Ontario
Îles commençant par u
Canada
- Umber Island
- Umbrella Island
- Umbrella Island
- Umbrella Island
- Umwah Island
- Unburnt Island
- Uncle Henry Island
- Undercliff Island
- Underhill Island
- Underwood Island
- Unger Island
- Union Jack Island
- Upper Duck Island
- Upper Foley Island
- Upper Sister Island
- Upsilanti Island
- Urania Island