| Year: | 1991 |
| Team: | BYU Cougars |
| Sport: | football |
| Conference: | Western Athletic Conference |
| Short Conf: | WAC |
| Coachrank: | 23 |
| Aprank: | 23 |
| Record: | 8–3–2 |
| Conf Record: | 7–0–1 |
| Head Coach: | LaVell Edwards |
| Hc Year: | 20th |
| Off Coach: | Roger French |
| Oc Year: | 11th |
| Off Scheme: | West Coast |
| Def Coach: | Ken Schmidt |
| Dc Year: | 1st |
| Def Scheme: | 4–3 |
| Stadium: | Cougar Stadium |
| Champion: | WAC champion |
| Bowl: | Holiday Bowl |
| Bowl Result: | T 13–13 vs. Iowa |
The 1991 BYU Cougars football team represented Brigham Young University as a member of the Western Athletic Conference (WAC) during the 1991 NCAA Division I-A football season. Led by 20th-year head coach LaVell Edwards, the Cougars compiled a record of 8–3–2 overall and 7–0–1 in conference play, winning the WAC title for the third consecutive season. BYU was invited to the Holiday Bowl, where the Cougars tied Iowa.
See also: 1991 Florida State Seminoles football team and Pigskin Classic.
See also: 1991 UCLA Bruins football team.
See also: 1991 Penn State Nittany Lions football team.
See main article: 1991 Holiday Bowl.
See also: 1991 Iowa Hawkeyes football team.
See main article: 1992 NFL draft. [2]
| 9 | 230 | Ty Detmer | Quarterback | Green Bay Packers |