- Orchard Grove
- Orchard Heights
- Orchard Prairie
- Orchard Trailer Park
- Orchards
- Orchards North
- Orchards South
- Orient
- Orillia
- Orin
- Orondo
- Oroville
- Orting
- Osborn Corner
- Osborne
- Osborne Corner
- Osceola
- Oskams Corner
- Oso
- Ostrander
- Othello
- Otis Orchards
- Otis Orchards-East Farms
- Outlook
- Overlake
- Ovington
- Oxley
- Oyehut
- Oyehut-Hogans Corner
- Oysterville