1931 Arizona State–Flagstaff Lumberjacks football team

The 1931 Arizona State–Flagstaff Lumberjacks football team was an American football team that represented Arizona State Teachers College at Flagstaff (now known as Northern Arizona University) in the Border Conference during the 1931 college football season. In their fifrth year under head coach Rudy Lavik, the Lumberjacks compiled a 3–5 record.