- Old Town
- Osborn
- Oswald Place
- Otranto
- Oyster Point
- Orrs
- Oakhurst Island
- Otter Islands
- Oats
- Oak Grove
- Oakland Crossroads
- Oliver Crossroads
- Oakbrook
- Oakdale Estates
- Oakmont
- Old Fort Estates
- Old Saint George
- Orchard Hill
- Old Buckhead
- Oak Forest
- Oak Grove
- Oakdale
- Old Court
- Orum
- Oak Grove
- Oak Hill
- Oaks Island
- Oatland
- Oceda
- Olin