- Oakleaf
- Oakridge Country Club Estates
- Oakridge Farms
- Oakridge Place
- Oakridge Village
- Oakridge Village Condominium
- Old Farm Estates
- Orchard Corners Condominium
- Osiris
- Old Irontown
- Old Limber Pine
- Oak at Wasatch Place
- Oak Creek Hills
- Oakcliff Park Two
- Oakcrest
- Oakdale
- Oakeson Villa
- Oakview Estates Subdivision Number 1
- Oakview Estates Subdivision Numbers 2,3 and 4
- Oakwood Acres
- Oakwood Estates Subdivision
- Oakwood Park Condo
- Old Colony
- Olivers
- Olympus Shadows Estates
- Olympus View
- Oquirlane
- Oquirrh Hills Office Building Condo
- Oquirrh Hills Subdivision
- Oquirrh Hills Subdivision 2-4