The 2020–21 Southern Utah Thunderbirds men's basketball team represented Southern Utah University in the 2020–21 NCAA Division I men's basketball season.

The Thunderbirds, led by 5th-year head coach Todd Simon, played their home games at the America First Event Center in Cedar City, Utah as members of the Big Sky Conference.

They defeated Northern Colorado in the quarterfinals of the Big Sky tournament before losing in the semifinals to Montana State.

[1] They were scheduled to face off against the #2 seed Northern Colorado in the quarterfinals, but the remainder of the tournament was cancelled due to the ongoing COVID-19 pandemic.

[2] Roster Last update: December 9, 2020 Source[3]