2009–10 Horizon League men's basketball standings
	Conf				Overall
Team	W		L	PCT	W		L	PCT
#11 Butler †	18	–	0	1.000	33	–	5	.868
Wright State	12	–	6	.667	20	–	12	.625
Green Bay	11	–	7	.611	22	–	12	.647
Milwaukee	10	–	8	.556	20	–	14	.588
Cleveland State	10	–	8	.556	16	–	17	.485
Valparaiso	10	–	8	.556	15	–	17	.469
Detroit	9	–	9	.500	20	–	14	.588
Loyola (IL)	5	–	13	.278	14	–	16	.467
UIC	3	–	15	.167	8	–	22	.267
Youngstown State	2	–	16	.111	8	–	22	.267

† 2010 Horizon League Tournament winner As of March 18, 2010; Rankings from AP Poll

The 2009–10 Cleveland State Vikings men's basketball team represented Cleveland State University in the 2009-10 NCAA Division I men's basketball season. The team was led by fourth-year head coach Gary Waters and played their home games at the Wolstein Center. They finished the season 16–17, 10–8 in Horizon League play and lost in the quarterfinals of the 2010 Horizon League Men's Basketball Tournament. It was the 79th season of Cleveland State basketball.

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