The Horizon League Baseball Championship is the conference baseball tournament of the NCAA Division I Horizon League. Through the 2025 season, all Horizon League baseball teams participated in the modified double-elimination tournament, which is hosted by the regular season champion of the league. The winner of the tournament receives an automatic berth to the NCAA Division I Baseball Championship.
The following is a list of conference champions and sites listed by year.
The following is a list of conference champions listed by school.