Isaac Erb Bowman (17 August 1832 – 3 September 1897) was an Ontario businessman and political figure. He represented Waterloo North in the House of Commons of Canada as a Liberal member from 1867 to 1878 and from 1887 to 1896. Bowman married Lydia Bowman. He died at Waterloo on 3 September 1897. He is buried at the Calvary United Brethren Cemetery in St. Jacobs. His son Charles Martin Bowman later became a member of the Legislative Assembly of Ontario.