Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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zipcodes.pro — STATE/VA/COUNTY/LOUDOUN

Loudoun County, VA ZIP codes

There are 35 ZIP codes in Loudoun County, VA, in 17 towns, from 20101 to 20598. The largest are 20147 (Ashburn), 20148 (Ashburn) and 20176 (Leesburg).

The county seat is Leesburg.

ZIP codes
35
Towns
17
County seat
Leesburg
County FIPS
51107
Population
432,998
Median household income
$181,765
Land area
516 sq mi
Area codes
571, 703

Loudoun County ZIP codes by town

Leesburg (county seat)
20175, 20176, 20177, 20178

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Loudoun County ZIP codes

2010120102201032010420105201172011820129201312013220134201412014220146201472014820149201522015820159201602016320164201652016620167201752017620177201782018020184201892019720598

The ZIP codes of Loudoun County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Loudoun County in numbers

About 432,998 people live in Loudoun County, in 143,032 households, the 4th most populous of Virginia's 123 counties. The median household income is $181,765 a year, 95% above the Virginia median of $93,170 (US: $80,734). The median owner-occupied home is valued at $743,800 (94% above the Virginia median), and median gross rent is $2,386 a month. The median age is 38.2; 64.6% of adults 25 and over hold a bachelor's degree or higher (42.2% across Virginia); the average commute takes 30 minutes.

Population432,998Loudoun432,998
Households143,032Loudoun143,032
Median age38.2Loudoun38.2Virginia39.0US 38.9
Median household income$181,765Loudoun$181,765Virginia$93,170US $80,734
Median home value$743,800Loudoun$743,800Virginia$383,700US $332,700
Median gross rent$2,386Loudoun$2,386Virginia$1,579US $1,413
Bachelor's degree or higher64.6%Loudoun64.6%Virginia42.2%US 35.7%
Mean commute30.1 minLoudoun30.1 minVirginia27.3 minUS 26.4 min
Population density840 / sq miLoudoun840 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Loudoun County

Largest towns in Loudoun County
TownZIP codesPopulation
Leesburg 4 49,171
Ashburn 4 46,026
Aldie 1 37,639
Sterling 5 32,411
Chantilly 1 24,036
Purcellville 2 8,973
Lovettsville 1 2,719
Middleburg 2 774
Round Hill 2 678
Hamilton 2 589
Paeonian Springs 1 538
Waterford 1 220
Upperville 1 61

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Loudoun County.

Not sure you are in Loudoun County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Loudoun County, with figures

ZIP codes in Loudoun County
ZIP City Type Population Median income Median home
20101 Dulles , VA No street area — — —
20102 Dulles , VA No street area — — —
20103 Dulles , VA No street area — — —
20104 Dulles , VA No street area — — —
20105 Aldie , VA Standard 37,639 $219,123 $858,900
20117 Middleburg , VA Standard 2,790 $146,120 $937,100
20118 Middleburg , VA No street area — — —
20129 Paeonian Springs , VA Standard 538 $250,000+ $1,238,300
20131 Philomont , VA No street area — — —
20132 Purcellville , VA Standard 19,817 $181,875 $776,300
20134 Purcellville , VA No street area — — —
20141 Round Hill , VA Standard 8,359 $210,563 $736,700
20142 Round Hill , VA No street area — — —
20146 Ashburn , VA No street area — — —
20147 Ashburn , VA Standard 67,692 $163,904 $718,500
20148 Ashburn , VA Standard 64,021 $233,494 $873,700
20149 Ashburn , VA No street area — — —
20152 Chantilly , VA Standard 36,674 $197,156 $766,200
20158 Hamilton , VA Standard 4,979 $211,522 $765,800
20159 Hamilton , VA No street area — — —
20160 Lincoln , VA No street area — — —
20163 Sterling , VA No street area — — —
20164 Sterling , VA Standard 43,436 $135,660 $544,300
20165 Sterling , VA Standard 34,088 $183,076 $704,800
20166 Sterling , VA Standard 14,949 $133,401 $618,800
20167 Sterling , VA No street area — — —
20175 Leesburg , VA Standard 34,733 $174,854 $780,600
20176 Leesburg , VA Standard 51,471 $168,299 $747,100
20177 Leesburg , VA No street area — — —
20178 Leesburg , VA No street area — — —
20180 Lovettsville , VA Standard 7,531 $151,483 $664,400
20184 Upperville , VA Standard 635 $50,278 —
20189 Dulles , VA No street area — — —
20197 Waterford , VA Standard 1,825 $190,703 $1,080,200
20598 Dhs , VA No street area — — —

Cite this page

zipcodes.pro. “Loudoun County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/va/county/loudoun

Underlying data is public domain or openly licensed — sources, vintages and licences.