The 1980–81 Idaho Vandals men's basketball team represented the University of Idaho during the 1980–81 NCAA Division I men's basketball season. The Vandals were led by third-year head coach Don Monson and played their home games on campus at the Kibbie Dome in Moscow, Idaho. Idaho won its first eleven games (including road wins at Nebraska, Washington State, and Gonzaga), went 23–3 in the regular season, and won the Big Sky Conference regular season championship, their first conference title in 58 years.