- Offutt
- Old Cumberland
- Oak View
- Old Chilhowee
- Old Glory
- Oxford Hills
- Oakwood
- Overbrook
- Oak Grove
- Oswego
- Oak Grove
- Oak Hill
- Okolona
- Okolona Estates
- Oaklawn
- Oak Grove
- Oak Grove
- Old Cedar Fork
- Oak Grove
- Opossum Island
- Oak Hill
- Oldtown
- Ottinger
- Ovoca
- Ojibwa Subdivision
- Oak Grove
- Oak Hill
- Oaklyn
- Obed River Estates
- Old Winesap