The 1971 USC Trojans football team represented the University of Southern California (USC) in the 1971 NCAA University Division football season. In their 12th year under head coach John McKay, the Trojans compiled a 6–4–1 record (3–2–1 against conference opponents), finished in second place in the Pacific-8 Conference (Pac-8), and outscored their opponents by a combined total of 229 to 164. The team was ranked #20 in the final AP Poll.