The 1965 Washington State Cougars football team was an American football team that represented Washington State University in the Athletic Association of Western Universities (AAWU) during the 1965 NCAA University Division football season. In their second season under head coach Bert Clark, the Cougars compiled a 7–3 record (2–1 in AAWU, third), and outscored their opponents 139 to 103. The team's statistical leaders included Tom Roth with 1,257 passing yards, Larry Eilmes with 818 rushing yards, and Doug Flansburg with 578 receiving yards.