U
| Ua Huka (PF) | Ulaangom (MN) | Uranium City (CA) |
| Ua Pou (PF) | Ulan (CN) | Uray (RU) |
| UÅŸak (TR) | Ulan Batur (MN) | Urganch (UZ) |
| Ube (JP) | Uliastay (MN) | Urmiye (IR) |
| Uberaba (BR) | Ulsan (KR) | Uruapan (MX) |
| Uberlandia (BR) | Ul'yanovsk (RU) | Urumçi (CN) |
| Ubon Ratchathani (TH) | Umea (SE) | Ushuaia (AR) |
| Udaipur (IN) | Umiujaq (CA) | Usinsk (RU) |
| Udon Thani (TH) | Umtata (ZA) | Utila (HN) |
| Ufa (RU) | Unalakleet (US) | Uummannaq (GL) |
| Ujungpandang (ID) | Upernavik (GL) | Uzhhorod (UA) |
| Ukhta (RU) | Upington (ZA) |