31 – The Union of South Africa is established from the former British colonies of the Cape of Good Hope, Natal, Transvaal and Orange Free State.
31 – Herbert John Gladstone becomes the first Governor-General of the Union of South Africa.
31 – Louis Botha becomes the first Prime Minister of the Union of South Africa.
The Girl Guides movement is established.
The white population in South Africa is 21.5% of the total.
Witwatersrand gold mine owners come under pressure to improve sanitary conditions since a third of the black miners are dying of pneumonia.
The Pretoria and Johannesburg branches of the Transvaal University College (TUC) split into independent institutions. The branches will later become the University of Pretoria (Tuks) and the University of the Witwatersrand (Wits) respectively.
24 March – Adolph Gysbert (Sailor) Malan, World War II fighter pilot, is born in Wellington, Western Cape. (d. 1963)
9 July – Govan Mbeki, anti-apartheid activist and politician. (d. 2001)
30 September – Gagathura Mohambry Naicker, medical doctor and prominent politician. (d. 1978)
21 March – Cape Eastern – Riverside (Natal) to Malenge, 8 miles 24 chains (13.4 kilometres).
27 April – Natal – Utrecht Junction to Utrecht, 26 miles (41.8 kilometres).
29 April – Transvaal – Belfast to Lydenburg, 64 miles 40 chains (103.8 kilometres).
15 May – Transvaal – Komatipoort to Newington, 68 miles 25 chains (109.9 kilometres).
4 July – Transvaal – Dunswart to Cranbourne, 3 miles 14 chains (5.1 kilometres).
Four new Cape gauge locomotive types enter service on the Natal Government Railways (NGR):
Two Class A 4-6-2 Pacific type locomotives, built in their Durban workshops. In 1912 these locomotives will be designated Class 2C on the South African Railways (SAR).
A single Class B 4-8-2 Mountain type locomotive, also known as the America D and nicknamed "Maud Allan" by the enginemen. In 1912 it will be designated Class 3A on the SAR.
Twenty-one Class B 4-8-0 Mastodon type tender locomotives. In 1912 they will be designated Class 1A on the SAR.
Five 2-6-6-0 Mallet articulated compound steam locomotives. In 1912 they will be designated Class MB on the SAR.
Five new Cape gauge locomotive types enter service on the Central South African Railways (CSAR):
In March, ten Class 10-2 4-6-2 Pacific type steam locomotives, five with and five without superheaters. In 1912 they will be designated Class 10A (saturated steam) and Class 10B (superheated) on the SAR.
Twelve lighter Class 10-C 4-6-2 Pacific type locomotives. In 1912 they will be designated Class 10C on the SAR.
One American-built Class 10 4-6-2 Pacific type. In 1912 it will be designated the sole Class 10D on the SAR.
Also in March, a single experimental 2-6-6-2 Mallet articulated locomotive. In 1912 it will be designated Class MD on the SAR.
1910 in South Africa Wikipedia