The 2015 Horizon League softball tournament was held at Oakland Softball Stadium on the campus of Oakland University in Rochester Hills, Michigan from May 6 through May 9, 2015.

The tournament winner earned the Horizon League's automatic bid to the 2015 NCAA Division I softball tournament.

All games were broadcast on ESPN3.

[1] The Horizon League Tournament takes the top 6 teams and places them in a double elimination tournament.

Seeds 1 and 2 get a bye to the 2nd Round.