1991–92 Washington State Cougars men's basketball team

The 1991–92 Washington State Cougars men's basketball team represented Washington State University for the 1991–92 NCAA Division I men's basketball season. Led by fifth-year head coach Kelvin Sampson, the Cougars were members of the Pacific-10 Conference and played their home games on campus at Beasley Coliseum in Pullman, Washington.

The Cougars were 21–10 overall in the regular season and 9–9 in conference play, tied for fifth in the standings. There was no conference tournament this season; last played in 1990, it resumed in 2002.

For the first time, Washington State played in the National Invitation Tournament, and advanced to the second round.

Postseason results
!colspan=5 style=| National Invitation Tournament