The 2021 season was Loudoun United's third season of existence. The club played in the second tier of American soccer, the USL Championship. There, the club finished with the worst record in USL Championship, with 4–3–25, scoring 31 goals and allowing 78, by far the worst goal differential in the league. Midfielder Ted Ku-DiPietro lead the team with seven goals during the course of the season, and also lead the team with three assists during the 2021 campaign. Jovanny Bolívar finished with six goals during the season, while Samson Sergi finished with three goals. Jermaine Fordah finished the season with two clean sheets.
