The 1991 Arizona Wildcats football team represented the University of Arizona in the Pacific-10 Conference (Pac-10) during the 1991 NCAA Division I-A football season. In their fifth season under head coach Dick Tomey, the Wildcats compiled a 4–7 record (3–5 against Pac-10 opponents), finished in a tie for sixth place in the Pac-10, and were outscored by their opponents, 361 to 248. The team played its home games in Arizona Stadium in Tucson, Arizona.