The 1948 Washington State Cougars football team was an American football team that represented Washington State College during the 1948 college football season.

Fourth-year head coach Phil Sarboe led the team to a 4–3–1 mark in the Pacific Coast Conference (PCC) and 4–5–1 overall.

64 in the final Litkenhous Difference by Score System ratings for 1948.

[2] The Cougars' had four home games on campus in Pullman at Rogers Field, with the season finale in Tacoma.

This college football 1940s season article is a stub.