County ProfileVA
Loudoun County
Population: 420,959 · 25 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
420,959
People
Median age
38.2
Housing
Total households
143,032
Income
Median household income
$181,765
Housing
Total housing units
147,003
Employment
Employment rate
71.2%
Education
Bachelor’s degree or higher
64.6%
Healthcare
Insured population
94.6%
County details
Local time 04:49:33(ET)| Name | Loudoun |
|---|---|
| Total ZIP codes | 25total |
| ZIP codes (by type) | 15 Standard9 PO Box1 Unique |
| Area code | 540, 571, 703, 826 |
| Timezone | Eastern Time (ET) |
| Coordinates | 39.0812, -77.6388976 |
| Land area | 515.7 sq miles(1,335.8 km²) |
Map of Loudoun county, Virginia with ZIP codes
Cities and Communities in Loudoun County
Compare the largest cities in Loudoun County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Leesburg | 48,250 | $145,205 | 4ZIPs |
| Ashburn | 46,349 | $154,978 | 4ZIPs |
| Sterling | 30,337 | $123,303 | 5ZIPs |
| Purcellville | 8,929 | $165,121 | 2ZIPs |
| Lovettsville | 2,694 | $141,406 | 1ZIPs |
| Round Hill | 693 | $127,266 | 2ZIPs |
| Middleburg | 669 | $104,545 | 2ZIPs |
| Hamilton | 619 | $141,250 | 2ZIPs |
| Paeonian Springs | 482 | — | 1ZIPs |
| Waterford | 181 | — | 1ZIPs |
| Aldie | 70 | — | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Loudoun County
Review the most populated postal areas across Loudoun County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
| ZIP | City | Median incomeHousehold | Population (ZIP) |
|---|---|---|---|
| 20147 | Ashburn | $163,904 | 66,394 |
| 20148 | Ashburn | $233,494 | 61,793 |
| 20176 | Leesburg | $168,299 | 51,777 |
| 20164 | Sterling | $135,660 | 40,888 |
| 20105 | Aldie | $219,123 | 34,475 |
| 20165 | Sterling | $183,076 | 33,777 |
| 20175 | Leesburg | $174,854 | 33,245 |
| 20132 | Purcellville | $181,875 | 18,483 |
| 20166 | Sterling | $133,401 | 14,164 |
| 20141 | Round Hill | $210,563 | 8,178 |
| 20180 | Lovettsville | $151,483 | 8,073 |
| 20158 | Hamilton | $211,522 | 4,639 |
| 20117 | Middleburg | $146,120 | 2,746 |
| 20197 | Waterford | $190,703 | 2,558 |
| 20129 | Paeonian Springs | $250,001 | 482 |
| 20118 | Middleburg | — | — |
| 20134 | Purcellville | — | — |
| 20142 | Round Hill | — | — |
| 20146 | Ashburn | — | — |
| 20149 | Ashburn | — | — |
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS