Donald Frank "Don" Mazankowski, (born July 27, 1935) is a Canadian politician who served as a cabinet minister under Prime Ministers Joe Clark and Brian Mulroney.
He was also deputy prime minister under Mulroney.
He is currently a consultant with the law firm Gowling Lafleur Henderson LLP.
He also serves as a director or trustee for a number of companies, including Weyerhaeuser Co., ATCO Ltd., Shaw Communications Inc., and Power Corporation of Canada.