1976–77 Washington State Cougars men's basketball team

The 1976–77 Washington State Cougars men's basketball team represented Washington State University for the 1976–77 NCAA Division I men's basketball season. Led by fifth-year head coach George Raveling, the Cougars were members of the Pacific-8 Conference and played their home games on campus at the Performing Arts Coliseum in Pullman, Washington.

The Cougars were 19–8 overall in the regular season and 8–6 in conference play, tied for third in the standings.