The 1991 Fresno State Bulldogs football team represented California State University, Fresno as a member of the Big West Conference during the 1991 NCAA Division I-A football season.
Led by 14th-year head coach Jim Sweeney, Fresno State compiled an overall record of 10–2 with a mark of 6–1 in conference play, sharing the Big West title with San Jose State.
Fresno State earned NCAA Division I-A postseason bowl game berth in 1991.
In the fourth game of the season, Fresno State scored a school record 94 points against the New Mexico, including 66 in the first half.
Both of those marks are school records that still stand as of the end of the 2021 season.