Loudoun County is a county located in the U.S. state of Virginia. As of the 2010 census, the population was 312,311 and a population density of 231 people per km². After 10 years in 2020 county had an estimated population of 422,784 inhabitants. Its county seat is Leesburg. The county was created 269 years ago in 1756.Location of Loudoun County on Virginia map.
Quick Facts about Loudoun County
Population :
422,784 (2020)
Country :
United States of America
State :
Virginia (United States)
Twitter username :
loudouncogovt
Area :
1350 km2
Water as percent of area :
1.1%
Land as percent of area :
98.9%
Legislative body :
Loudoun County Board of Supervisors
Named for :
John Campbell, 4th Earl of Loudoun
Altitude :
715 feet / 218 meters
Capital :
Leesburg
Establishment :
January 01, 1757
Time Zone :
America/New_York
Local time :
01:13:23 (23rd February 2026)
Density :
313 Pop. per km² as of 2020
Population growth :
26.13% (2010-2020)
Loudoun County Courthouse in Leesburg VirginiaLoudoun County Courthouse in Leesburg Virginia image
Geography
Loudoun County is located at 39°5'26"N 77°38'9"W (39.0906800, -77.6357200). It has 8 neighbors: Frederick County, Montgomery County, Washington County, Clarke County, Fairfax County, Fauquier County, Prince William County and Jefferson County.
Loudoun County map
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Loudoun County Populated Places
Cities, towns, neighborhoods & other populated places in Loudoun County.
City Name
Population
Title
Leesburg
54,488
Historic town within and the county seat of Loudoun County, Virginia, United States
Sterling
27,822
Census-designated place in Loudoun County, Virginia, US
Purcellville
10,285
Town in Virginia
Lovettsville
2,267
Town of the United States
Middleburg
835
Town in Loudoun County, Virginia
Official website of Loudoun County
Official Website
Twitter
Neighbors
Loudoun County has 8 neighbours.
Frederick County county in Maryland, United States
Montgomery County county in Maryland, United States
Washington County county in Maryland, United States
Clarke County county in Virginia, United States
Fairfax County county in Virginia, United States
Fauquier County county in Virginia, United States
Prince William County county in Virginia, United States
Jefferson County county in West Virginia, United States
Administrative areas
Leesburg
Demographics
The population of Loudoun County increased by 26.13% in 10 years.
Population by years (2010 - 2020)
Year
Population
% Change
Method
2010
312,311
-
census
2011
326,327
4.3%
estimation process
2012
337,847
3.41%
estimation process
2013
349,915
3.45%
estimation process
2014
362,206
3.39%
estimation process
2015
374,014
3.16%
estimation process
2016
385,546
2.99%
estimation process
2017
397,049
2.9%
estimation process
2018
405,522
2.09%
estimation process
2019
413,538
1.94%
estimation process
2020
422,784
2.19%
estimation process
Alternate Unofficial Names for Loudoun County
Christiana County, Comitatul Loudoun, Comte de Loudoun, Comté de Loudoun, Condado de Loudoun, Condado han Loudoun, Contea di Loudoun, Hrabstwo Loudoun, Konteth Loudoun, Laudon, Laudun, Loudoun, Loudoun County, Loudoun Kun, Loudoun Kūn, Loudoun konderria, Loudoun megye, Okres Loudoun, Okrug Laudon, Quan Loudoun, Quận Loudoun, lao deng xian, laudauna ka'unti, raudon jun, Лаудон, Лаудун, Округ Лаудон, لاؤڈاؤن کاؤنٹی, لاوڈن کاؤنٹی، ورجینیا, مقاطعة لاودون, লৌডৌন কাউন্টি, ラウドン郡, 勞登縣
People born in Loudoun County (28)
People born in Loudoun County, including politician Alfred H. Powell, Union United States Army officer George Washington Emery Dorsey, politician Christopher Greenup, .
List
Eli H. Janney (American mechanical engineer) he was born in 12/11/1831
Robert Ludwell Yates Peyton (Confederate Army officer and politician (1822-1863)) he was born in 08/02/1822
Robert H. Chilton (Confederate Army general) he was born in 25/02/1815
John Long (American politician (1785-1857)) he was born in 26/02/1785
John Thomson Mason (American lawyer and politician) he was born in 08/01/1787
Ben Montgomery ((1819-1877) American businessman) he was born in 01/01/1819
George Rust (United States general) he was born in 04/01/1788
Russell Baker (American writer and satirist (1925-2019)) he was born in 14/08/1925
John F. Ryan (American politician) he was born in 09/11/1848
John Mobberly (Confederate American Civil War guerrilla) he was born in 01/06/1844
Joseph R. Cockerill (American politician) he was born in 02/01/1818
R. Preston Chew (Horse artillery commander in the Confederate States Army) he was born in 09/04/1843
Richard Henry Dulany (Army colonel and horseman) he was born in 10/08/1820
Stephen Bradley (equestrian) he was born in 01/01/1962
Wilton Lackaye (American actor (1862-1932)) he was born in 30/09/1862
Henry S. Taylor (American poet) he was born in 21/06/1942
James Megeath (American pioneer) he was born in 18/11/1824
Isaiah L. Potts he was born in 01/01/1784
Virginia Other Counties (more counties)
County Name
Population
Title
Fairfax County
1,150,847
County in Virginia, United States
Prince William County
475,533
County in Virginia, United States
Virginia Beach
451,231
The most populous city in Virginia, Virginia Beach is a major center for tourism, military, and business.
Chesterfield County
358,245
County in South Carolina, United States
Henrico County
333,766
County in Virginia, United States
Chesapeake
247,011
The second most populous city in Virginia.
Norfolk
242,803
The most populous city in Virginia.
Arlington County
240,119
County in Virginia, United States; suburb of Washington, D.
Richmond
232,226
The capital of Virginia.
Arlington
229,164
A county in Virginia.
City of Portsmouth
215,133
Administrative division in Virginia, United States
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