ZIP Code Tabulation Area · Virginia

ZIP Code 20166: Loudoun County, VA

ZIP Code 20166 (Loudoun County, Virginia) has an estimated 14,949 residents in 5,473 households. The median household income is $133,401, the median home value is $618,800 and the median gross rent is $2,362/mo. Figures are U.S. Census Bureau American Community Survey 2020–2024 5-year estimates for the matching ZIP Code Tabulation Area.

American Community Survey 2020–2024 5-year estimates · Updated Oct 26, 2026

Total population

14,949

Margin of error ±1,299

Median household income

$133,401

Margin of error ±$12,898

Median home value

$618,800

Margin of error ±$22,988

Median gross rent

$2,362/mo

Margin of error ±$190

Median age

34.0 yrs

Margin of error ±1.4 yrs

Mean travel time to work

27.9 min

Margin of error ±4.2 min

How ZIP 20166 compares with Virginia and the U.S.

State and national figures are the Census Bureau's own estimates for those areas from the same ACS release, not averages of ZIP codes.

Median age

ZIP 2016634.0 yrsVirginia39.0 yrsUnited States38.9 yrs

Median household income

ZIP 20166$133,401Virginia$93,170United States$80,734

Per capita income

ZIP 20166$58,048Virginia$50,666United States$44,673

Poverty rate

ZIP 201664.1%Virginia9.9%United States12.5%

Unemployment rate

ZIP 201664.1%Virginia4.3%United States5.2%

Bachelor's degree or higher

ZIP 2016665.3%Virginia42.2%United States35.7%

Median home value

ZIP 20166$618,800Virginia$383,700United States$332,700

Median gross rent

ZIP 20166$2,362/moVirginia$1,579/moUnited States$1,413/mo

Owner-occupied homes

ZIP 2016649.5%Virginia67.3%United States65.2%

Mean travel time to work

ZIP 2016627.9 minVirginia27.3 minUnited States26.4 min

Worked from home

ZIP 2016626.9%Virginia18.3%United States15.1%

All figures for ZIP 20166

Each estimate has a 90% margin of error: the true value is likely within that range. * marks estimates with a large margin of error (a coefficient of variation above 30%, or ±10 percentage points or more for rates).

ZIP 20166 — ACS 2020–2024 5-year estimates
Measure	ZIP 20166	Margin of error	Virginia	United States
Total population	14,949	±1,299	8,705,170	334,922,499
Median age	34.0 yrs	±1.4 yrs	39.0 yrs	38.9 yrs
Households	5,473	±345	3,365,732	129,227,496
Median household income	$133,401	±$12,898	$93,170	$80,734
Per capita income	$58,048	±$5,071	$50,666	$44,673
Poverty rate	4.1%	±2.1 pts	9.9%	12.5%
Unemployment rate	4.1%	±1.8 pts	4.3%	5.2%
Bachelor's degree or higher	65.3%	±4.0 pts	42.2%	35.7%
Median home value	$618,800	±$22,988	$383,700	$332,700
Median gross rent	$2,362/mo	±$190	$1,579/mo	$1,413/mo
Owner-occupied homes	49.5%	±4.0 pts	67.3%	65.2%
Mean travel time to work	27.9 min	±4.2 min	27.3 min	26.4 min
Worked from home	26.9%	±3.5 pts	18.3%	15.1%

Race and Hispanic or Latino origin

Shares of the total population by the Census Bureau's race and Hispanic or Latino origin categories (table B03002), listed in the Census Bureau's order. People self-identify on the survey.

Population by race and Hispanic or Latino origin, ZIP 20166
Group	ZIP 20166	Virginia	United States
White alone, not Hispanic or Latino	29.8%	58.4%	57.4%
Black or African American alone, not Hispanic or Latino	13.2%	18.3%	11.9%
American Indian and Alaska Native alone, not Hispanic or Latino	0.1%	0.1%	0.5%
Asian alone, not Hispanic or Latino	32.0%	6.9%	5.9%
Native Hawaiian and Other Pacific Islander alone, not Hispanic or Latino	0.1%	0.1%	0.2%
Some other race alone, not Hispanic or Latino	2.7%	0.6%	0.6%
Two or more races, not Hispanic or Latino	5.1%	4.7%	4.3%
Hispanic or Latino (of any race)	17.0%	11.0%	19.3%

Where ZIP 20166 is

State: Virginia
Main county: Loudoun County
Largest overlapping place: Dulles Town Center (9% of the ZIP's land area)
Land area: 27.19 sq mi· about 550 people per sq mi

County and place names come from the Census Bureau's 2020 ZCTA relationship files. A ZIP code's mailing city, set by the U.S. Postal Service, can differ from these names.

Other ZIP codes in Loudoun County

20105 Loudoun County, VA 20117 Loudoun County, VA 20129 Loudoun County, VA 20132 Loudoun County, VA 20141 Loudoun County, VA 20147 Ashburn, VA 20148 Brambleton, VA 20152 South Riding, VA 20158 Loudoun County, VA 20164 Sterling, VA 20165 Cascades, VA 20175 Loudoun County, VA 20176 Loudoun County, VA 20180 Loudoun County, VA 20184 Loudoun County, VA 20197 Loudoun County, VA

See every ZIP code in Virginia, or compare ZIP 20166 with another ZIP code.

Census figures describe residents as a group and cannot tell you about any one home or street. For a specific address, check local government and housing records.

About ZIP codes and ZCTAs: the Census Bureau publishes statistics for ZIP Code Tabulation Areas, which approximate USPS ZIP code delivery areas. Learn how they differ.

Sources

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, detailed tables B01003, B01002, B11001, B19013, B19301, B17001, B23025, B15003, B25077, B25064, B25003, B08013, B08303, B08301, B03002 — snapshot Oct 26, 2026.
U.S. Census Bureau, 2020 ZCTA5 relationship files (county and place).
Data: U.S. Census Bureau, American Community Survey 5-year estimates (detailed tables) and 2020 Census ZCTA relationship files. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau. These agencies do not endorse OpenZIP.