Maurice Donald Williamson (born 6 March 1951) is a New Zealand diplomat and former politician who represented Pakuranga in the House of Representatives as a member of the National Party. He held several ministerial portfolios both inside and outside the cabinet: Transport, Communications, Broadcasting, Local Government, Research Science and Technology, Building and Construction, Customs, Small Business, Statistics and Land Information. He later entered local politics, and since October 2022 has been an Auckland councillor for Howick.