The 2020–21 George Mason Patriots Men's basketball team represented George Mason University during the 2020–21 NCAA Division I men's basketball season. The season marked the 55th for the program, the sixth under head coach Dave Paulsen, and the eighth as members of the Atlantic 10 Conference. The Patriots played their home games at EagleBank Arena in Fairfax, Virginia. The Patriots finished the season 13–9, 8–6 in A-10 play to finish in sixth place. They defeated George Washington in the second round of the A-10 tournament before losing to Davidson in the quarterfinals.