The 2007 BYU Cougars football team represented Brigham Young University (BYU) in the 2007 NCAA Division I FBS football season. BYU clinched its second consecutive Mountain West Conference (MWC) championship title outright after defeating Utah on November 24. It was BYU's second consecutive, undefeated season in the MWC, its fourth MWC championship since the league began in 1999, and its 23rd conference title. At the beginning of the season the Cougars had won an MWC record 16 straight league games dating back to 2005 and were on a ten-game overall winning streak, the longest winning streak in the country at the time. The Cougars began the season with the second longest winning streak in the country at 11 wins until their loss to UCLA in the second regular season game. The Cougars ended this season ranked 14th in the nation, highest of all schools from non-AQ conferences. This finish was the highest back-to-back rankings in the AP Poll since the Cougars won the national championship in 1984.

The 2007 NCAA Division I FBS football season was the highest level of college football competition in the United States organized by the National Collegiate Athletic Association (NCAA).