| Place | State | Latitude | Longitude | Elevation (meters) | Elevation (feet) |
|---|
| Orkney | Province of North-West | -26.9833333 | 26.6666667 | 1304 | 4278 |
| Oshoek | Mpumalanga | -25.2 | 30.2 | 1824 | 5984 |
| Osizweni | Province of KwaZulu-Natal | -27.7833333 | 30.15 | 1210 | 3970 |
| Oslo Beach | Province of KwaZulu-Natal | -30.7666667 | 30.4333333 | 28 | 92 |
| Otimati | Province of KwaZulu-Natal | -29.1833333 | 31.15 | 593 | 1946 |
| Ottawa | Province of KwaZulu-Natal | -29.6666667 | 31.0333333 | 85 | 279 |
| Ottensville | Limpopo Province | -24.7666667 | 29.5 | 926 | 3038 |
| Otterburn | Province of KwaZulu-Natal | -29.1333333 | 29.6166667 | 1657 | 5436 |
| Otterburn | Province of Eastern Cape | -30.1833333 | 28.9666667 | 1574 | 5164 |
| Otterford | Province of Eastern Cape | -33.7838889 | 25.0194444 | 462 | 1516 |
| Ottosdal | Province of North-West | -26.8166667 | 26.0166667 | 1509 | 4951 |
| Ou Tol | Province of Eastern Cape | -30.65 | 27.1333333 | 1470 | 4823 |
| Oubosrand | Province of Eastern Cape | -34.0058333 | 24.2194444 | 238 | 781 |
| Oubosstrand | Province of Eastern Cape | -34.05 | 24.2 | 166 | 545 |
| Ouda Brug | Province of the Western Cape | -34.1666667 | 19.0333333 | 298 | 978 |
| Oude Bosch | Province of the Western Cape | -34.3166667 | 18.9666667 | 58 | 190 |
| Oudekraal | Province of the Western Cape | -33.9833333 | 18.35 | -3 | -10 |
| Oudekraalfontein | Province of the Western Cape | -33.0666667 | 18.3333333 | 49 | 161 |
| Ouderdom | Province of KwaZulu-Natal | -27.3166667 | 31.6 | 289 | 948 |
| Oudtshoorn | Province of the Western Cape | -33.5833333 | 22.2 | 319 | 1047 |
