• county
  • FIPS 51107
  • Largest town: Leesburg

Loudoun County, Virginia

Loudoun County had 443,380 residents in the Census Vintage 2024 estimate, on 515.7 square miles of land. It ranks 4th of 133 in Virginia by population and 20th by land area.

Population
443,380
#4 of 133 in Virginia · #168 in US
Area
515.7 sq mi
#20 of 133 in Virginia · #2,023 in US
Density
860 / sq mi
#38 of 133 in Virginia · #180 in US
Median household income
$173,655
#1 of 133 in Virginia · #1 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Loudoun County within Virginia. Pin: Richmond.

Measure from here

Tools and pages that start from Loudoun County

Loudoun County population, land area and income

Loudoun County had 443,380 residents in the Census Vintage 2024 estimate, on 515.7 square miles of land. It ranks 4th of 133 in Virginia by population and 20th by land area. That works out to 859.7 people per square mile, 8.9 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Virginia has 27,800 residents, so Loudoun County is 15.9 times that size.

Its SAIPE 2023 median household income of $173,655 is the highest among 3,143 counties with an estimate.

National rank among 3,144

Population

443,380

3144th1st

168th of 3,144 (US)

Land area

516 sq mi

3144th1st

2023rd of 3,144 (US)

Density

859.7 / sq mi

3144th1st

180th of 3,144 (US)

Median household income

$173,655

3143rd1st

1st of 3,143 (US)

Rank within Virginia (133)

Population

443,380

133rd1st

4th of 133 (VA)

Land area

516 sq mi

133rd1st

20th of 133 (VA)

Density

859.7 / sq mi

133rd1st

38th of 133 (VA)

Median household income

$173,655

133rd1st

1st of 133 (VA)

How Loudoun County's population changed since 2020

Loudoun County gained 20,657 residents between the July 2020 and July 2024 estimates, a rise of 4.9%. That ranks 26th of 133 in Virginia for growth. The median Virginia county changed by +1.3%, and the state as a whole by +2.0%.

Since the April 2020 estimates base, Loudoun County recorded 20,384 births and 7,779 deaths, a natural change of +12,605. Net international migration added +11,123 and net domestic migration, people moving to or from other US counties, came to -1,803. The largest single component was natural change, which added 12,605 people.

422.7k2020428.8k2021432.9k2022437.2k2023443.4k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
20,384
Deaths
7,779
Net international migration
+11,123
Net domestic migration
-1,803
Change, July 2023 to July 2024
+6,216

Where Loudoun County is

The Census internal point of Loudoun County is at 39.081200, -77.638900. It sits in UTM zone 18N. The map shades Virginia's 133 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Loudoun County outlined. Dots are towns of 1,000+ people with residents in it.

