Loudoun United FC is an American professional soccer team based in Leesburg, Virginia. The team was founded in 2018 as the reserve team of D.C. United and made its debut in the USL Championship in 2019.
On July 18, 2018, the team was officially announced by USL and D.C. United as were the team's name, colors and crest. Loudoun United FC replaced Richmond Kickers as D.C. United's USL affiliate.
The club plays at Segra Field, a new 5,000-seat stadium at Philip A. Bolen Memorial Park in Leesburg. The stadium was built by D.C. United and the county government for $15 million. Construction began in 2018, and was completed in August 2019. After playing some initial home games at Audi Field, they debuted in their new stadium in a game against the Charlotte Independence that ended 3–3 in front of 5,015 spectators.