O
- (Sarah Baartman District Municipality) Oubosrand
- (Joe Gqabi District Municipality) Ou Bokkraal
- (Sarah Baartman District Municipality) Otterford
- (Joe Gqabi District Municipality) Oviston
- (Joe Gqabi District Municipality) Osnek
- (Chris Hani District Municipality) Osfontein
- (Chris Hani District Municipality) Osberg
- (Chris Hani District Municipality) Orel
- (Joe Gqabi District Municipality) Orangia
- (Joe Gqabi District Municipality) Orangesig
- (OR Tambo District Municipality) Orange Grove
- (OR Tambo District Municipality) Orange Grove
- (Joe Gqabi District Municipality) Oorlogspoort