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Zip Code 08821 — Flagtown, NJ

08821 is a ZIP Code associated with Flagtown, NJ, located within Somerset. 08821 ranks #26 out of 27 ZIP codes in Somerset County by population (and #559 out of 598 in NJ). The area supports an estimated population of 283 residents across Data Pending housing units, with a population density of 459.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.520740, -74.688350)

Data MetricLocal Statistic
Postal / Zip Code08821
Primary CityFlagtown
State / ProvinceNJ
CountySomerset
Total Population283
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density459.6 people/sq mi
TimezoneAmerica/New_York

How 08821 Compares

MetricZIP 08821Somerset CountyNJ State Average
Population283328,603 (Total)9,343,809 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density459.6 /sq mi----
County Pop Rank#26 of 27----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 08844Hillsborough1.7 mi44,463N/A
Zip 08853Neshanic Station2.9 mi5,634N/A
Zip 08869Raritan4.3 mi8,368N/A
Zip 08876Somerville4.7 mi23,380N/A
Zip 08502Belle Mead5.3 mi11,849N/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 →