2023–24 Washington State Cougars men's basketball team

The 2023–24 Washington State Cougars men's basketball team represented Washington State University during the 2023–24 NCAA Division I men's basketball season. The team were led by head coach Kyle Smith in his 5th and final season for the Cougars. The Cougars played their home games at the Beasley Coliseum in Pullman, Washington, as members in the Pac-12 Conference. They finished the season 25–10, 14–6 in Pac-12 play to finish in second place. They defeated Stanford in the quarterfinals of the Pac-12 tournament before losing to Colorado in the semifinals. They received an at-large bid to the NCAA tournament as the No. 7 seed in the East region. There they beat Drake in the first round before losing to Iowa State in the second round.

The season marked the final season of the Pac-12 conference as the conference dissolved after the majority of Pac-12 schools left the conference to join other conferences. They will play in the West Coast Conference as an affiliate member for the next two years.

On February 19, 2024, the Cougars returned to the AP Poll for the first time since the 2007–08 season.

Previous season
The Cougars finished the 2022–23 season 16–15, 11–9 in Pac-12 play to finish in a tie for fifth place. They defeated California in the first round of the Pac-12 tournament before losing to Oregon in the second round. They received an invitation to participate in the NIT, where they were defeated by Eastern Washington in the first round.

Schedule and results
!colspan=9 style=| Non-conference regular season

!colspan=9 style=| Pac-12 regular season

!colspan=9 style=| Pac-12 Tournament

!colspan=12 style=| NCAA tournament

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