| Mode: | football |
| Year: | 2003 |
| Team: | BYU Cougars |
| Conference: | Mountain West Conference |
| Short Conf: | MW |
| Record: | 4–8 |
| Conf Record: | 3–4 |
| Head Coach: | Gary Crowton |
| Hc Year: | 3rd |
| Cooff Coach1: | Robbie Bosco |
| Cooc1 Year: | 1st |
| Cooff Coach2: | Todd Bradford |
| Cooc2 Year: | 1st |
| Def Coach: | Bronco Mendenhall |
| Dc Year: | 1st |
| Off Scheme: | Spread |
| Def Scheme: | 3–3–5 |
| Stadium: | LaVell Edwards Stadium |
The 2003 BYU Cougars football team represented Brigham Young University during the 2003 NCAA Division I-A football season.
•SportsWest Productions (SWP) games were shown locally on KSL 5.
The BYU Cougars radio network carried every game on radio using the broadcast trio of Greg Wrubell (pxp), Marc Lyons (analyst), and Bill Riley (sidelines). KSL 1160 AM served as the flagship station for BYU Football.