O
- (Amathole District Municipality) Old Idutywa
- (Sarah Baartman District Municipality) Onverwagslaagte
- (Joe Gqabi District Municipality) Onverwag
- (Chris Hani District Municipality) Onverwacht (2)
- (Sarah Baartman District Municipality) Onder-Smoordrif
- (Joe Gqabi District Municipality) Omdraai
- (Joe Gqabi District Municipality) Oliviersrust
- (Nelson Mandela Bay Metropolitan Municipality) Olifants Kop
- (Joe Gqabi District Municipality) Oliewenkloof
- (Joe Gqabi District Municipality) Oliewenberg
- (OR Tambo District Municipality) Old Morley
- (Joe Gqabi District Municipality) Ooriogspos
- (Buffalo City Metropolitan Municipality) Old Green River
- (OR Tambo District Municipality) Old Bunting
- (Sarah Baartman District Municipality) Oyster Bay
- (Alfred Nzo District Municipality) O’Connors Camp
- (Amathole District Municipality) Ocean View
- (Joe Gqabi District Municipality) Oatlands
- (Joe Gqabi District Municipality) Oakleigh
- (Chris Hani District Municipality) Oaklands
- (Joe Gqabi District Municipality) Oaklands
- (OR Tambo District Municipality) Oakancu
- (Alfred Nzo District Municipality) Otterburn
- (Amathole District Municipality) Outubeni
- (Joe Gqabi District Municipality) Outspan
- (Joe Gqabi District Municipality) Ou Tol
- (Sarah Baartman District Municipality) Ouplass
- (Chris Hani District Municipality) Oudelkraal
- (Joe Gqabi District Municipality) Oudedag
- (Sarah Baartman District Municipality) Oubosstrand