The 1931 SMU Mustangs football team represented Southern Methodist University (SMU) as a member the Southwest Conference (SWC) during the 1931 college football season. Led by 12th head coach Ray Morrison, the Mustangs compiled and overall record of 9âÂÂ1âÂÂ1 with a mark of 5âÂÂ0âÂÂ1 in conference play, and finished as SWC champion.