List of Mountains in South Africa, Lesotho and Eswatini is a general list of mountains in South Africa, Lesotho and Eswatini with elevation. This list includes mountains in two other sovereign states, in the Stormberg-Drakensberg range, where the highest elevations are to be found in Lesotho, as well as Emlembe, the highest mountain in Eswatini, located at the border with South Africa. The highest mountain in South Africa is 3,450 metres (11,320 ft) high Mafadi, located on the border of South Africa and Lesotho.

The Dernberg is one of the most notable mountains in the Richtersveld and the Ais/Richtersveld Transfrontier Park, on the border between South Africa and Namibia. This region is noted for its extreme dryness and Dernberg is an important landmark in the Zebrawater watershed that ultimately feeds into the Orange River, South Africa's biggest river.

Ghaamsberg is a mountain in South Africa. situated just east of Aggeneys, in the Namakwa District Municipality of the Northern Cape province, 33 km to the south of the border with Namibia. Its summit is 1148 metres above sea level.

Hanglip, thavha ya VhaDzanani is a prominent mountain peak near Louis Trichardt, South Africa. It is situated in the Vhembe District of Limpopo in the central Soutpansberg range. The peak with radar station, at 1,719 meters a.s.l., forms a conspicuous landmark visible from the town and the N1 national road.

Mascarin Peak, is the highest mountain on Marion Island, with a height of 1,230 metres (4,040 ft). Marion Island is the largest island of the Prince Edward Islands in the sub-Antarctic Indian Ocean. The islands belong to South Africa and are administered by the South African National Antarctic Programme.

Mont-aux-Sources is a mountain in Southern Africa, forming one of the highest portions of the Drakensberg Range. It is mostly within Lesotho, with parts in the KwaZulu-Natal and Free State provinces of South Africa.

The Pilanesberg is a mountain in the North West Province, South Africa. The mountain is an ancient volcanic structure, circular in shape, that rises from flat surrounding plains. It is formed by three concentric ridges or rings of hills, of which the outermost has a diameter of about 24 km. The Pilanesberg is located 100 km to the North-West of Pretoria and is for the greater part enclosed in a protected area known as Pilanesberg Game Reserve.