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The following lists events that happened during 1975 in South Africa.
Incumbents
- State President:
- Jim Fouché (until 8 April).
- Jan de Klerk (acting from 9 to 18 April).
- The United States and Zaire request South Africa to provide training and support for the FNLA and UNITA.
;November
- 11 – The People's Republic of Angola becomes independent from Portugal.
- 13–28 – In the Battle for Ebo, SADF and Angolan forces clash at Ebo in the Cuanza Sul province of Angola.
- 19 – The United States Congress approves the Clark Amendment, ending aid to the FNLA and UNITA.
- 25 – A South African Air Force Cessna 185 is shot down south of Ebo, killing pilot 2nd Lieutenant Keith Williamson, co-pilot 2nd Lieutenant Eric Thompson and South African Army battalion third-in-command Captain Danie Taljaard.
- 28 – South African Navy frigates evacuate 26 SADF members from behind enemy lines at Ambrizete, north of Luanda in Angola.
;Unknown date
- Lillian Ngoyi's ban, confining her to Orlando Township in Johannesburg and forbidding her to attend any gatherings, is renewed for five years.
- The South West African Police Counter-Insurgency Unit, commonly known as Operation K, is launched.
- Operation Polo, South Africa's covert military intervention in the Rhodesian Bush War, begins.
Births
- 9 January – André Vos, rugby player
- 29 January – David Tlale, fashion designer and businessman.
- 2 February – Thinus Delport, rugby player
- 4 February – Sthandiwe Kgoroge, actress.
- 21 March – Corné Krige, rugby player.
- 27 March – Bruce Jacobs, field hockey player.
- 14 April – Raymond Seopa, professional footballer.
- 16 April – Selborne Boome, rugby player.
- 23 June – Sibusiso Zuma, soccer player
- 2 July – Stefan Terblanche, rugby player.
- 7 July – Louis Koen, rugby player
- 17 July – Robbie Fleck, rugby player & coach.
- 31 July – Andrew Hall, cricketer
- 7 August – Charlize Theron, actress.
- 1 September – Winnie Ntshaba, actress.
- 11 September – Pierre Issa, soccer player
- 16 October – Jacques Kallis, all-rounder cricketer.
- 24 November – Neil McKenzie, cricketer
- 13 December – Bubu Mazibuko, actress.
- 17 December – Tim Clark, golfer.
thumb|[[South African Class 36-000|Class 36-000 (GE SG10B)]]
Deaths
- 21 February – Pieter Voltelyn Graham van der Byl, politician (b. 1889)
- 8 May – Bram Fischer, former South African Communist Party leader. (b. 1908)
Railways
Locomotives
- June – The South African Railways places the first of 124 Class 36-000 General Electric type SG10B diesel-electric locomotives in service.