- Oakwood
- Oakwood
- Oakwood
- Oates Island
- Obed Junction
- Obed River Estates
- Obey City
- Obion
- Ocana
- Ocoee
- Odd Fellows Hall
- Offset
- Offutt
- Ogden
- Oglesby
- Okalona
- Okolona
- Okolona
- Okolona Estates
- Okra
- Old Antioch
- Old Bethpage
- Old Cedar Fork
- Old Chilhowee
- Old Cumberland
- Old Englewood
- Old Farm
- Old Fields Place
- Old Fremont
- Old Glory