1989–90 Xavier Musketeers men's basketball team

The 1989–90 Xavier Musketeers men's basketball team represented Xavier University from Cincinnati, Ohio in the 1989–90 season. Led by head coach Pete Gillen, the Musketeers finished with a 28–5 record (12–2 MCC), won the MCC regular season title, and received an at-large bid to the NCAA tournament as the #6 seed in the Midwest region. In the NCAA tournament, the Musketeers defeated Kansas State and Georgetown to reach the Sweet Sixteen. Xavier lost to Texas in the Midwest regional semifinals – a game that was played in Dallas, Texas.

Schedule and results
!colspan=9 style=| Regular season

!colspan=9 style=| Midwestern Collegiate Conference Tournament

!colspan=9 style=| NCAA Tournament