The 2020–21 Idaho State Bengals men's basketball team represented Idaho State University in the 2020–21 NCAA Division I men's basketball season. The Bengals, led by second-year head coach Ryan Looney, played their home games at Reed Gym in Pocatello, Idaho as members of the Big Sky Conference. They finished the season 13-11, 8-6 in Big Sky Play to finish a tie for 4th place. They lost in the quarterfinals of the Big Sky tournament to Montana State.