John Hearn (4 January 1827 – 17 May 1894) was an Irish-born businessman and political figure in Quebec. He represented Quebec West in the Legislative Assembly of Quebec from 1867 to 1877, Stadacona division in the Legislative Council of Quebec from 1877 to 1892 and Quebec West in the House of Commons of Canada from 1892 to 1894 as a Conservative member. Hearn was also a director for the St. Lawrence and Témiscouata Railway Company and the Great Northern Railway Company. His son John Gabriel Hearn also served as a member of the Quebec assembly.