Home > NJ > Middlesex County > Monroe Township > Zip 08831

Zip Code 08831 — Monroe Township, NJ

08831 is a ZIP Code associated with Monroe Township, NJ, located within Middlesex. The postal region supports an estimated population of 55,658 residents across Data Pending housing units, with a population density of 418.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.329080, -74.430660)

Data MetricLocal Statistic
Postal / Zip Code08831
Primary CityMonroe Township
State / ProvinceNJ
CountyMiddlesex
Total Population55,658
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density418.9 people/sq mi
TimezoneAmerica/New_York

How 08831 Compares

MetricZIP 08831Middlesex CountyNJ State Average
Population55,658881,6259,343,809
Median IncomeData PendingN/AN/A
Population Density418.9 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 08828Helmetta3.4 mi2,459N/A
Zip 08810Dayton4.5 mi7,952N/A
Zip 08884Spotswood5.0 mi8,187N/A
Zip 08512Cranbury5.0 mi12,928N/A
Zip 07726Englishtown5.6 mi44,764N/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 →