Home > VA > Fairfax County > Herndon > Zip 20171

Zip Code 20171 — Herndon, VA

20171 is a ZIP Code associated with Herndon, VA, located within Fairfax. 20171 ranks #3 out of 43 ZIP codes in Fairfax County by population (and #24 out of 903 in VA). The area supports an estimated population of 51,286 residents across Data Pending housing units, with a population density of 1,704.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.924600, -77.398240)

Data MetricLocal Statistic
Postal / Zip Code20171
Primary CityHerndon
State / ProvinceVA
CountyFairfax
Total Population51,286
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density1,704.5 people/sq mi
TimezoneAmerica/New_York

How 20171 Compares

MetricZIP 20171Fairfax CountyVA State Average
Population51,2861,173,352 (Total)8,705,380 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density1,704.5 /sq mi----
County Pop Rank#3 of 43----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 20191Reston2.6 mi31,011N/A
Zip 20151Chantilly3.2 mi22,610N/A
Zip 22033Fairfax3.5 mi39,526N/A
Zip 20170Herndon4.0 mi43,866N/A
Zip 20190Reston4.0 mi22,012N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →