The Transvaal Agricultural Union of South Africa (TAU SA) is a commercial farmers union in South Africa. Its main goal is to protect private property rights and the safety of South African farmers. The TAU SA seeks to protect the agricultural sector in South Africa against what it perceives to be the attacks by communism. The vast majority of the TAU members are Boer/Afrikaner descent.
The TAU has been in existence since 1897. Although it was an organisation exclusively for farmers in the Transvaal at first, many farmers from other South African Provinces have joined the organization in recent years, because of dissatisfaction with other, liberal agricultural organizations throughout the country. It has a large number of members in the Free State province. The current president is Paul Van der Walt and the Vice-President is Wille Lewies. It also has seven district chairmen throughout the country. It holds its national congress annually.