- Oak Forest
- Oak Grove
- Oakridge Estates
- Old Austin
- Old Alabam
- Old Buffalo
- Ozark Isle
- O'Donnell Bend
- Oak Island
- Ophir
- Owley
- Oak Grove
- Old River Island
- O'Kean
- Oak Grove Heights
- Oakgrove
- Oakhaven
- Oil Trough
- Oppelo
- Osceola
- Ozan
- Oak Grove
- Offutt Landing
- Old Town
- Old Weona
- Old Cove
- Olivers Chapel
- Opal
- Oak Grove
- Ouitaville