| Year: | 2003 |
| Team: | Louisiana–Lafayette Ragin' Cajuns |
| Sport: | football |
| Conference: | Sun Belt Conference |
| Short Conf: | Sun Belt |
| Record: | 4–8 |
| Conf Record: | 4–3 |
| Head Coach: | Rickey Bustle |
| Hc Year: | 2nd |
| Off Coach: | Rob Christophel |
| Oc Year: | 2nd |
| Dc Year: | 2nd |
| Stadium: | Cajun Field |
The 2003 Louisiana–Lafayette Ragin' Cajuns football team represented the University of Louisiana at Lafayette as a member of the Sun Belt Conference in the 2003 NCAA Division I-A football season. They were led by second-year head coach Rickey Bustle and played their home games at Cajun Field in Lafayette, Louisiana.