- Oak Chase
- Oak Creek Estates
- Oak Hill
- Oakhill
- Oakhill
- Oaks of Cumberland
- Oakwood Manor
- Ola
- Owens Meadows
- Oak Knolls
- Oak Park
- Oak Lake
- Old Town
- Omaha Springs
- Oak Ridge
- Oaklawn
- Old Condor
- Oakland
- Oakview Mobile Home Park
- Oak
- Old Clyattville
- Ousley
- Otisco
- Oak Point
- Oakengate
- Oakhurst
- Oakland
- Oldnor Island
- Oakland
- Odessadale