7.3333333 | 151.5566667 | 0 | 2896 |
| Unun en Unikopi | city | State of Chuuk | Federated States of Micronesia | 7.3333333 | 151.5566667 | 0 | 2896 |
| Unun en Unum | city | State of Chuuk | Federated States of Micronesia | 7.3641667 | 151.8152778 | 3 | 2646 |
| Ununo | city | State of Chuuk | Federated States of Micronesia | 7.3641667 | 151.8152778 | 3 | 2646 |
| Uonean | city | State of Yap | Federated States of Micronesia | 9.5472222 | 138.1969444 | 0 | 5919 |
| Uoruuoru | city | State of Yap | Federated States of Micronesia | 9.5091667 | 138.1283333 | 0 | 9333 |
| Uoten | city | State of Pohnpei | Federated States of Micronesia | 6.9666667 | 158.1936111 | 3 | 7739 |
| Upen | city | State of Chuuk | Federated States of Micronesia | 7.3327778 | 151.8463889 | 0 | 2657 |
| Upwein | city | State of Chuuk | Federated States of Micronesia | 7.3336111 | 151.8366667 | 3 | 3575 |
| Utwa | city | State of Kosrae | Federated States of Micronesia | 5.2716667 | 162.9622222 | 0 | 9922 |
| Utwa Ma | city | State of Kosrae | Federated States of Micronesia | 5.2716667 | 162.9622222 | 0 | 9922 |
| Uvilee | city | State of Yap | Federated States of Micronesia | 9.5825 | 138.1555556 | 6 | 9812 |