Data Last Updated: January 1, 2025

Loudoun County, VA ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Loudoun, VA.	39 ZIP Codes (17 General, 11 PO Box, 6 Unique, & 5 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Loudoun, VA. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	540, 571, 703, 826
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Eastern
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Loudoun, VA from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	420,959 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	51107
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Washington-Arlington-Alexandria, DC-VA-MD-WV
Land Area: The approximate amount of land area covered by Loudoun, VA in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	516 square miles
Water Area: The approximate amount of water area covered by Loudoun, VA in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	6 square miles
Coordinates: The latitude/longitude centroid coordinates for Loudoun County, VA.	-77.635721, 39.090654
Quick Link: Copy the direct link to the Loudoun, VACounty page and use anywhere you like!	https://www.zip-codes.com/county/va-loudoun.asp

Loudoun, VA ZIP Code Boundaries

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Loudoun County, VA Covers 39 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 20101	Unique	Dulles	0	0.00%
ZIP Code 20102	Unique	Dulles	0	0.00%
ZIP Code 20103	Unique	Dulles	0	0.00%
ZIP Code 20104	Unique	Dulles	0	0.00%
ZIP Code 20105	General	Aldie	34,475	8.19%
ZIP Code 20117	General	Middleburg	2,746	0.65%
ZIP Code 20118	P.O. Box	Middleburg	0	0.00%
ZIP Code 20120 *	General	Centreville	42,697	--
ZIP Code 20129	General	Paeonian Springs	482	0.11%
ZIP Code 20130 *	General	Paris	359	--
ZIP Code 20131	P.O. Box	Philomont	0	0.00%
ZIP Code 20132	General	Purcellville	18,483	4.39%
ZIP Code 20134	P.O. Box	Purcellville	0	0.00%
ZIP Code 20135 *	General	Bluemont	2,935	--
ZIP Code 20141	General	Round Hill	8,178	1.94%
ZIP Code 20142	P.O. Box	Round Hill	0	0.00%
ZIP Code 20146	P.O. Box	Ashburn	0	0.00%
ZIP Code 20147	General	Ashburn	66,394	15.77%
ZIP Code 20148	General	Ashburn	61,793	14.68%
ZIP Code 20149	Unique	Ashburn	0	0.00%
ZIP Code 20152	General	Chantilly	37,013	8.79%
ZIP Code 20158	General	Hamilton	4,639	1.10%
ZIP Code 20159	P.O. Box	Hamilton	0	0.00%
ZIP Code 20160	P.O. Box	Lincoln	0	0.00%
ZIP Code 20164	General	Sterling	40,888	9.71%
ZIP Code 20165	General	Sterling	33,777	8.02%
ZIP Code 20166	General	Sterling	14,164	3.36%
ZIP Code 20167	P.O. Box	Sterling	0	0.00%
ZIP Code 20175	General	Leesburg	33,245	7.90%
ZIP Code 20176	General	Leesburg	51,777	12.30%
ZIP Code 20177	P.O. Box	Leesburg	0	0.00%
ZIP Code 20178	P.O. Box	Leesburg	0	0.00%
ZIP Code 20180	General	Lovettsville	8,073	1.92%
ZIP Code 20184 *	General	Upperville	735	--
ZIP Code 20189	General	Dulles	0	0.00%
ZIP Code 20197	General	Waterford	2,558	0.61%
ZIP Code 22066 *	General	Great Falls	18,165	--

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Loudoun, VA, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Loudoun, VA Information

Loudoun County, VA Covers 39 ZIP Codes. This includes 17 General ZIP Codes, 11 PO Box ZIP Codes, and 6 Unique (reserved for Business and Volume Mail Receivers). There are also 5 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Loudoun County.

The population for Loudoun County is 420,959, according to the U.S. Census. Population Density is 815.81 persons per square mile. With 142,074 Housing Units, the Average Household Size is 3.05 persons. There are 137,442 Family Households with an Average Family Size of 2.63 persons. 5.09% of the population is without Health Insurance. The 71.99% Employment Rate is 12.19% above the national average of 59.8%.266,804 people aged 25+ have some educational achievement, with 62.98% (or 168,028 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 4 area codes serving this area including540, 571, 703 and 826. Loudoun is also located in the Eastern timezone and the current local time is shown above.

Loudoun is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Core Based Statistical Area (CBSA). Its CBSA Code is 47900.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Loudoun, VA have 149,670 Residential mailboxes and 9,088 Business mailboxes.There are 12,125 businesses with a total of 182,412 employees. That is an average of 15.0 employees per business. Annual payroll for these businesses is $12,964,533,000. Other Demographics

Loudoun County Demographic Profile

Population & People

Total Population

420,959

Income

Median Household Income

$156,821

Housing

Total Housing Units

142,074

Health

Without Healthcare Coverage

5.09%

Business & Economy

Total Businesses

12,125

Families

Total Households

137,442

Employment

Employment Rate

71.99%

Education

Bachelor's Degree or Higher

62.98%

Total Population: Total number of people from the 2020 U.S. Census for Loudoun, VA. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	420,959
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Loudoun, VA. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	457,379
Total Households: Total number of Households from the 2020 U.S. Census for Loudoun, VA. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	137,442
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	142,074
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.05
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.63

Other Loudoun Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	149,670
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	9,088
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	210,738
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	73,294
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	19,047

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	12,125
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$3,073,360,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$12,964,533,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	182,412

Sum of all ZIP Codes assigned Loudoun, VA as their primary County.

References

U.S. Postal Service [Last Updated: 1/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 1/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov