<!-- "none" is preferred when the title is sufficiently descriptive -->
<!-- IF POSSIBLE, PLEASE USE PRESENT TENSE -->
The following lists events that happened during 1925 in South Africa.
Incumbents
- Monarch: King George V.
- Governor-General and High Commissioner for Southern Africa: The Earl of Athlone.
- Prime Minister: J.B.M. Hertzog.
- Chief Justice: James Rose Innes.
Events
;May
- 1 – The Prince of Wales arrives in Cape Town on a visit to South Africa.
;July
- 23 – D.F. Malan, Minister of the Interior, introduces the Areas Reservation and Immigration and Registration Bill, also known as the Asiatic Bill.
;Augustus
- 1 – The New Cape Central Railway and its long line between Worcester and Voorbaai is incorporated into the South African Railways (SAR).
;Unknown date
- Afrikaans officially replaces Dutch as the second official language after English.
- The manor house of Groot Constantia is gutted by a fire.
- The University of Pretoria begins the tradition of Jool in South Africa.
- South Africa returns to the gold standard.
Births
- 14 April – Colin Eglin, founding member and leader of the Progressive Federal Party. (d. 2013)
- 4 May – Ruth First, journalist, academic and activist. (d. 1982)
- 6 June – Andrew Mlangeni, anti-apartheid activist. (d. 2020)
- 19 June – Alfred Nzo, anti-apartheid activist. (d. 2000)
- 28 September – Cromwell Everson, composer. (d. 1991)
- 5 October – Herbert Kretzmer, journalist and lyricist (d. 2020)
- 14 October – Phillip Tobias, palaeoanthropologist. (d. 2012)
Deaths
- 30 August – Cathcart William Methven, civil engineer and painter. (b. 1849)
Railways
thumb|[[South African Class FC 2-6-2+2-6-2|Class FC Modified Fairlie]]
thumb|[[South African Class GD 2-6-2+2-6-2|Class GD Garratt]]
thumb|[[South African Class GG 2-6-2+2-6-2|Class GG Garratt]]
thumb|[[South African Class 16D 4-6-2|Class 16D]]
thumb|[[South African Class 1E|Class 1E]]
Railway lines opened
- 21 January – Transvaal – Rustenburg to Boshoek, .
- The first four Class GD branchline 2-6-2+2-6-2 Garratt articulated locomotives.
- The first six of eighteen Class GE 2-8-2+2-8-2 Garratt locomotives.
