1939 Washington State Cougars football team

The 1939 Washington State Cougars football team was an American football team that represented Washington State College in the Pacific Coast Conference (PCC) during the 1939 college football season. Fourteenth-year head coach Babe Hollingbery led the team to a 4–5 record (3–5 in PCC, sixth); they were outscored 138 to 67, held scoreless three times, and recorded two shutouts.

The Cougars' three home games were played on campus at Rogers Field in Pullman.

Longtime assistant coach Karl Schlademan moved on to Michigan State after this season.

Washington State was ranked at No. 117 (out of 609 teams) in the final Litkenhous Ratings for 1939.