The 1991 Iowa State Cyclones football team represented Iowa State University as a member of the Big Eight Conference during the 1991 NCAA Division I-A football season. Led by fifth-year head coach Jim Walden, the Cyclones compiled an overall record of 3âÂÂ7âÂÂ1 with a mark of 1âÂÂ5âÂÂ1 in conference play, placing sixth in the Big 8. Iowa State played home games at Cyclone Stadium in Ames, Iowa.