Sir John Charles Moir Mason KCMG (13 May 1927 – 16 March 2008) was a British diplomat with Her Majesty's Diplomatic Service. He was the British Ambassador to Israel from 1976 to 1980, and then High Commissioner to Australia from 1980 to 1984. At the end of his term, he and his wife remained in Australia where they became citizens in 1987, and Mason worked as a business executive.[1]