<!-- "none" is preferred when the title is sufficiently descriptive -->
<!-- IF POSSIBLE, PLEASE USE PRESENT TENSE -->
The following lists events that happened during 1903 in South Africa.
Incumbents
Cape Colony
- Governor of the Cape of Good Hope:Walter Hely-Hutchinson.
- Prime Minister of the Cape of Good Hope: John Gordon Sprigg.
Natal
- Governor of the Colony of Natal: Henry Edward McCallum.
- Prime Minister of the Colony of Natal: Albert Henry Hime (until 17 August), George Morris Sutton (starting 17 August).
Orange River Colony
- Governor of the Orange River Colony and High Commissioner for Southern Africa: Alfred Milner, 1st Viscount Milner.
- Lieutenant-Governor of the Orange River Colony: Hamilton Goold-Adams.
Transvaal
- Governor of the Transvaal and High Commissioner for Southern Africa: Alfred Milner, 1st Viscount Milner.
- Lieutenant-Governor of the Transvaal: Arthur Lawley.
Events
;February
- Mahatma Gandhi enrolls to the Bar of the Transvaal Supreme Court.
;March
- 12 – Andries Dreyer, an archivist of the Dutch Reformed Church, is ordained as a missionary of the congregation for the Hanover Street area in Cape Town.
;May
- 21 – The first contingent of Chinese labourers leave China to work on the Witwatersrand gold mines.
;June
- 4 – The Indian Opinion is started by Mahatma Gandhi with Mansukhlal Nazar as editor.
;Unknown date
- The County of Pembroke, a British cargo ship, is shipwrecked near Port Elizabeth.
Births
- 11 January – Alan Paton, author and founder of the Liberal Party of South Africa, is born in Pietermaritzburg, Natal.
- 21 March – J. B. Marks, political activist and trade unionist, is born in Ventersdorp. (d. 1972)
- 4 May – Louise Behrens, novelist and Afrikaans journalist, is born in the Orange River Colony.
- 4 May – Hendrik Susan, orchestra leader and violist.
- 19 June – Wally Hammond, English first-class cricketer and South African sports administrator. (d. 1965)
- 8 October – Mikro (Pseudonym for C.H. Kühn), writer and poet, is born at Van Reenens Farm in the Williston district.
Deaths
- 21 February – Kate Vaughan, British dancer and actress (born 1852)
- 13 March – General David Johannes Joubert (Ou Kat), a South African explorer to East Africa, dies of malaria near Dar es Salaam, Tanzania.
- 8 August – Adolf Schiel, German-born officer in Boer armed forces. (b. 1858)
Railways
thumb|[[CGR 3rd Class 4-4-0 1903|CGR Wynberg Tender]]
thumb|[[South African Class 5A 4-6-2|CGR Karoo Class]]
thumb|[[South African Class 8D 4-8-0|SAR Class 8D]]
thumb|[[South African Class Experimental 4 2-8-2|CGR 9th Class]]
thumb|[[CGR Kitson-Meyer 0-6-0+0-6-0|CGR Kitson-Meyer]]
thumb|[[CGR NG 0-4-0T]]
thumb|[[South African Dock Shunter 0-4-0ST|Cape PWD Thebus]]
thumb|[[South African Class H1 4-8-2T|CSAR Class E 4-8-2T]]
thumb|[[South African Class 8C 4-8-0|CSAR Class 8-L3]]
Railway lines opened
- 19 February – Cape Central – Swellendam to Riversdale, .
- 28 February – Cape Western – Kalbaskraal to Hopefield (Narrow gauge), .
- 22 March – Free State – Sannaspos to Thaba 'Nchu, .
- Two Karoo Class 4-6-2| Pacific passenger locomotives. In 1912 they will be designated Class 5A on the South African Railways (SAR).
- A single experimental 0-6-0+0-6-0| Kitson-Meyer type articulated steam locomotive on the Eastern System.
- A single Krauss 0-6-0 tank locomotive, also for use as construction engine on the Avontuur branch.
