2015 Horizon League men's basketball tournament

First round games were played on the home court of the higher-seeded team.

The second round and semifinals were hosted by Valparaiso, because the Crusaders won the regular season conference championship.

[1] Teams were seeded by 2014–15 Horizon League season record, with a tiebreaker system to seed teams with identical conference records.

First round games at campus sites of higher seeds.

Championship game hosted by highest remaining seed.