Loudoun County, Virginia

Loudoun County: County in Virginia, United States


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 267 years ago in 1756.

Loudoun County locator map
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 : 15:44:50 (20th June 2024)
Density : 313 Pop. per km² as of 2020
Population growth : 26.13% (2010-2020)
Loudoun County Courthouse in Leesburg Virginia image
Loudoun County Courthouse in Leesburg Virginia
Loudoun County Courthouse in Leesburg Virginia image


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

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

Loudoun County has 8 neighbours.

  • Leesburg


The population of Loudoun County increased by 26.13% in 10 years.

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

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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, .


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
Newport News 179,062 The second most populous city in Virginia.
Alexandria 158,726 A city in Virginia.
Stafford County 156,748 County in Virginia, United States
East Hampton 147,993 Town in New York
Spotsylvania County 138,449 County in Virginia, United States