1990–91 Washington Huskies men's basketball team

The 1990–91 Washington Huskies men's basketball team represented the University of Washington for the 1990–91 NCAA Division I men's basketball season. Led by second-year head coach Lynn Nance, 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 14–14 overall in the regular season and 5–13 in conference play, last in the standings. Two notable wins were upsets of ranked opponents at Hec Ed: #4 Arizona in early January, and #16 UCLA two months later.

There was no conference tournament this season; last played in 1990, it resumed in 2002.