1931 Mount St. Charles Fighting Saints football team

The 1931 Mount St. Charles Fighting Saints football team represented Mount St. Charles College (later renamed Carroll College) as an independent during the 1931 college football season. In their first year under head coach Bill Jones, the team compiled a perfect 6–0 record and outscored opponents by a total of 192 to 0.

The 1931 season was the first perfect season in Carroll College football history, a feat later accomplished by the 1973, 2003, 2005, and 2007, and 2010 teams.