John Charles Kerin AO, FTSE (born 21 November 1937) is an Australian economist and former Labor Party politician who served in the House of Representatives from 1972 to 1975 and again from 1978 to 1993. He held a number of senior ministerial roles in both the Hawke and Keating Governments, including six months as Treasurer of Australia and eight years as Minister for Primary Industries and Energy, holding the latter role for the longest period in Australian history.