1989–90 Ohio State Buckeyes men's basketball team

The 1989–90 Ohio State Buckeyes men's basketball team represented Ohio State University as a member of the Big Ten Conference during the 1989–90 NCAA men's college basketball season. The Buckeyes finished with an overall record of 17–13 (10–8 Big Ten) and received an at-large bid to the NCAA tournament. After defeating Providence, 84–83 in OT, in the opening round, Ohio State lost to eventual national champion UNLV, 76–65, in the second round.

Schedule and results
!colspan=9| Regular Season

!colspan=9| NCAA tournament