Louis Pienaar, South African lawyer and diplomat, Minister of Internal Affairs (b. 1926)

Louis Alexander Pienaar (23 June 1926 – 5 November 2012) was a South African lawyer and diplomat. He was the last white Administrator of South-West Africa, from 1985 through Namibian independence in 1990. Pienaar later served as a minister in F W de Klerk's government until 1993. He married Isabel Maud van Niekerk on 11 December 1954.