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Zip Code 08542 — Princeton, NJ

08542 is a ZIP Code associated with Princeton, NJ, located within Mercer. 08542 ranks #20 out of 22 ZIP codes in Mercer County by population (and #498 out of 598 in NJ). The area supports an estimated population of 2,533 residents across Data Pending housing units, with a population density of 2,538.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.354520, -74.660640)

Data MetricLocal Statistic
Postal / Zip Code08542
Primary CityPrinceton
State / ProvinceNJ
CountyMercer
Total Population2,533
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2,538.1 people/sq mi
TimezoneAmerica/New_York

How 08542 Compares

MetricZIP 08542Mercer CountyNJ State Average
Population2,533395,671 (Total)9,343,809 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density2,538.1 /sq mi----
County Pop Rank#20 of 22----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 08544Princeton0.6 mi4,392N/A
Zip 08540Princeton0.7 mi50,388N/A
Zip 08528Kingston3.2 mi321N/A
Zip 08553Rocky Hill3.3 mi819N/A
Zip 08536Plainsboro4.2 mi20,817N/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 →