South Africa, officially the Republic of South Africa, is the southernmost country in Africa. With over 59 million people, it is the world's 23rd-most populous nation and covers an area of 1,221,037 square kilometres. South Africa has three capital cities: executive Pretoria, judicial Bloemfontein and legislative Cape Town. The largest city is Johannesburg. About 80% of South Africans are of Black African ancestry, divided among a variety of ethnic groups speaking different African languages. The remaining population consists of Africa's largest communities of European, Asian, and Multiracial ancestry.
It is bounded to the south by 2,798 kilometres of coastline of Southern Africa stretching along the South Atlantic and Indian Oceans; to the north by the neighbouring countries of Namibia, Botswana, and Zimbabwe; and to the east and northeast by Mozambique and Eswatini; and it surrounds the enclaved country of Lesotho. It is the southernmost country on the mainland of the Old World, and the most populous country located entirely south of the equator. South Africa is a biodiversity hotspot, with a diversity of unique biomes and plant and animal life.