F
| Town name | Postal code |
| Faerie Glen | 0043 |
| Faerie Glen | 0081 |
| Fauresmith | 9978 |
| Ficksburg | 9730 |
| Ficksburg | 9732 |
| Firgrove | 7130 |
| Fish Hoek | 7975 |
| Fish Hoek | 7976 |
| Fish Hoek | 7977 |
| Fish Hoek | 7978 |
| Fish Hoek | 7979 |
| Fish Hoek | 7985 |
| Fish Hoek | 7990 |
| Fish Hoek | 7995 |
| Fishhoek | 7975 |
| Flagstaff | 4810 |
| Flagstaff | 4811 |
| Flagstaff | 4812 |
| Flagstaff | 4813 |
| Flagstaff | 4814 |
| Flagstaff | 4821 |
| Florida | 1700 |
| Florida | 1701 |
| Florida | 1708 |
| Florida | 1709 |
| Florida | 1711 |
| Florida | 1712 |
| Florida | 1715 |
| Florida | 1716 |
| Florida | 1724 |
| Florida | 2114 |
| Fochville | 2515 |
| Fort Beaufort | 5720 |
| Fort Beaufort | 5730 |
| Four Ways | 2055 |
| Four Ways | 2191 |
| Fouriesburg | 9725 |
| Frankfort | 9830 |
| Franschhoek | 7690 |
| Franschhoek | 7691 |
| Fraserburg | 6960 |
| Free State | 9430 |
| Free State | 9431 |
| Free State | 9535 |
| Free State | 9958 |
