John Herbert "Jack" Heinrich, (born December 20, 1936) was a commercial and real estate lawyer and political figure in British Columbia. He represented Prince George North in the Legislative Assembly of British Columbia from 1979 to 1986 as a Social Credit member.
He was born in Mission, British Columbia and was educated there and at the University of British Columbia. In 1962, he married Linda Strachan. Heinrich lived in Prince George. He served in the provincial cabinet as Minister of Labour, Minister of Municipal Affairs, Minister of Education and Minister of Forests. In 1986, he was named Queen's Counsel.