| Year: | 1983 |
| Team: | BYU Cougars |
| Sport: | football |
| Conference: | Western Athletic Conference |
| Short Conf: | WAC |
| Coachrank: | 7 |
| Aprank: | 7 |
| Record: | 11–1 |
| Conf Record: | 7–0 |
| Head Coach: | LaVell Edwards |
| Hc Year: | 12th |
| Off Coach: | Roger French |
| Oc Year: | 3rd |
| Off Scheme: | West Coast |
| Def Coach: | Dick Felt |
| Dc Year: | 9th |
| Def Scheme: | 3–4 |
| Stadium: | Cougar Stadium |
| Champion: | WAC champion Holiday Bowl champion |
| Bowl: | Holiday Bowl |
| Bowl Result: | W 21–17 vs. Missouri |
The 1983 BYU Cougars football team represented the Brigham Young University (BYU) in the 1983 NCAA Division I-A football season as a member of the Western Athletic Conference (WAC). The team was led by head coach LaVell Edwards, in his twelfth year, and played their home games at Cougar Stadium in Provo, Utah. They finished the season with a record of eleven wins and one loss (11–1, 7–0 WAC), and with a victory over Missouri in the Holiday Bowl. The Cougars offense scored 505 points while the defense allowed 247 points.
The following were selected in the 1984 NFL draft.
| Player | Position | Round | Overall | NFL Team |
| Todd Shell | Linebacker | 1 | 24 | San Francisco 49ers |
| Kirk Pendleton | Wide receiver | 11 | 304 | Atlanta Falcons |
The following were selected in the 1984 NFL Supplemental Draft.
| Player | Position | Round | Overall | NFL Team |
| Steve Young | Quarterback | 1 | 1 | Tampa Bay Buccaneers |
| Tight end | 1 | 22 | Seattle Seahawks | |
Consensus All-American, first-team All-WAC[3]
Second-team All-WAC[3]
Second-team All-WAC[3]
Honorable mention All-American, first-team All-WAC[3]
Honorable mention All-American,[4] first-team All-WAC[3]
Sammy Baugh Trophy, Davey O'Brien Award,[5] consensus All-American,[6] first-team All-WAC[3]