1978–79 Washington State Cougars men's basketball team

The 1978–79 Washington State Cougars men's basketball team represented Washington State University for the 1978–79 NCAA Division I men's basketball season. Led by seventh-year head coach George Raveling, the Cougars were members of the Pacific-10 Conference and played their home games on campus at the Performing Arts Coliseum in Pullman, Washington.

The Cougars were 18–9 overall in the regular season and 10–8 in conference play, tied for fourth in the standings. A late season loss at Arizona likely kept them out of the NIT.