| Sport: | Basketball |
| Year: | 1989–90 |
| Prev Year: | 1988–89 |
| Next Year: | 1990–91 |
| Team: | Ohio State Buckeyes |
| Conference: | Big Ten |
| Short Conf: | Big Ten |
| Record: | 17–13 |
| Conf Record: | 10–8 |
| Hc Year: | 1st |
| Bowl Result: | second round |
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.
|-!colspan=9| Regular Season
|-!colspan=9| NCAA tournament[1] [2]