1988–89 Washington Huskies men's basketball team

The 1988–89 Washington Huskies men's basketball team represented the University of Washington for the 1988–89 NCAA Division I men's basketball season. Led by fourth-year head coach Andy Russo, the Huskies were members of the Pacific-10 Conference and played their home games on campus at Hec Edmundson Pavilion in Seattle, Washington.

The Huskies were 12–15 overall in the regular season and 8–10 in conference play, sixth in the standings. In the Pac-10 tournament in southern California at The Forum, Washington lost to third seed UCLA by ten points in the quarterfinal.

Russo resigned less than two weeks later, and was succeeded by alumnus Lynn Nance, the head coach at Saint Mary's. The Gaels were WCAC champions, received an at-large berth in the NCAA tournament, and finished at 25–4 in 1989.

This season's Final Four was held in Seattle at the Kingdome.

Postseason results
!colspan=5 style=| Pacific-10 Tournament