1989–90 Gonzaga Bulldogs men's basketball team

The 1989–90 Gonzaga Bulldogs men's basketball team represented Gonzaga University in the West Coast Conference (WCC) during the 1989–90 NCAA Division I men's basketball season. Led by eighth-year head coach Dan Fitzgerald, the Bulldogs were .290 overall in the regular season (3–11 in WCC, last), and played their home games on campus at the Charlotte Y. Martin Centre (formerly known as Kennedy Pavilion) in Spokane, Washington.

At the fourth conference tournament, the Zags lost again in the quarterfinals, to top seed Loyola Marymount, to finish at .280. Their first tournament wins came two years later in 1992; they advanced to the final, but fell by three to top-seeded Pepperdine.

Postseason results
!colspan=6 style=| WCC tournament