Manitoba
Îles commençant par o
Canada
- O'Brien Island
- Oddur Island
- Oganse Island
- Ohookisew Island
- Okay Island
- Old Buildings Island
- Oleson Island
- Oliver Island
- Olson Island
- Omaseenawapiskinapik Island
- One Island
- O'Neill Island
- Onootunaykway Island
- Orr Island
- Osawastim Island
- Oskatukow Island
- Otter Island
- Owens Island
- Oxford Island