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The following lists events that happened during 1873 in South Africa.
Incumbents
- Governor of the Cape of Good Hope and High Commissioner for Southern Africa: Sir Henry Barkly.
- Lieutenant-governor of the Colony of Natal:
- Sir Anthony Musgrave (until 29 April).
- Thomas Milles (acting from 30 April to 21 July).
- Sir Benjamin Pine (from 22 July).
- State President of the Orange Free State: Jan Brand.
- State President of the South African Republic: Thomas François Burgers.
- Lieutenant-Governor of Griqualand West: Sir Richard Southey (from 17 July).
- Prime Minister of the Cape of Good Hope: Sir John Molteno.
Events
;April
- 30 – Thomas Milles becomes acting Lieutenant-governor of the Colony of Natal.
May
- 1 – The use of Dutch is officially allowed in the Cape of Good Hope's parliament.
- 14 – The Ohrigstad area is proclaimed a public gold field after gold is discovered in the Selati River.
July
- 5 – New Rush in Griqualand West is renamed Kimberley after John Wodehouse, 1st Earl of Kimberley.
- 17 – Sir Richard Southey becomes the first Lieutenant-Governor of Griqualand West.
Unknown date
- The University of South Africa is founded in Cape Town as the University of the Cape of Good Hope.
- The Cape Government establishes the first district boarding schools to educate children from rural areas while education is standardised at the Cape.
- The town of East London is officially established through the proclaimed merger of the three settlements of Panmure, East London and East London East.
- Warmbad is established as Hartingsburg at the hot springs north of Pretoria.
Births
- 13 August – C.J. Langenhoven, playwright, poet, journalist, politician and author of Die Stem van Suid-Afrika. (d. 1932)
- 20 August – William Henry Bell, musician, composer and first director of the South African College of Music. (d. 1946)
Deaths
- 1 May – David Livingstone is found dead on his knees beside his bed at Lake Bangweolo. (b. 1813)
Railways
thumb|[[East London Harbour 0-4-0|East London Harbour Board 0-4-0]]
Railway lines opened
- Namaqualand – Muishondfontein to Kookfontein, .
Locomotives
- Two Cape gauge 0-4-0 saddle tank locomotives enter service at Port Elizabeth on the Midland System of the Cape Government Railways. They are the first Cape gauge locomotives to enter service in South Africa.
- East London's first steam locomotive is landed at East London Harbour, a Brunel gauge 0-4-0 vertical boiler engine acquired for work on breakwater construction.
