Virginia

Loudoun

420,959
2020 population
1790
first census record
24
census records

About Loudoun

Loudoun, Virginia, first appears in the United States federal census in 1790, when it recorded a population of 18,962. At the most recent census, in 2020, its population stood at 420,959.

The county's recorded population has risen across the decades to its highest level in 2020.

On the ground today, 40 documented military engagements have been recorded within the county, among them Battle of Balls Bluff, Leesburg Occupation (Confederate, 1861), Aldie Skirmish (1861), and 102 places are listed on the National Register of Historic Places.

Population by decade

Census YearPopulationChart
2020420,959
2010312,311
2000169,599
199086,129
198057,427
197037,150
196024,549
195021,147
194020,291
193019,852
192020,577
191021,167
190021,948
189023,274
188023,634
187020,929
186021,774
185022,079
184020,431
183021,939
182022,702
181021,338
180020,523
179018,962
Source

Population data from the United States decennial census, U.S. Census Bureau (public domain).

Battles & engagements in Loudoun

Military engagements that took place in Loudoun, Virginia.

Battle of Balls Bluff
1861
Leesburg Occupation (Confederate, 1861)
1861
Aldie Skirmish (1861)
1861
Edwards Ferry Skirmish (1861)
1861
Battle of Ball's Bluff
1861
Ball's Bluff
1861
Engagement at Leesburg VA (Ball's Bluff)
1861
Skirmish at Waterford
1862
Engagement at Bloomfield (Loudoun)
1862
Snicker's Gap Cavalry Fight
1862
Raid on Leesburg (1862)
1862
Engagement at White's Ford
1862
Ashby's Gap Fight
1862
Waterford Quaker Loyalist Skirmish
1862
Action at Munford's Ford
1862
Engagement at Aldie Mill (1862)
1862
Harpers Ferry — Skirmish at Loudoun Heights (September 13–14 1862)
1862
Raid on Hillsboro (Loudoun)
1862
Loudoun Heights Confederate Placement (September 13-14, 1862)
1862
Action at Miskel's Farm
1863
Mosby's Raid at Middleburg
1863
Mosby's Raid at Aldie
1863
Mosby's Miskel Farm Attack (April 1, 1863)
1863
Battle of Middleburg
1863
Mosby Raid at Miskel Farm
1863
Battle of Middleburg — First Fight (June 17 1863)
1863
Aldie (June 17 1863)
1863
Battle of Aldie (Loudoun County)
1863
Battle of Middleburg (Loudoun County)
1863
Battle of Aldie
1863
Mosby Skirmish at Upperville
1863
Skirmish at Unison (Loudoun)
1863
Engagement at Snicker's Gap (cavalry)
1863
Upperville Battle (June 21, 1863)
1863
Middleburg (June 19 1863)
1863
Aldie Cavalry Battle (June 17, 1863)
1863
Battle of Middleburg — Second Fight (June 19 1863)
1863
Mosby's Dullsville Ambush (Wagon Train)
1863
Mosby Raid at Waterford
1863
Mosby's Rangers — Miskel Farm Ambush
1863

Historic places in Loudoun

National Register of Historic Places listings in Loudoun, Virginia.

Farmer's Delight
Leithtown
Janelia
Ashburn
Carlheim
Leesburg
Benton
Middleburg
Oatlands
Leesburg
Cleremont Farm
Upperville
Welbourne
Middleburg
Douglass High School
Leesburg
Clapham's Ferry
Leesburg
Marshall, Gen. George C., House
Leesburg
Goose Creek Meetinghouse Complex
Lincoln
Broad Run Bridge and Tollhouse
Sterling
Goose Creek Stone Bridge
Atoka
Paeonian Springs Historic District
Paeonian Springs
Morven Park
Leesburg
Much Haddam
Middleburg
Aldie Mill Historic District
Aldie
Glebe of Shelburne Parish
Lincoln
Belmont
Ashburn
Fair Oaks
Aldie
Bluemont Historic District
Bluemont
Ebenezer Baptist Churches
Bloomfield
Leesburg Historic District
Leesburg
Mitchell, Gen. William, House
Middleburg
Browse all Virginiahistoric sites ›

Other counties in Virginia

Explore census history and historic records for more Virginia counties.

AppomattoxArlingtonAugustaBathBedfordBedford cityBlandBotetourtBristolBristol cityBrunswickBuchananBuckinghamBuena VistaBuena Vista cityCampbellCarolineCarrollCharles CityCharlotte
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Everything a full report reveals about Loudoun County, Virginia

This page charts the census history of Loudoun County, Virginia. A full Aubrey report for an address here pulls together everything the historical record holds about the ground, from the earliest settlement to the twentieth century:

Overview
An interactive map of the location with historic sites, battles and Native heritage plotted, and its full story era by era.
The Land
The historic sites and place names around the location, and how this land was settled and used.
Geology
The bedrock beneath the site, its age and rock type, reaching back millions of years.
LiDAR Terrain
Laser-scanned terrain that reveals earthworks and old features hidden in the landscape.
Conflict & War
The battles, raids and skirmishes fought near here, across every era of American conflict.
The Civil War
The Civil War on this ground, 1861 to 1865: who held it, and the battles, camps and regiments nearby.
The Soldiers
The men who marched from here in the Civil War, named and traced where the record allows.
Native Heritage
The Native nations who held this land, mapped across time from before European contact to today.
Settlement
Who claimed and held this ground, from Indigenous homelands through the colonial powers to the United States.
The Community
How the town grew, who came, and what kind of place it became, traced through the census record.
Rivers & Rail
The rivers, canals and railroads that connected this place between 1830 and 1911.
Notable People
The people born, buried or genuinely tied to this exact place, with their stories.
Historical Maps
Historic maps of the location layered over how it looks today.
Finds & Access
Museum objects tied to the area, and the laws on searching, collecting and access here.
Literature
The old books, county histories and archives that mention this place, quoted with their sources.
Spotlight
A deep dive into the most remarkable, lesser-known history of the place, traced back to the record.
Points of Interest
The most significant historic sites and landmarks near the location, and why they matter.
Timeline
The whole story of the location told era by era, from first peoples to the present day.
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Frequently asked about Loudoun

When does Loudoun first appear in the US census?
Loudoun, Virginia first appears in the federal census in 1790, with a recorded population of 18,962.
What is the population of Loudoun?
At the most recent federal census (2020), Loudoun had a recorded population of 420,959.
Were any battles fought in Loudoun?
40 documented military engagements took place in Loudoun, including Battle of Balls Bluff, Leesburg Occupation (Confederate, 1861), Aldie Skirmish (1861).
How many historic places are in Loudoun?
102 sites are listed on the National Register of Historic Places in Loudoun, Virginia.
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