The 1966 BYU Cougars football team was an American football team that represented Brigham Young University (BYU) as a member of the Western Athletic Conference (WAC) during the 1966 NCAA University Division football season. In their third season under head coach Tommy Hudspeth, the Cougars compiled an overall record of 8–2 with a mark of 3–2 against conference opponents, tied for second place in the WAC, and outscored opponents by a total of 269 to 163.