The 1991 Delaware Fightin' Blue Hens football team represented the University of Delaware as a member of the Yankee Conference during the 1991 NCAA Division I-AA football season.
Led by 26th-year head coach Tubby Raymond, the Fightin' Blue Hens compiled an overall record of 10–2 with a mark of 7–1 in conference play, sharing the Yankee Conference title with New Hampshire and Villanova.
Delaware advanced to the NCAA Division I-AA Football Championship playoffs, where Fightin' Blue Hens lost in the first round to James Madison.
The team played home games at Delaware Stadium in Newark, Delaware.
[13] Roster