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Zip Code 20109 — Manassas, VA

20109 is a ZIP Code associated with Manassas, VA, located within Prince William. 20109 ranks #4 out of 15 ZIP codes in Prince William County by population (and #31 out of 903 in VA). The area supports an estimated population of 45,444 residents across Data Pending housing units, with a population density of 736.4 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.794720, -77.531050)

Data MetricLocal Statistic
Postal / Zip Code20109
Primary CityManassas
State / ProvinceVA
CountyPrince William
Total Population45,444
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density736.4 people/sq mi
TimezoneAmerica/New_York

How 20109 Compares

MetricZIP 20109Prince William CountyVA State Average
Population45,444493,241 (Total)8,705,380 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density736.4 /sq mi----
County Pop Rank#4 of 15----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 20110Manassas4.1 mi49,890N/A
Zip 20121Centreville4.1 mi27,788N/A
Zip 20136Bristow4.2 mi32,325N/A
Zip 20155Gainesville4.9 mi37,486N/A
Zip 20120Centreville5.0 mi42,896N/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 →