The 2009 BYU Cougars football team represented Brigham Young University in the 2009 NCAA Division I FBS football season. The Cougars were led by head coach Bronco Mendenhall and played their home games at LaVell Edwards Stadium. The Cougars finished the season with a record of 11–2, 7–1 in Mountain West play and won the Maaco Bowl Las Vegas 44–20 over Oregon State.