Gerrit Van Niekerk Viljoen (11 September 1926 in Cape Town – 29 March 2009) was a South African government minister and member of the National Party.
He was chair of the Broederbond from 1974 to 1980, Administrator-General of South West Africa from 1979 to 1980, Minister of Education in South Africa from 1980 to 1989, and Minister of Constitutional Development from 1989 to 1992.