The 2020 Saint Louis FC season was the club's sixth and final season of existence, and their sixth consecutive season in the USL Championship, the second tier of American soccer. Saint Louis additionally competed in the U.S. Open Cup. This article covers the period from November 18, 2019, the day after the 2019 USL-C Playoff Final, to the conclusion of the 2020 USL-C Playoff Final, scheduled for November 12–16, 2020.