O
- (Dallas County) Ouray
- (Fayette County) Orchard Park Subdivision Number 3-7
- (Conecuh County) Oxford Manor Condominium
- (Conecuh County) Oquirrh (historical)
- (Conecuh County) Oquirlane
- (DeKalb County) Orem Station
- (Conecuh County) Oquirrh Hills Office Building Condo
- (Conecuh County) Oquirrh Hills Subdivision
- (Conecuh County) Oquirrh Hills Subdivision 2-4
- (Conecuh County) Oquirrh Hills Subdivision 5, 6, 8 and 9
- (Escambia County) Oak Creek Residential Area
- (Conecuh County) Oquirrh Shadows
- (Fayette County) Oquirrh View
- (Bullock County) Orchard Corners Condominium
- (Conecuh County) Orchard Country Woods Condo
- (Fayette County) Orchard Park Estates Subdivision Number One and Two
- (Conecuh County) Olympus Shadows Estates
- (Covington County) Oak Creek
- (Chilton County) Old Irontown
- (Coosa County) Old La Sal
- (Coosa County) Oljato
- (Chambers County) Osiris
- (Conecuh County) Oakcrest
- (Conecuh County) Oak Creek Hills
- (Conecuh County) Oak at Wasatch Place
- (Conecuh County) Oakcliff Park Two
- (Conecuh County) Oakdale
- (Conecuh County) Oakeson Villa
- (Bullock County) Oakleaf
- (Bullock County) Oakridge Country Club Estates