Loudoun County | |
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![]() Loudoun County Courthouse and a World War II monument (right) in Leesburg, February 2021 | |
Motto: "I Byde My Time"[1] | |
![]() Location within the U.S. state of Virginia | |
![]() Virginia's location within the U.S. | |
Coordinates: 39°05′N 77°38′W / 39.09°N 77.64°W | |
Country | ![]() |
State | ![]() |
Founded | 1757 |
Named for | John Campbell, 4th Earl of Loudoun[2] |
Seat | Leesburg |
Largest town | Leesburg |
Area | |
• Total | 521.33 sq mi (1,350.2 km2) |
• Land | 515.74 sq mi (1,335.8 km2) |
• Water | 5.6 sq mi (15 km2) 1.1% |
Population (2020) | |
• Total | 420,959 ![]() |
• Density | 810/sq mi (310/km2) |
Time zone | UTC−5 (Eastern) |
• Summer (DST) | UTC−4 (EDT) |
Congressional district | 10th |
Website | www |
Loudoun County (/ˈlaʊdən/) is in the northern part of the Commonwealth of Virginia in the United States. In 2020, the census returned a population of 420,959,[3] making it Virginia's third-most populous county. The county seat is Leesburg.[4] Loudoun County is part of the Washington–Arlington–Alexandria, DC–VA–MD–WV Metropolitan Statistical Area.
As of 2023, Loudoun County had a median household income of $156,821,[5] the highest of any county in the nation.[6]
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