| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Oakley | city | | South Africa | -24.95 | 31.2 | 1479 | 28460 |
| Oberholzer | city | | South Africa | -26.3333333 | 27.3666667 | 4832 | 38317 |
| Oberholzer Settlement | city | | South Africa | -26.35 | 27.3 | 4734 | 42628 |
| Ofcolaco | city | | South Africa | -24.1 | 30.3833333 | 2116 | 5906 |
| Ogies | city | | South Africa | -26.05 | 29.0666667 | 5275 | 7424 |
| Ohrigstad | city | | South Africa | -24.75 | 30.5666667 | 3792 | 803 |
| Ohrigstad Settement | city | | South Africa | -24.7166667 | 30.5666667 | 3313 | 803 |
| Ohrigstad Settlement | city | | South Africa | -24.7166667 | 30.5666667 | 3313 | 803 |
| Okkerneutboom | city | | South Africa | -24.6 | 31.1166667 | 2099 | 22459 |
| Olifantsfontein | city | | South Africa | -25.9638889 | 28.2394444 | 5137 | 114829 |
| Olifantshoek | city | | South Africa | -23.3333333 | 30.2833333 | 1909 | 32520 |
| Olverton | city | | South Africa | -25.0669444 | 28.1897222 | 3464 | 24107 |
| Olyfberg | city | | South Africa | -23.7666667 | 29.95 | 4393 | 1341 |
| Onderstepoort | city | | South Africa | -25.6505556 | 28.1841667 | 3927 | 32687 |
| Ons Hoop | city | | South Africa | -23.5666667 | 27.7166667 | 2647 | 411 |
| Onverwacht | city | | South Africa | -23.6833333 | 27.6833333 | 2801 | 411 |
| Onverwag | city | | South Africa | -24.8333333 | 31 | 3149 | 24645 |
| Onverwags | city | | South Africa | -26.8833333 | 29.1333333 | 5229 | 2147 |
| Oochock | city | | South Africa | -23.6 | 30.55 | 1620 | 22973 |
| Oogies | city | | South Africa | -26.05 | 29.0666667 | 5275 | 7424 |
| Oos-Driefontein | city | | South Africa | -26.3833333 | 27.4833333 | 5288 | 30430 |
| Ooseinde | city | | South Africa | -26.1333333 | 26.1833333 | 4878 | 1834 |
| Ooster | city | | South Africa | -26.15 | 27.6333333 | 5538 | 18425 |
| Ophir | city | | South Africa | -26.5333333 | 27.9833333 | 4940 | 30202 |
| Oporto | city | | South Africa | -22.6666667 | 29.6333333 | 2165 | 358 |
| Opraap | city | | South Africa | -26.5166667 | 26.55 | 4445 | 4496 |
| Orange Grove | city | | South Africa | -26.1666667 | 28.0833333 | 5836 | 350565 |
| Orangia | city | | South Africa | -26.9333333 | 26.8166667 | 4245 | 7667 |
| Oranje | city | | South Africa | -26.1833333 | 29.9 | 5423 | 1431 |
| Orinoco | city | | South Africa | -24.7666667 | 31.0833333 | 1984 | 28403 |
| Orkney | city | | South Africa | -26.9833333 | 26.6666667 | 4215 | 8374 |
| Orlando | city | | South Africa | -26.2666667 | 27.8666667 | 5314 | 286098 |
| Orlando | city | | South Africa | -26.25 | 27.9166667 | 5216 | 352159 |
| Oshoek | city | | South Africa | -25.2 | 30.2 | 6354 | 803 |
| Ottensville | city | | South Africa | -24.7666667 | 29.5 | 2939 | 15527 |
| Ottosdal | city | | South Africa | -26.8166667 | 26.0166667 | 4855 | 1794 |
| Ottosdrif | city | | South Africa | -26.7 | 27.75 | 4780 | 64739 |
| Ottosdrift | city | | South Africa | -26.7 | 27.75 | 4780 | 64739 |
| Ottoshoop | city | | South Africa | -25.75 | 25.95 | 4652 | 708 |
| Ou Thomas se Loop | city | | South Africa | -25.3166667 | 26.55 | 3428 | 4327 |
| Ouklip | city | | South Africa | -24.7 | 28.1 | 4881 | 1028 |
| Overysel | city | | South Africa | -23.65 | 28.15 | 2919 | 689 |
| Overyssel | city | | South Africa | -23.65 | 28.15 | 2919 | 689 |
| Overyzel | city | | South Africa | -23.65 | 28.15 | 2919 | 689 |
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