William Thomas Gould Hackett (30 May 1906 – 16 July 1983) was a Canadian economist and an economic adviser for the Bank of Montreal.
During World War II he was secretary of the Wartime Industries Control Board.
He was educated at Guelph Collegiate, Ontario, and attended the University of Toronto.
Hackett was author of the 1945 book, A Background of Banking Theory.
Other positions at the bank included: Lecturer in Money & Banking Sir George Williams University 1970–1971 President, University Club of Montreal 1970–1971 During World War II, Hackett was Secretary, Ontario Executive Committee, National War Finance Committee (1941), and Secretary, Wartime Industries Control Board, Ottawa (1941-1943).