The 1975 Washington State Cougars football team was an American football team that represented Washington State University in the Pacific-8 Conference (Pac-8) during the 1975 NCAA Division I football season. In their eighth season under head coach Jim Sweeney, the Cougars compiled a 3–8 record (0–7 in Pac-8, last) and were outscored 295 to 262.