Home > NJ > Warren County > Hackettstown > Zip 07840

Zip Code 07840 — Hackettstown, NJ

07840 is a ZIP Code associated with Hackettstown, NJ, located within Warren. The postal region supports an estimated population of 32,105 residents across Data Pending housing units, with a population density of 332.1 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.860340, -74.831920)

Data MetricLocal Statistic
Postal / Zip Code07840
Primary CityHackettstown
State / ProvinceNJ
CountyWarren
Total Population32,105
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density332.1 people/sq mi
TimezoneAmerica/New_York

How 07840 Compares

MetricZIP 07840Warren CountyNJ State Average
Population32,105116,1429,343,809
Median IncomeData PendingN/AN/A
Population Density332.1 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 07880Vienna2.9 mi173N/A
Zip 07870Schooleys Mountain3.8 mi34N/A
Zip 07828Budd Lake4.5 mi15,461N/A
Zip 07838Great Meadows4.6 mi3,727N/A
Zip 07820Allamuchy5.1 miN/AN/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 →