The 1919 Washington State Cougars football team represented Washington State College—now known as Washington State University—as a member of the Northwest Conference and the Pacific Coast Conference (PCC) during the 1919 college football season.
Led by first-year head coach Gus Welch, the Cougars compiled an overall record of 5–2.
Washington State had a record of 3–1 in Northwest Conference play and 2–2 against PCC opponents, placing in a three-way tie for third.
This year marked the team's adoption of the "Cougars" nickname.
This college football 1919 season article is a stub.