1921 Cornell Big Red football team

The 1921 Cornell Big Red football team represented Cornell University in the 1921 college football season. The team finished with an 8–0 record, outscored its opponents 392 to 21, including a 110–0 win over Western Reserve on October 15, and was retroactively named as the 1921 national champion by the Helms Athletic Foundation, Houlgate System, and National Championship Foundation, and as a co-national champion by Parke H. Davis.