1990 Missouri Valley Conference men's basketball tournament

The 1990 Missouri Valley Conference men's basketball tournament was played after the conclusion of the 1989–1990 regular season at Redbird Arena on the campus of Illinois State University in Normal, Illinois.

The Illinois State Redbirds defeated the in the championship game, 81-78, and as a result won their 2nd MVC Tournament title and earned an automatic bid to the 1990 NCAA tournament.

It was also the final MVC tournament played on a campus site, before moving the entire event to St. Louis the following season.