- Old Beach
- Old Tree Island
- Old Trower
- Oak Hill
- Oak Hill Mobile Home Park
- Oak Terrace
- Old Dominion
- Orchard Acres
- Overton
- Owensville
- Oakwood Forest
- Otterburn
- Old Stage Run
- Oronoco
- Oak Hill
- Oakville
- Oakwood
- Overlee Knolls
- Oakview
- Old Mill
- Otter Hill
- Otterville
- Oldfields
- Owens
- Oakcrest
- Oak Grove
- Oaklette
- Offutt Village
- Old Orchard
- Oriana