John Duncan Anderson AC (born 14 November 1956) is an Australian politician and commentator who served as the 11th Deputy Prime Minister of Australia and leader of the National Party from 1999 to 2005. He was a member of the House of Representatives from 1989 to 2007, serving as Minister for Primary Industries and Energy from 1996 to 1998 and Minister for Transport and Regional Development from 1998 to 2005 in the Howard Government.