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The following lists events that happened during 1919 in South Africa.
Incumbents
- Monarch: King George V.
- Governor-General and High Commissioner for Southern Africa: The Viscount Buxton.
- Prime Minister:
- Louis Botha (until 27 August).
- Jan Smuts (from 3 September).
- Chief Justice: James Rose Innes
Events
;April
- 23 – The Potchefstroom Teachers' College opens.
;August
- 27 – Prime Minister Louis Botha dies in office.
;September
- 3 – Jan Smuts becomes the 2nd Prime Minister of South Africa.
- 17 – German South West Africa is placed under South African administration.
;November
- 7 – Inspired by Cape Town's daily Noon Gun Three Minute Pause, King George V institutes the Two Minute Silence following a suggestion by Sir Percy Fitzpatrick, to be observed annually at the Eleventh Hour of the Eleventh Day of the Eleventh Month.
- 7 – The first Remembrance Day is observed in the British Empire with a two-minute silence at 11:00 hours.
Locomotives
Two new Cape gauge and one narrow gauge locomotive types enter service on the South African Railways (SAR):
- The first of sixty-seven South African Class 12A 4-8-2| 4-8-2 Mountain type locomotives.
- The first ten Class 16C 4-6-2 Pacific type passenger steam locomotives.
- Three Class NG G11 2-6-0+0-6-2 Garratt locomotives on the Avontuur narrow gauge line through the Langkloof, the first Garratt locomotives to enter service in South Africa.
