1978 Washington State Cougars football team

Under new head coach Jim Walden, the Cougars compiled a 4–6–1 record (2–6 in Pac-10, last), and were outscored 296 to 276.

[3] This was the first football season in the newly expanded Pac-10; the Cougars met the two new members, Arizona and Arizona State, but did not play the USC Trojans.

Senior quarterback Thompson was ninth in the balloting for the Heisman Trophy, and was the third overall selection of the 1979 NFL draft, taken by the Cincinnati Bengals.

[4] The offensive backs coach in 1977 under Warren Powers, Walden was promoted that December and became the Cougars' fourth head coach in four seasons (Jim Sweeney (1975), Jackie Sherrill (1976), and Powers).

After this season, the running track in Martin Stadium was removed, the playing field was lowered, and the capacity was expanded with new lower seating.