- Ossipee
- Old Sneedsboro
- Obids
- Ore Knob
- Orion
- Othello
- Oval
- Oden Mill
- Old Ford
- Oak Grove
- Oak Island
- Old Cumbee Place
- Old Town
- Oak Forest
- Oak Park
- Oteen
- Owltown
- Oak Hill
- Oak Cliffs
- Oak Hill
- Oakmont Estates
- Old Farm
- Olivette
- Old Trap
- Oak Hammock
- Ocean
- Ocean Spray Mobile Home Estates
- Outer Grass Lump
- Osmond
- Olivers Crossroads