États-Unis
Îles commençant par u
- Ubi Island
- Uchixsax
- Ugaiushak Island
- Ugak Island
- Ugak Island
- Ugalux
- Ugamak Island
- Uganik Island
- Ugidak Island
- Ukolnoi Island
- Ukolnoi Rocks
- Ulak Island
- Ulak Island
- Uliaga Island
- Ulinoi Island
- Ulloa Island
- Ultimo Island
- Umak Island
- Umbrella Island
- Umbrella Island
- Umbrella Key
- Umga Island
- Umla Island
- Umnak Island
- Unalaska Island
- Unalga Island
- Unalga Island
- Unavikshak Island
- Unbanar Island
- Uncas Island
- Uncatena Island
- Uncle Zeke Island
- Unga Island
- Ungluchin
- Unglulagan
- Ungluugamax
- Unglux
- Unguchiing Achidan Tanangis
- Unguchiing Hachan Tangingis
- Unicorn Island
- Unimak Island
- Union Island
- Union Island
- Unishka Island
- Unlucky Island
- Upper Arsnicker Keys
- Upper Bear Island
- Upper Bernard Island
- Upper Birch Island
- Upper Blue River Island