The 1989–90 Boise State Broncos men's basketball team represented Boise State University during the 1989–90 NCAA Division I men's basketball season.

The Broncos were led by seventh-year head coach Bobby Dye and played their home games on campus at the BSU Pavilion in Boise, Idaho.

They finished the regular season at 12–15 overall, with a 7–9 record in the Big Sky Conference, seventh in the standings.

[1] The conference tournament was at home in Boise, but the Broncos did not qualify for the six-team field.

[2] It remains the only time in the tourney's history that the host did not play; it moved to neutral sites beginning in 2016.