1920–21 Washington State Cougars men's basketball team

The 1920–21 Washington State Cougars men's basketball team represented Washington State College for the 1920–21 college basketball season. Led by thirteenth-year head coach Fred Bohler, the Cougars were members of the Pacific Coast Conference and played their home games on campus in Pullman, Washington.

The Cougars were 12–16 overall in the regular season and 3–11 in conference play, fifth in the standings.