Nunavut
Îles commençant par o
Canada
- Observation Island
- October Island
- Ogden Island
- Okalik Island
- Okivik Island
- Okolli Island
- O'Leary Island
- Olsen Island
- Onitkok Island
- Ooglukjuak Island
- Opingivik Island
- Opingivik Island
- Opposite Island
- O'Reilly Island
- Orion Islet
- Ormonde Island
- Orne Island
- Otrick Island
- Outer Island
- Outer Island
- Owlitteeweek Island