South Africa contains some of the oldest archaeological sites in Africa. Extensive fossil remains at the Sterkfontein, Kromdraai and Makapansgat caves suggest that various australopithecines existed in South Africa from about three million years ago. These were succeeded by various species of Homo, including Homo habilis, Homo erectus and modern man, Homo sapiens. Bantu-speaking peoples (the term Bantu is a linguistic term not an ethnic one), iron-using agriculturists and herdsmen, moved south of the Limpopo River into modern-day South Africa by the 4th or 5th century (the Bantu expansion). They slowly moved south and the earliest ironworks in modern-day KwaZulu-Natal Province are believed to date from around 1050. The southernmost group was the Xhosa people, reaching the Fish River, in today's Eastern Cape Province. These Iron Age populations displaced earlier hunter-gatherer peoples as they migrated.

Painting of an account of the arrival of Jan van Riebeeck.

The written history of South Africa begins with the accounts of European navigators passing South Africa on the East Indies trade routes. Subsequent to the first circumnavigation of the Cape in 1488 by the Portuguese Explorer Bartolomeu Dias a number of shipwrecks occured along the Southern African coast. Along with the accounts of the early navigators, the accounts of shipwreck survivors provide the earliest written accounts of Southern Africa. In the two centuries following 1488 a number of small fishing settlements were made along the coast by Portugese sailors, but no written account of these settlements survives. In 1652 a victualling station was established at the Cape of Good Hope by Jan van Riebeeck on behalf of the Dutch East India Company. For most of the 17th and 18th centuries, the slowly expanding settlement was a Dutch possession. The Dutch settlers eventually met the southwesterly expanding Xhosa people in the region of the Fish River. A series of wars, called Cape Frontier Wars, ensued, mainly caused by conflicting land and livestock interests.

To ease Cape labour shortages slaves were imported from Indonesia, Madagascar, and India. Furthermore, troublesome leaders, often of royal descent, were banished from Dutch colonies to South Africa. This group of slaves eventually gave rise to a population that now identifies themselves as "Cape Malays," a predominantly Muslim group. Cape Malays have traditionally been accorded a higher social status by the European colonists - many became wealthy landowners, but became increasingly dispossessed as Apartheid developed. Cape Malay mosques in District Six were spared, and now serve as monuments for the destruction that occurred around them.

Most of the descendants of these slaves, who often married with Dutch settlers, were later classified together with the remnants of the Khoikhoi as Cape Coloureds. Further intermingling within the Cape Coloured population itself, as well as with Xhosa and other South African tribes, now means that they constitute roughly 50% of the population in the Western Cape Province.

Great Britain seized the Cape of Good Hope area in 1797 during the Fourth Anglo-Dutch War. The Dutch declared bankruptcy, and the British annexed the Cape Colony in 1805. The British continued the frontier wars against the AmaXhosa, pushing the eastern frontier eastward through a line of forts established along the Fish River and consolidating it by encouraging British settlement. Due to pressure of abolitionist societies in Britain, the British parliament first stopped its global slave trade in 1806, then abolished slavery in all its colonies in 1833.

The discovery of diamonds in 1867 and gold in 1886 encouraged economic growth and immigration, intensifying the subjugation of the natives. The Boers successfully resisted British encroachments during the First Boer War (1880–1881) using tactics much better suited to local conditions. For example, the Boers wore khaki clothing, which was the same colour as the earth, whereas the British wore bright red uniforms, making them easy targets for Boer sharpshooters. The British returned in greater numbers without their red jackets in the Second Boer War (1899–1902), which was largely opposed by the Liberal Party in the British Parliament. The Boers' attempt to ally themselves with German South West Africa provided the British with yet another excuse to take control of the Boer Republics.

Boer women and children in British concentration camps.

The Boers resisted fiercely, but the British eventually overwhelmed the Boer forces, using their superior numbers and external supply chains and concentration camps as well as the controversial scorched earth tactic. The Treaty of Vereeniging specified full British sovereignty over the South African republics, and the British government agreed to assume the £3,000,000 war debt owed by the Afrikaner governments. One of the main provisions of the treaty ending the war was that 'Blacks' would not be allowed to vote, except in the Cape Colony.

After four years of negotiations, the Union of South Africa was created from the Cape and Natal colonies, as well as the republics of Orange Free State and Transvaal, on May 31, 1910, exactly eight years after the end of the Second Boer War. The newly-created Union of South Africa was a dominion. In 1934 the South African Party and National Party merged to form the United Party, seeking reconciliation between Afrikaners and English-speaking 'Whites', but split in 1939 over the Union's entry into World War II as an ally of the United Kingdom. The right-wing National Party sympathised with Nazi Germany during the war, and sought greater racial segregation, or apartheid, after it.

In 1948, the National Party was elected to power, and began implementing a series of harsh segregationist laws that would become known collectively as apartheid. Not surprisingly, this segregation also applied to the wealth acquired during rapid industrialization of the 1950s, '60s, and '70s. While the White minority enjoyed the highest standard of living in all of Africa, often comparable to "First World" western nations, the Black majority remained disadvantaged by almost every standard, including income, education, housing, and life expectancy. However, the average income and life expectancy of a black, 'Indian' or 'colored' South African compared favorably to many other African states, such as Ghana and Tanzania.

Apartheid became increasingly controversial, leading to widespread sanctions and divestment abroad and growing unrest and oppression within South Africa. (See also special section on History of South Africa in the apartheid era.) A long period of harsh suppression by the government, and resistance, strikes, marches, protests, and sabotage, by various anti-apartheid movements, most notably the African National Congress (ANC), followed. In 1990 the National Party government took the first step towards negotiating itself out of power when it lifted the ban on the African National Congress and other left-wing political organisations, and released Nelson Mandela from prison after 27 years. Apartheid legislation was gradually removed from the statute books, and the first multi-racial elections were held in 1994. The ANC won by an overwhelming majority, and has been in power ever since.

Despite the end of apartheid, millions of South Africans, mostly black, continue to live in poverty. This is attributed to the legacy of the apartheid regime and, increasingly, what many see as the failure of the current government to tackle social issues, coupled with the monetary and fiscal discipline of the current government to ensure both redistribution of wealth and economic growth. However, the ANC's social housing policy has produced some improvement in living conditions in many areas by redirecting fiscal spending and improving the efficiency of the tax collection system.