White South Africans are South Africans of European descent. In linguistic, cultural, and historical terms, they are generally divided into the Afrikaans-speaking descendants of the Dutch East India Company's original colonists, known as Afrikaners, and the Anglophone descendants of predominantly British colonists of South Africa. White South Africans are by far the largest population of White Africans. White was a legally defined racial classification during apartheid.

White settlement in South Africa began with Dutch colonisation in 1652, followed by British colonisation in the 19th century, which led to tensions and further expansion inland by Boer settlers. Throughout the 19th and 20th centuries, waves of immigrants from Europe and continued to grow the white population, which peaked in the mid-1990s. Under apartheid, strict racial classifications enforced a legal and economic order that privileged the white minority. Post-apartheid reforms such as Black Economic Empowerment had the goal of redistributing business opportunities and market access to previously disadvantaged groups, prompting reports of newfound economic vulnerability among some white South Africans as material advantages and disadvantages were beginning to be brought to light. Since the 1990s, a large number of white South Africans have emigrated, due to concerns over crime and employment prospects, with a number returning in subsequent years. The white population in South Africa peaked between 1989 and 1995 at around 5.2 to 5.6 million due to high birth rates and immigration, then declined until the mid-2000s before experiencing a modest increase from 2006 to 2013.

As of the 2022 census, white South Africans make up 7.3% of the population, predominantly speak Afrikaans (61%) or English (36%), mostly identify as Christian (87%), and are unevenly distributed with the highest concentrations in Western Cape and Gauteng provinces. Former South African leaders have made controversial statements about Afrikaners’ identity and race relations, while apartheid enforced white minority rule and granted “honorary white” status to certain Asian immigrants and some African Americans. In South Africa, the legacy of apartheid continues to shape racial and economic dynamics.

The majority of Afrikaans-speaking (Afrikaners) and English-speaking White South Africans trace their ancestry to the 17th and 18th-century Dutch colonists or the 1820 British colonists. Other colonists included Huguenots who emigrated from France, and Walloons who emigrated from present-day Belgium. The remainder of the White South African population consists of later immigrants from Lebanon, and Europe such as Greeks and Norwegians. Portuguese immigrants arrived after the collapse of the Portuguese colonial administrations in Angola and Mozambique, although many also originate from Madeira.

Portuguese explorer Bartolomeu Dias was the first European to explore Southern Africa (the Cape of Good Hope and the Cape Agulhas) in 1488.

The history of white settlement in South Africa started in 1652 with the settlement of the Cape of Good Hope by the Dutch East India Company (VOC) under Jan van Riebeeck. Despite the preponderance of officials and colonists from the Netherlands, there were also a number of French Huguenots fleeing religious persecution at home and German soldiers or sailors returning from service in Asia. The Cape Colony remained under Dutch rule for two more centuries, after which it was annexed by the United Kingdom around 1806. At that time, South Africa was home to about 26,000 people of European ancestry, a relative majority of whom were still of Dutch origin. However, the Dutch settlers grew into conflict with the British government over the abolition of the Cape Colony slave trade and limits on colonial expansion into African lands. In order to prevent a frontier war, the British Parliament decided to send British settlers to start farms on the eastern frontier. Beginning in 1818 thousands of British settlers arrived in the growing Cape Colony, intending to join the local workforce or settle directly on the frontier. Ironically most of the farms failed due to the difficult terrain, forcing the British settlers to encroach on African land in order to practise pastoralism. About a fifth of the Cape's original Dutch-speaking white population migrated eastwards during the Great Trek in the 1830s and established their own autonomous Boer republics further inland. Nevertheless, the population of white ancestry (mostly European origin) continued increasing in the Cape as a result of settlement, and by 1865 had reached 181,592 people. Between 1880 and 1910, there was an influx of Jews (mainly via Lithuania) and immigrants from Lebanon and Syria arriving in South Africa. Recent immigrants from the Levant region of Western Asia were originally classified as Asian, and thus "non-white", but, in order to have the right to purchase land, they successfully argued that they were "white". The main reason being that they were Caucasian and from the lands in which Christianity and Judaism originated, and that the race laws did not target Jews, who were also a Semitic people. Therefore, arguing that if the laws targeted other people from the Levant, it should also affect the Jews.

The first nationwide census in South Africa was held in 1911 and indicated a white population of 1,276,242. By 1936, there were an estimated 2,003,857 white South Africans, and by 1946 the number had reached 2,372,690. The country began receiving tens of thousands of European immigrants, namely from Germany, Italy, the Netherlands, Greece, and the territories of the Portuguese Empire during the mid- to late twentieth century. South Africa's white population increased to over 3,408,000 by 1965, reached 4,050,000 in 1973, and peaked at 5,244,000 in 1994–95.

The number of white South Africans resident in their home country began gradually declining between 1990 and the mid-2000s as a result of increased emigration.