Judd Buchanan, (born 25 July 1929) is a Canadian politician and businessman. He was a Member of Parliament (MP) in the House of Commons of Canada between 1968 and 1980. He represented the electoral area of London West in Ontario. During this time, he was a part of the Liberal Party. Buchanan was a part of the cabinet of Canada while Pierre Trudeau was the Prime Minister. From 1974 to 1976, he was the Minister of Indian Affairs, from 1976 to 1978 he was the Minister of Public Works and the Minister of State for Science and Technology. He was the President of the Treasury Board from 1978 to 1979.