Jack McIntosh Thomson (11 June 1907 – 19 June 1997) was an Australian politician who served as a Country Party member of the Legislative Council of Western Australia from 1950 to 1974, representing South Province.
Thomson boarded at Guildford Grammar School, Perth, and then followed his father into the building trade, eventually becoming a master builder.
Thomson entered parliament at the 1950 Legislative Council election.
He effectively replaced his father in parliament, although a reconstitution meant that they technically represented different constituencies.
Thomson was re-elected three times (in 1956, 1962, and 1968), eventually retiring from parliament at the 1974 state election.