- Oak Villa Mobile Home Park
- Oakbrook
- Oakcreek Estates Mobile Home Park
- Oakhill
- Oakland
- Oakland
- Oakland
- Oakland, Bienville
- Oaklawn
- Oaklawn
- Oakleaf Estates
- Oakley
- Oakley
- Oakley
- Oakley Landing
- Oaknolia
- Oaks
- Oakshire Manor
- Oakville
- Oakwood Landing
- Oasis
- Oberlin
- Odenburg
- Odra
- Oil City
- OK Landing
- Okaloosa
- Oklahoma
- Old Athens
- Old Castor