O
- (Xhariep District Municipality) Oorlogspoort
- (Lejweleputswa District Municipality) Odendaalsrus
- (Mangaung Metropolitan Municipality) Olga
- (Xhariep District Municipality) Olievenhout Bank
- (Xhariep District Municipality) Olievenkop
- (Mangaung Metropolitan Municipality) Olievenkoppies
- (Xhariep District Municipality) Olivewoodpark
- (Xhariep District Municipality) Olyvenfontein
- (Xhariep District Municipality) Olyvenkoppiespan
- (Xhariep District Municipality) Ommerin
- (Xhariep District Municipality) Ongegund
- (Xhariep District Municipality) Ongeluksfontein
- (Xhariep District Municipality) Ongelukskop
- (Mangaung Metropolitan Municipality) Onse Rust
- (Thabo Mofutsanyana District Municipality) Onverdiend
- (Xhariep District Municipality) Overskat
- (Xhariep District Municipality) Oorskot
- (Xhariep District Municipality) Oosdeel
- (Xhariep District Municipality) Oostenryk
- (Thabo Mofutsanyana District Municipality) Oosterbeek
- (Xhariep District Municipality) Oranje
- (Xhariep District Municipality) Oranjekrag
- (Fezile Dabi District Municipality) Oranjeville
- (Mangaung Metropolitan Municipality) Oranjezicht
- (Xhariep District Municipality) Oudersgift
- (Xhariep District Municipality) Oudersorg
- (Xhariep District Municipality) Oudestrypoort
- (Fezile Dabi District Municipality) Oufontein
- (Xhariep District Municipality) Overschot