The 2011 Sun Belt Conference football season was the 11th season of college football play for the Sun Belt Conference. The season began September 1, 2011 and concluded January 8, 2012 as part of the 2011-12 NCAA Division I FBS football season. The 2011 season consisted of nine members: Arkansas State, Florida Atlantic, Florida International, Louisiana–Lafayette, Louisiana–Monroe, Middle Tennessee State, North Texas, Troy and Western Kentucky. The 2011 season was last with nine members as South Alabama became the conference's tenth member for the 2012 season.