The 1998–99 Washington Huskies men's basketball team represented the University of Washington for the 1998–99 NCAA Division I men's basketball season.

Led by sixth-year head coach Bob Bender, 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 17–11 overall in the regular season and 10–8 in conference play, fourth in the standings.

Washington made the NCAA tournament for the second straight year.

Built over seventy years earlier in 1927,[7] Hec Edmundson Pavilion underwent a renovation following this season and reopened in November 2000.