Martinsville city: +2.7%Norton city: -5.5%Charlottesville city: -3.6%Winchester city: -0.7%Bristol city: -5.7%Manassas Park city: -3.2%Fluvanna County: +5.3%Clarke County: +5.3%Lunenburg County: +0.9%Colonial Heights city: +2.8%Franklin city: +2.8%Lexington city: +6.7%Petersburg city: +2.0%Suffolk city: +8.8%Emporia city: -5.1%Middlesex County: +3.2%Fairfax city: +8.9%Fredericksburg city: +7.1%Floyd County: +1.2%Radford city: +7.2%Waynesboro city: +5.5%Hopewell city: -0.2%Staunton city: +2.1%Buena Vista city: -0.6%Covington city: -1.4%Poquoson city: +3.1%Madison County: +2.8%Falls Church city: +2.4%Franklin County: +2.1%Mecklenburg County: +1.8%Smyth County: -2.2%Pittsylvania County: -1.6%Frederick County: +6.7%Russell County: -1.3%Nottoway County: -0.1%Scott County: -0.9%Mathews County: +1.0%Stafford County: +7.1%Goochland County: +13.5%Henrico County: +1.1%Caroline County: +8.2%Prince George County: +1.2%Prince William County: +2.9%Cumberland County: +4.0%Essex County: +0.8%Fairfax County: +1.1%Henry County: -2.9%Carroll County: +0.3%Grayson County: -0.1%Louisa County: +11.4%James City County: +5.5%Albemarle County: +4.2%Lynchburg city: +1.7%King William County: +7.3%Charles City County: -2.7%Northumberland County: +4.7%Alexandria city: -0.0%Salem city: +2.0%Galax city: +0.3%Isle of Wight County: +5.8%Newport News city: -1.6%Tazewell County: -3.8%Amherst County: +1.1%Manassas city: +2.2%Buckingham County: +1.7%Shenandoah County: +2.7%Richmond city: +3.0%Alleghany County: -3.7%Culpeper County: +6.4%Warren County: +4.1%Northampton County: -1.7%Southampton County: -0.1%Portsmouth city: -1.5%Rockingham County: +4.6%Orange County: +7.1%Sussex County: -0.4%Bland County: -1.1%Chesapeake city: +2.1%Harrisonburg city: -1.0%Powhatan County: +6.4%Virginia Beach city: -1.1%Dinwiddie County: +2.5%Campbell County: -0.5%Gloucester County: +3.7%Greene County: +5.5%Page County: -0.0%Halifax County: -1.4%Hanover County: +4.6%Buchanan County: -8.0%Highland County: +4.8%Surry County: +0.4%Westmoreland County: +3.9%Wythe County: -0.8%Greensville County: -2.2%Roanoke city: -2.0%Loudoun County: +4.9%Spotsylvania County: +8.1%Brunswick County: -0.5%King George County: +7.4%Bedford County: +3.3%Patrick County: -1.6%Lancaster County: +1.4%Nelson County: +0.2%Montgomery County: -0.6%Amelia County: +3.4%York County: +1.7%Norfolk city: -2.8%Williamsburg city: +3.6%Bath County: -2.8%Accomack County: +0.0%Washington County: +0.4%Pulaski County: -0.7%Rockbridge County: -1.3%Roanoke County: +0.4%Wise County: -3.0%Fauquier County: +3.9%Craig County: -1.0%Charlotte County: -2.4%Richmond County: +3.3%Lee County: -1.5%Chesterfield County: +6.7%Danville city: -1.4%King and Queen County: +2.4%Prince Edward County: +1.7%Hampton city: +0.2%Appomattox County: +4.9%Botetourt County: +1.5%Arlington County: +0.4%Rappahannock County: +2.1%New Kent County: +17.7%Augusta County: +1.3%Giles County: -1.5%Dickenson County: -4.7%
Change 2020 to 2024
  1. < -1.4%
  2. < +0.3%
  3. < +2.1%
  4. < +4.7%
  5. ≥ +4.7%
no data

Orange pin: Loudoun County internal point. Dark pin: Richmond.

Internal point

Decimal
39.081200, -77.638900
DMS
39°04'52.32"N 77°38'20.04"W
UTM
18N 271737.7E 4329102.7N
Geohash
dqby36906
Plus code
87F439J6+FC

Towns in Loudoun County

3 incorporated places of 1,000+ people have residents in Loudoun County, 61,515 people together, or 14% of the county. Each figure counts only the part of the town inside Loudoun County; towns marked "part" extend into another county. The largest is Leesburg with 49,831.

  1. 01Leesburg49,831
  2. 02Purcellville8,965
  3. 03Lovettsville2,719
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Loudoun County

The Census 2024 county adjacency file lists 8 neighbors for Loudoun County, including 4 across a state line. The most populous is Fairfax County, VA, with 1,160,925 residents. Distances run between Census internal points in a straight line.

Distance to Richmond and the nearest big city

Richmond is 107.1 miles S of Loudoun County's internal point in a straight line. The nearest place of 100,000 or more is Alexandria, VA (population 159,102), 34.9 miles away. The nearest place of 10,000 or more is Leesburg, VA (population 49,831), 4.6 miles away.

Loudoun County FIPS code

The FIPS code of Loudoun County is 51107: state code 51 for Virginia plus county code 107. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $173,655.

Questions people ask

What is the population of Loudoun County, Virginia?

The Census Vintage 2024 estimate for July 1, 2024 is 443,380. That is up 20,657 people (4.9%) from the July 2020 estimate of 422,723.

What is the FIPS code of Loudoun County?

51107. The first two digits (51) are Virginia; the last three (107) identify the county.

What is the largest town in Loudoun County?

Leesburg, with 49,831 residents inside Loudoun County in 2024.

Which counties border Loudoun County?

8 county-equivalents border it in the Census 2024 adjacency file: Fairfax County, VA; Montgomery County, MD; Prince William County, VA; Frederick County, MD; Washington County, MD; Fauquier County, VA; Jefferson County, WV; Clarke County, VA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.