The 2021 BYU Cougars men's volleyball team represented Brigham Young University in the 2021 NCAA Division I & II men's volleyball season. The Cougars, led by sixth year head coach Shawn Olmstead, play their home games at Smith Fieldhouse. The Cougars are members of the MPSF and were picked to win the MPSF in the preseason poll. After finishing last season ranked #1 the Cougars enter the 2021 season with the #1 ranking.