In which county is ZIP code 07840 located?

ZIP 07840 is listed under Warren, NJ.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 07840: Hackettstown, NJ

ZIP: 07840

County: Warren

Coordinates: 40.85290, -74.83430

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Hackettstown, NJ postal area 07840. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Hackettstown
ZIP Code	07840
County	Warren
State	NJ
Latitude / Longitude	40.85290, -74.83430
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 07840 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 07840 are listed as 40.85290 / -74.83430, useful for GPS and service checks in and around Hackettstown, NJ.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 07840 for mail delivery and general location reference in Warren, NJ.

This ZIP may extend beyond the city core into nearby communities within Warren.

Related ZIP Codes (Nearby)

Explore other postal codes near Hackettstown within NJ.

Frequently Asked Questions

What is the primary city for ZIP code 07840?

The primary city for this ZIP code is Hackettstown, located in NJ.

In which county is 07840 located?

ZIP code 07840 is situated within Warren, NJ.

What are the coordinates for 07840?

The approximate center point is 40.85290 (Latitude) and -74.83430 (Longitude).

Is ZIP code 07840 active?

This page lists ZIP 07840 as Listed based on the latest refresh date shown above.

Does ZIP 07840 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08