| Mountain | State | Latitude | Longitude | Elevation (meters) | Elevation (feet) |
|---|
| Sikhaleni | Province of KwaZulu-Natal | -28.95 | 29.35 | 1626 | 5335 |
| Sikhanyisweni | Province of KwaZulu-Natal | -28.4666667 | 30.4 | 1334 | 4377 |
| Sikhonkwane | Province of KwaZulu-Natal | -28.3166667 | 30.9333333 | 1079 | 3540 |
| Sikhova | Province of Eastern Cape | -30.8 | 28.6 | 1598 | 5243 |
| Sikhunyana | Province of KwaZulu-Natal | -28.2833333 | 30.1333333 | 1115 | 3658 |
| Sikhuthe | Province of KwaZulu-Natal | -27.1333333 | 32.0666667 | 227 | 745 |
| Sikolipati | Province of Eastern Cape | -31.7833333 | 27.2333333 | 1083 | 3553 |
| Silasberg | Free State | -28.4833333 | 28.7333333 | 1750 | 5741 |
| Silutshana | Province of KwaZulu-Natal | -28.4 | 30.7833333 | 1239 | 4065 |
| Simakade | Province of KwaZulu-Natal | -27.3166667 | 30.4333333 | 1845 | 6053 |
| Simakade | Mpumalanga | -27.1833333 | 30.4666667 | 1719 | 5640 |
| Simenya | Province of KwaZulu-Natal | -28.45 | 31.4333333 | 606 | 1988 |
| Simonsberg | Province of the Western Cape | -34.2 | 18.4333333 | 317 | 1040 |
| Simonsberg | Province of the Western Cape | -33.8833333 | 18.9333333 | 831 | 2726 |
| Simonskop | Province of the Western Cape | -34.0833333 | 19.5 | 372 | 1220 |
| Sinembe | Province of KwaZulu-Natal | -29.4833333 | 31.0833333 | 312 | 1024 |
| Singqongqo | Province of KwaZulu-Natal | -28.4 | 31.3833333 | 478 | 1568 |
| Sinkonkonko | Province of KwaZulu-Natal | -28 | 31.9166667 | 338 | 1109 |
| Sinqeni | Province of KwaZulu-Natal | -27.4 | 31.1833333 | 925 | 3035 |
| Sinqindi | Province of KwaZulu-Natal | -28.3666667 | 30.5 | 1261 | 4137 |
