L
| Town Name | Postal code |
| Ladismith | 6655 |
| Ladismith | 6656 |
| Ladismith | 6690 |
| Lady Frere | 5341 |
| Lady Frere | 5410 |
| Lady Frere | 5411 |
| Lady Frere | 5412 |
| Lady Frere | 5414 |
| Lady Frere | 5415 |
| Lady Frere | 5416 |
| Lady Frere | 5417 |
| Lady Frere | 5418 |
| Lady Frere | 5419 |
| Lady Grey | 9755 |
| Ladybrand | 9745 |
| Ladybrand | 9746 |
| Ladybrand | 9748 |
| Ladysmith | 3360 |
| Ladysmith | 3370 |
| Ladysmith | 3371 |
| Ladysmith | 3373 |
| Ladysmith | 3374 |
| Ladysmith | 3375 |
| Ladysmith | 3377 |
| Ladysmith | 3378 |
| Ladysmith | 3380 |
| Ladysmith | 3382 |
| Ladysmith | 3384 |
| Ladysmith | 2900 |
| Laingsburg | 6901 |
| Lakeside | 7945 |
| Lambertsbaai | 8130 |
| Lamontville | 4027 |
| Landsdowne | 7780 |
| Langa | 7455 |
| Langebaan | 7357 |
| Lansdowne | 7700 |
| Lansdowne | 7764 |
| Lansdowne | 7770 |
| Lansdowne | 7780 |
| Lansdowne | 7790 |
| Laudium | 0037 |
| Lavender Hill | 7945 |
| Lavistown | 7490 |
| Leeudoringstad | 2640 |
| Leeupoort | 0486 |
| Lenasia | 1809 |
| Lenasia | 1821 |
| Lenasia | 1823 |
| Lenasia | 1827 |
| Lenasia | 1828 |
| Lenasia | 1829 |
| Lenasia | 1830 |
| Lenasia | 1833 |
| Lenasia | 1835 |
| Lenasia | 1838 |
| Lengau | 9503 |
| Lerato | 2868 |
| Lerato | 2870 |
| Lerato | 2873 |
| Lerato | 2880 |
| Leslie | 2265 |
| Letaba | 0870 |
| Letaba | 0877 |
| Letaba | 0878 |
| Letlhabile | 0264 |
| Letsitele | 0771 |
| Letsitele | 0772 |
| Letsitele | 0885 |
| Letsitele | 0886 |
| Letsitele | 0890 |
| Libode | 5160 |
| Libode | 5161 |
| Libode | 5162 |
| Libode | 5163 |
| Lichtenburg | 2730 |
| Lichtenburg | 2740 |
| Lichtenburg | 2741 |
| Lichtenburg | 2742 |
| Lichtenburg | 2743 |
| Lichtenburg | 2754 |
| Lichtenburg | 2755 |
| Lichtenburg | 2762 |
| Lindley | 9630 |
| Link Hills | 3610 |
| Link Hills | 3655 |
| Linton Grange | 6025 |
| Loeriesfontein | 8185 |
| Lonsdale | 0710 |
| Lonsdale | 0729 |
| Lonsdale | 0767 |
| Louis Trichardt | 0901 |
| Louis Trichardt | 0905 |
| Louis Trichardt | 0909 |
| Louis Trichardt | 0917 |
| Louis Trichardt | 0920 |
| Louis Trichardt | 0921 |
| Louis Trichardt | 0922 |
| Louis Trichardt | 0923 |
| Louis Trichardt | 0924 |
| Louis Trichardt | 0925 |
| Louis Trichardt | 0934 |
| Louis Trichardt | 0935 |
| Louis Trichardt | 0937 |
| Louis Trichardt | 0939 |
| Louis Trichardt | 0940 |
| Louis Trichardt | 0942 |
| Louis Trichardt | 0943 |
| Louis Trichardt | 0948 |
| Louis Trichardt | 0949 |
| Louis Trichardt | 0954 |
| Louis Trichardt | 0957 |
| Louis Trichardt | 0960 |
| Luckhoff | 9982 |
| Luckhoff | 9986 |
| Lusikisiki | 4820 |
| Lusikisiki | 4822 |
| Lusikisiki | 4824 |
| Lusikisiki | 4825 |
| Lusikisiki | 4828 |
| Lutzville | 8149 |
| Lydenburg | 1120 |
| Lydenburg | 1122 |
| Lydenburg | 1123 |
| Lydenburg | 1126 |
| Lynn East | 0186 |
| Lyttelton | 0051 |
| Lyttelton | 0157 |
| Lyttelton | 0163 |
