There are 17 zip codes in Loudoun County, Virginia. The most populated is 20147, located in Ashburn. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
City
Population
20147Ashburn66,917
20148Ashburn62,554
20176Leesburg50,640
20164Sterling42,310
20152Chantilly35,538
20165Sterling34,222
20105Aldie33,967
20175Leesburg33,189
20132Purcellville19,114
20166Sterling13,479
20141Round Hill8,425
20180Lovettsville7,571
20158Hamilton4,886
20117Middleburg2,997
20197Waterford2,359
20129Paeonian Springs533
20184Upperville442

Loudoun County, Virginia Zip Codes by Population (2024)