The 2012–13 Washington State Cougars men's basketball team represented Washington State University during the 2012–13 NCAA Division I men's basketball season.

The Cougars played their home games on Jack Friel Court at Beasley Coliseum in Pullman, Washington and were members of the Pac-12 Conference.

They were led by fourth year head coach Ken Bone.

They finished the season with a record of 13–19 overall, 4–14 in Pac-12 play to finish in a last place tie with Oregon State.

They lost in the first round of the Pac-12 tournament to in-state rival Washington.