| Sport: | basketball |
| Year: | 1989–90 |
| Team: | Missouri Tigers |
| Conference: | Big Eight Conference |
| Short Conf: | Big 8 |
| Coachrank: | 11 |
| Aprank: | 11 |
| Record: | 26–6 |
| Conf Record: | 12–2 |
| Head Coach: | Norm Stewart |
| Hc Year: | 23rd |
| Asst Coach1: | Bob Sundvold |
| Ac1 Year: | 12th |
| Arena: | Hearnes Center |
| Champion: | Maui Invitational champions Big Eight Regular Season Champions |
| Tourney: | NCAA tournament |
| Tourney Result: | first round |
The 1989–90 Missouri Tigers men's basketball team represented the University of Missouri as a member of the Big Eight Conference during the 1989–90 NCAA men's basketball season. Led by head coach Norm Stewart, the Tigers won the Big Eight regular season title and were the No. 1 ranked team in the country before an upset by Colorado in the Big Eight Conference Tourney and a stunning loss to 14-seed Northern Iowa in the first round of the NCAA Tourney NCAA tournament.[1] The Tigers finished with an overall record of 26–6 (12–2 Big Eight).
|-!colspan=9 style=| Regular season|-!colspan=9| Big Eight Conference tournament|-!colspan=9| NCAA tournament