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- (Bullock County) Oakridge Farms
- (Bullock County) Oakridge Place
- (Bullock County) Oakridge Village Condominium
- (Conecuh County) Olympus View
- (DeKalb County) Olmstead
- (Conecuh County) Olivers
- (Bullock County) Oakridge Village
- (Fayette County) Old Mill Subdivision Phase 1-3
- (Colbert County) Old Limber Pine
- (Bullock County) Old Farm Estates
- (Conecuh County) Old Colony
- (Fayette County) Ogden Canyon Wildwood Estates
- (Conecuh County) Oakwood Park Condo
- (Conecuh County) Oakwood Estates Subdivision
- (Conecuh County) Oakwood Acres
- (Conecuh County) Oakview Estates Subdivision Numbers 2,3 and 4
- (Conecuh County) Oakview Estates Subdivision Number 1
- (Dale County) Ophir
- (Clay County) Oasis
- (Clarke County) Orderville
- (Clay County) Oak City
- (Coosa County) Oljato-Monument Valley
- (Boone County) Orangeville
- (Cullman County) Oakley
- (Conecuh County) Oquirrh
- (Fayette County) Ogden
- (DeKalb County) Orem