The 2020–21 Utah State Aggies men's basketball team represented Utah State University in the 2020–21 NCAA Division I men's basketball season. The Aggies, led by third-year head coach Craig Smith, played their home games at the Smith Spectrum in Logan, Utah as members of the Mountain West Conference. They finished the season 20–9, 15–4 in Mountain West play to finish in second place. In the Mountain West tournament, they defeated UNLV and Colorado State before losing to San Diego State in the championship game. They received an at-large bid to the NCAA tournament as the No. 11 seed in the South region, where they lost to Texas Tech in the first round.