| Year: | 2004 |
| Team: | Northwestern State Demons |
| Sport: | football |
| Conference: | Southland Conference |
| Short Conf: | Southland |
| Tsnrank: | 17 |
| Record: | 8–4 |
| Conf Record: | 4–1 |
| Head Coach: | Scott Stoker |
| Hc Year: | 3rd |
| Def Coach: | Brad Laird |
| Dc Year: | 2nd |
| Stadium: | Harry Turpin Stadium |
| Champion: | Southland co-champion |
| Bowl: | NCAA Division I-AA First Round |
| Bowl Result: | L 7–56 vs. Montana |
The 2004 Northwestern State Demons football team represented Northwestern State University as a member of the Southland Conference during the 2004 NCAA Division I-AA football season. Led by third-year head coach Scott Stoker, the Demons compiled an overall record of 8–4 with a mark of 4–1 in conference play, and finished as Southland co-champion with Sam Houston State. Northwestern advanced to the Division I-AA playoffs before losing to Montana. Northwestern State played home games at Harry Turpin Stadium in Natchitoches, Louisiana.