Hermon (Herman) Henry Cook (April 26, 1837 – April 12, 1914) was an Ontario lumber merchant and political figure. He represented Simcoe North in the House of Commons of Canada as a Liberal member from 1872 to 1878 and Simcoe East from 1882 to 1891. He also represented Simcoe East in the Legislative Assembly of Ontario as a Liberal member from 1879 to 1882.