Pierre H. Cadieux PC (born April 6, 1948) is a lawyer and former Canadian politician. Born in Hudson, Quebec, Cadieux was first elected to the House of Commons of Canada as the Progressive Conservative Member of Parliament for Vaudreuil, Quebec in the 1984 federal election that brought Brian Mulroney to power. Cadieux left Cabinet when Mulroney retired as prime minister, and did not run in the 1993 federal election.