The 2003 Northern Iowa Panthers football team represented the University of Northern Iowa as a member of the Gateway Football Conference during the 2003 NCAA Division I-AA football season.
Led by third-year head coach Mark Farley, the Panthers compiled an overall record of 10–3 with a mark of 6–1 in conference play, winning the Gateway title.
Northern Iowa advanced to the NCAA Division I-AA Football Championship playoffs, where they beat Montana State in the first round before falling to eventual national champion Delaware in the quarterfinals.
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