U
| Ua Huka (PF) | Ulan (CN) | Uray (RU) |
| Ua Pou (PF) | Ulan-Ude (RU) | Urgench (UZ) |
| Ube (JP) | Uliastay (MN) | Urmia (IR) |
| Uberaba (BR) | Uliga (MH) | Uruapan (MX) |
| Uberlandia (BR) | Ulsan (KR) | Uşak (TR) |
| Ubon Ratchathani (TH) | Ul'yanovsk (RU) | Ushuaia (AR) |
| Udaipur (IN) | Umeå (SE) | Usinsk (RU) |
| Udon Thani (TH) | Umiujaq (CA) | Ustupo (PA) |
| Ufa (RU) | Umtata (ZA) | Utila (HN) |
| Ujungpandang (ID) | Unalakleet (US) | Uummannaq (GL) |
| Ukhta (RU) | Upernavik (GL) | Uzhhorod (UA) |
| Ulaanbaatar (MN) | Upington (ZA) | |
| Ulaangom (MN) | Uranium City (CA) |