Jan Christiaan Heunis (1927–2006) was a South African Afrikaner lawyer, politician, member of the National Party and former minister in the governments of John Vorster and P.W. Botha.

Chris Heunis was born in 1927 in Uniondale in the Cape Province (now the Western Cape. After studying in George, he continued his studies in law and became a lawyer in 1951. At the same time, he pursued a political career and became head of the National Party in George District and a member of the municipal council. In 1959, he was elected to the Provincial Council.

Heunis was elected to the House of Assembly in 1970, and in 1974 became Minister of Indian Affairs and Tourism in the government of John Vorster. In 1975, he became Minister of Economic Affairs. In 1979, as part of the P W Botha Government, he participated in the preparation of a new constitution, and in 1982, became Minister of Constitutional Reform. In this role, he put in place the Tricameral Parliament, gave the right to vote to the Coloureds and Indians, in separate chambers of the South African Parliament. He convinced the leader of the Labour Party, Allan Hendrickse, to agree to this reform.