- Outer Birch Island
- Outer Goose Island
- Outer Green Island
- Outer Green Island
- Outer Sand Island
- Outer Spectacle Island
- Outer Twin Island
- Oak Hill
- Oak Hill
- Oak Hill
- Oak Hill
- Oak Island
- Oak Island
- Oak Island
- Oak Island
- Oak Island
- Oak Island
- Oak Islands
- Oak Knoll Island
- Oak Ridge
- Oak Terrace
- Oakdale
- Oakes Corner
- Oakfield
- Oakland
- Oakwood
- Oar Island
- Obeds Rock
- Ocean Park
- Ocean Point