The 2020–21 Oregon State Beavers men's basketball team represented Oregon State University in the 2020–21 NCAA Division I men's basketball season. The Beavers were led by seventh-year head coach Wayne Tinkle, and played their home games at Gill Coliseum in Corvallis, Oregon as members of the Pac-12 Conference. Facing the 2-seed Houston Cougars in the Midwest regional final, the Beavers rallied from a 17-point second half deficit to tie the game with under four minutes remaining. Houston would prevail, 67–61, to end Oregon State's Cinderella run.