Namibia – South Africa relations refers to the current and historical relationship between Namibia and South Africa. South Africa conquered the area now known as Namibia from Germany during World War I and occupied it until 1990, when it gained independence. During those 75 years, thousands of South Africans settled in Namibia and South Africa treated the area as an internal province rather than occupied foreign entity, imposing apartheid laws in Namibia as it did in South Africa.
Upon independence in 1990, Namibia's economy was still tied to South Africa's. To this day, the economy of Namibia is still closely contacted to South Africa through both institutional relationships (Southern African Customs Union, for example) and privately owned mining concessions. The South African rand is still legal currency within Namibia, while the Namibian dollar is not so in South Africa and the currencies are traded on par locally. In 2010, trade between the two states totaled 436,689 South African Rand (approximately US $64 million), down from 927,917 rand in 2007.