Henry John Brewis (8 April 1920 – 25 May 1989) was a Scottish Unionist Party politician and barrister. He was elected as the Member of Parliament (MP) for Galloway at a by-election in April 1959, after the death of the Unionist MP John Mackie. He was re-elected at the general election in October 1959, and held the seat until he stood down at the October 1974 general election. He was also a Member of the European Parliament from 1973 to 1975. He was Deputy Lieutenant of Wigtown from 24 January 1966 and Lord Lieutenant from 18 September 1981