- O'Leary Islets
- O'Neil Islet
- Oak Bay
- Oak Hills
- Oakridge
- Oblong Island
- Observation Islet
- Obstruction Island
- Ocayu Island
- Ocean Falls
- Ocean Park
- Octopus Islands
- Odlum Island
- Ogilvie Island
- Okanagan Centre
- Okanagan Mission
- Okis Islands
- Oland Islet
- Old Fort Nelson
- Old Massett
- Old Remo
- Olden Island
- Oliver
- Oliver's Landing
- Olsen Island
- Onetree Islet
- Onion Island
- Oona River
- Orwig Islets
- Osborne Islands