The 2018 Horizon League women's soccer tournament was the postseason women's soccer tournament for the Horizon League.
The quarterfinals of the tournament were held at campus sites, while semifinals and final took place at Engelmann Field in Milwaukee, Wisconsin.
The six team single-elimination tournament consisted of three rounds based on seeding from regular season conference play.
The IUPUI Jaguars were the defending champions, but they did not qualify for the 2018 tournament after finishing the regular season in seventh place.
The Milwaukee Panthers won the tournament by beating the Cleveland State Vikings 1–0 in the final.