City · New Jersey · United States
Hackettstown, NJ — ZIP codes
1 ZIP code · Warren County
- City
- Hackettstown
- County
- Warren
- State
- New Jersey
- Country
- United States
- Postal code
- 07840Single source
- Coordinates
- 40.8529, -74.8343 View on OpenStreetMap
- Area code
- 908
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 07840 | Hackettstown | Single source |
Sources and verification
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.