- Oak Hill
- Oakland
- Onks
- Old Hall
- Ore Springs
- O'Conner
- Old Fields Place
- Old Zion
- Oak Hampton
- Owl Creek
- Old Antioch
- Oak Grove
- Oakland
- Osborn
- Oak Grove
- Oak Grove Heights
- Oak Park
- Oakland
- Oxmore Hills
- Owl City
- Owl Hoot
- Oakland
- Oak Grove
- Oak Hill Subdivision
- Olive Branch
- Opossum
- Orysa
- Oak Hill
- Ovilla
- Oak Grove