Frederick Maclean ("Mac") Hewitt (11 July 1908 – 22 November 1976) was an Australian company director and politician.

[1] During the Second World War, Hewitt signed up to the 7th Battalion, Volunteer Defence Corps, as a Gunner part-time and served from 1942 to 1945.

This innovation, much to Hewitt's surprise, led to significant resistance from the trade union movement and the Labor Party.

Bland and imperturbable, with a dry sense of humour, he appears to be completely unmoved by the furore over the strike ballot legislation.

"[4] A quiet and well-performing member of the cabinet, on 4 December 1973 Askin gave Hewitt an additional portfolio as the inaugural Minister for Consumer Affairs, and with Tom Lewis succeeding Askin as Premier, Hewitt was given the new position of Minister for Federal Affairs on 3 January 1975.

[5] He served in these roles through the ministry of Sir Eric Willis until the defeat of the government at the 1976 election, at which point he became the Deputy Leader of the Opposition in the Council.

On his death the new Premier Neville Wran said of Hewitt during his condolence motion in the Legislative Assembly: "He was a down-to-earth man and one who was well regarded, not only within the business world but also within the trade-union movement.