The 1966 Idaho Vandals football team represented the University of Idaho in the 1966 NCAA University Division football season. The Vandals were led by second-year head coach Steve Musseau and played a second season in the Big Sky Conference, but remained in the NCAA University Division. Home games were played on campus at Neale Stadium in Moscow, with one home game in Boise at old Bronco Stadium at Boise Junior College.