1945 Arizona State–Flagstaff Lumberjacks football team

The 1945 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 1945 college football season. In their third year under head coach Frank Brickey, the Lumberjacks compiled a 2–3 record and were outscored by a total of 86 to 64.

The team played its home games at Skidmore Field in Flagstaff, Arizona.