ZIP Code 08557: Sergeantsville, NJ
County: Hunterdon
Coordinates: 40.44590, -74.94350
ZIP Type: Standard
Time Zone: Eastern Time (ET)
Get a reliable snapshot of the Sergeantsville, NJ postal area 08557. This page summarizes county, coordinates, and local facts to help with services and location research.
| Primary City | Sergeantsville |
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| ZIP Code | 08557 |
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| County | Hunterdon |
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| State | NJ |
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| Latitude / Longitude | 40.44590, -74.94350 |
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| ZIP Type | Standard |
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| Time Zone | Eastern Time (ET) |
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| Data Updated | 2026-01-08 |
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These links show the approximate center point for ZIP 08557 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 08557 is approximately 40.44590 (latitude) and -74.94350 (longitude). This location sits within Hunterdon, contributing to regional planning across NJ.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 08557 for mail delivery and general location reference in
Hunterdon,
NJ.
Some addresses near Sergeantsville may share this ZIP due to delivery routing and local service areas.
Related ZIP Codes (Nearby)
Explore other postal codes near Sergeantsville within NJ.
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Frequently Asked Questions
What is the primary city for ZIP code 08557?
The primary city for this ZIP code is Sergeantsville, located in NJ.
In which county is 08557 located?
ZIP code 08557 is situated within Hunterdon, NJ.
What are the coordinates for 08557?
The approximate center point is 40.44590 (Latitude) and -74.94350 (Longitude).
Is ZIP code 08557 active?
This page lists ZIP 08557 as Listed based on the latest refresh date shown above.
Does ZIP 08557 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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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