1990 Midwestern Collegiate Conference men's basketball tournament

The 1990 Midwestern Collegiate Conference men's basketball tournament (now known as the Horizon League men's basketball tournament) was held March 8–10 at UD Arena in Dayton, Ohio.

1990 Midwestern Collegiate Conference men's basketball tournament
Classification	Division I
Season	1989–90
Teams	8
Site	UD Arena Dayton, Ohio
Champions	Dayton (1st title)
Winning coach	Jim O'Brien (1st title)
MVP	Negele Knight (Dayton)
Midwestern Collegiate Conference men's basketball tournaments

1989–90 Midwestern Collegiate Conference men's basketball standings

	Conf							Overall
Team	W		L		PCT			W		L		PCT
No. 25 Xavier	12	–	2		.857			28	–	5		.848
Dayton †	10	–	4		.714			22	–	10		.688
Saint Louis	9	–	5		.643			21	–	12		.636
Marquette	9	–	5		.643			15	–	14		.517
Evansville	8	–	6		.571			17	–	15		.531
Loyola (IL)	3	–	11		.214			7	–	22		.241
Detroit	3	–	11		.214			10	–	18		.357
Butler	2	–	12		.143			6	–	22		.214
† 1990 MCC tournament winner Rankings from AP

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.

Bracket

	Quarterfinals Friday, March 8					Semifinals Saturday, March 9					Championship Sunday, March 10
	1	#24 Xavier	86
	8	Butler	61
						1	#24 Xavier	89
						5	Evansville	78
	4	Marquette	57
	5	Evansville	66
											1	#24 Xavier	89
											2	Dayton	98
	3	Saint Louis	58
	6	Loyola-Chicago	67
						6	Loyola-Chicago	95
						2	Dayton	97
	7	Detroit	72
	2	Dayton	90