- Obids
- Ocean
- Ocean City Beach
- Ocean Dunes
- Ocean Hills
- Ocean Isle Beach
- Ocean Pines
- Ocean Spray Mobile Home Estates
- Oceanway Mobile Home Park
- Oconaluftee Indian Village
- Ocracoke
- Ocracoke Island
- Odell
- Oden Mill
- Off Island
- Ogburn Crossroads
- Ogburn Station
- Ogburns Crossroads
- Ogden
- Ogreeta
- Oine
- Okeewemee
- Okisko
- Ola
- Old Bethlehem
- Old Chapel Crossroads
- Old Cumbee Place
- Old Dock
- Old Farm
- Old Farm