| Year: | 2015 |
| Conference: | Horizon League |
| Division: | I |
| Gender: | Men's |
| Teams: | 8 |
| 1Stroundarena: | Campus sites |
| Semiarena: | Athletics–Recreation Center |
| Semicity: | Valparaiso, Indiana |
| Finalarena: | Athletics–Recreation Center |
| Finalcity: | Valparaiso, Indiana |
| Champions: | Valparaiso |
| Titlecount: | 2nd |
| Coach: | Bryce Drew |
| Coachcount: | 2nd |
| Mvp: | Alec Peters |
| Mvpteam: | Valparaiso |
| Television: | ESPN3, ESPNU, ESPN |
The 2015 Horizon League men's basketball tournament began on March 3, 2015, with the championship game on Tuesday, March 10. 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. Since Valparaiso won its semifinal game, it also hosted the championship game. Only eight of the nine teams in the conference played in the Horizon League Tournament, as Milwaukee has been deemed ineligible for postseason play for the 2014–15 season.[1]
Teams were seeded by 2014–15 Horizon League season record, with a tiebreaker system to seed teams with identical conference records. The top two teams received a bye to the semifinals and the third and fourth seeds received byes to the quarterfinals.
The tiebreaking system is as follows:[2]
| Seed | Team | Record | Tiebreaker | ||
|---|---|---|---|---|---|
| align=center | 1 | Valparaiso | align=center | 13–3 | |
| align=center | 2 | Green Bay | align=center | 12–4 | |
| align=center | 3 | Oakland | align=center | 11–5 | 1–1 vs CSU, 1–1 vs. VU |
| align=center | 4 | Cleveland State | align=center | 11–5 | 1–1 vs OU, 0–2 vs. VU |
| align=center | 5 | Detroit | align=center | 7–9 | |
| align=center | 6 | UIC | align=center | 4–12 | |
| 7 | Wright State | 3-13 | |||
| 8 | Youngstown State | 2-14 |
| Game | Time | Matchup | Television | |
|---|---|---|---|---|
| First round – Tuesday, March 3 | ||||
| align=center | 1 | 7:00 pm | Youngstown State 67 at Detroit 77 | ESPN3 |
| align=center | 2 | 7:00 pm | Wright State 57 at UIC 60 | ESPN3 |
| Quarterfinals – Friday, March 6 (at Valparaiso) | ||||
| align=center | 3 | 7:00 pm | Oakland 69 vs. UIC 72 | ESPN3 |
| align=center | 4 | 9:30 pm | Cleveland State 70 vs. Detroit 53 | ESPN3 |
| Semifinals – Saturday, March 7 (at Valparaiso) | ||||
| align=center | 5 | 7:00 pm | Green Bay 70 vs. UIC 56 | ESPNU |
| align=center | 6 | 9:30 pm | Cleveland State 55 at Valparaiso 60 | |
| Championship – Tuesday, March 10 (at Valparaiso) | ||||
| align=center | 7 | 7:00 pm | Green Bay 44 at Valparaiso 54 | ESPN |
| All game times in Eastern Time Zone. * Tape delayed on ESPNU at 11:30 pm EST. | ||||
[3] First round games at campus sites of higher seeds.
Second round and semifinals hosted by No. 1 seed.
Championship game hosted by highest remaining seed.