The 2015–16 Washington State Cougars men's basketball team represented Washington State University during the 2015–16 NCAA Division I men's basketball season.

This was Ernie Kent's second year as head coach at Washington State.

The Cougars played their home games at the Beasley Coliseum as members of the Pac-12 Conference.

The 2014–15 Cougars finished the season with an overall record of 13–18, and 7–11 in conference play.

[1] Sources: Roster Washington State's non-conference will include a trip to the Diamond Head Classic in Hawaii, where they will play three of the following: Auburn, BYU, Harvard, New Mexico, Northern Iowa, Oklahoma, and host-Hawaii.