| Year: | 1998 |
| Team: | Washington State Cougars |
| Sport: | football |
| Conference: | Pacific-10 Conference |
| Short Conf: | Pac-10 |
| Record: | 3–8 |
| Conf Record: | 0–8 |
| Head Coach: | Mike Price |
| Hc Year: | 10th |
| Off Coach: | Jim McDonell |
| Oc Year: | 5th |
| Off Scheme: | Spread |
| Def Coach: | Bill Doba |
| Dc Year: | 5th |
| Def Scheme: | 4–3 |
| Stadium: | Martin Stadium |
The 1998 Washington State Cougars football team represented Washington State University in the 1998 NCAA Division I-A football season. Head coach Mike Price was in his tenth season, and the team played its home games on campus at Martin Stadium in Pullman, Washington.