| Year: | 1921 |
| Team: | Washington State Cougars |
| Sport: | football |
| Conference: | Pacific Coast Conference |
| Short Conf: | PCC |
| Record: | 4–2–1 |
| Conf Record: | 2–1–1 |
| Head Coach: | Gus Welch |
| Hc Year: | 3rd |
| Captain: | Earl Dunlap |
| Stadium: | Rogers Field |
The 1921 Washington State Cougars football team was an American football team that represented Washington State College during the 1921 college football season. Head coach Gus Welch led the team to a 2–1–1 mark in the PCC and 4–2–1 overall.[1]