| Year: | 2005 |
| Team: | Utah State Aggies |
| Sport: | football |
| Conference: | Western Athletic Conference |
| Short Conf: | WAC |
| Record: | 3–8 |
| Conf Record: | 2–6 |
| Head Coach: | Brent Guy |
| Hc Year: | 1st |
| Off Coach: | Mike Santiago |
| Oc Year: | 1st |
| Def Coach: | Mark Johnson |
| Dc Year: | 1st |
| Stadium: | Romney Stadium |
The 2005 Utah State Aggies football team represented Utah State University as a member of the Western Athletic Conference (WAC) in 2005 NCAA Division I-A football season. The Aggies were led by first-year head coach Brent Guy and played their home games in Romney Stadium in Logan, Utah.[1] The Aggies finished the season 3–8 overall and 2–6 in WAC play to tie for sixth place.