Dayton defeated Xavier in the championship game, 85–78. The win, on Dayton's home court, denied the Musketeers a fifth consecutive MCC/Horizon League men's basketball tournament title. It was Dayton's first MCC/Horizon League tourney title.
The Flyers received an automatic bid to the 1990 NCAA tournament as the #12 seed in the Midwest region. Xavier, the regular season conference champions, received an at-large bid as the #6 seed in the Midwest region.
Format
All eight conference members participated in the tournament and were seeded based on regular season conference records.