ZIP Code 08557

08557 is one of New Jersey's ZIP codes, delivering to addresses in Sergeantsville, Hunterdon County.

City: Sergeantsville
County: Hunterdon County
State: New Jersey
Prefix: 085xx

Where this code sits

08557 is part of the 085xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Sergeantsville.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 08557 delivers to without sharing its boundary.

ZIP codes nearest 08557

The ZIP codes whose reference points sit closest to 08557.
ZIP code	Distance	Delivers to
ZIP code 08559	0.8 mi	Stockton, NJ
ZIP code 08556	3.0 mi	Rosemont, NJ
ZIP code 08530	5.1 mi	Lambertville, NJ
ZIP code 18963	5.6 mi	Solebury, PA
ZIP code 08551	6.0 mi	Ringoes, NJ
ZIP code 08803	6.2 mi	Baptistown, NJ
ZIP code 18938	6.6 mi	New Hope, PA
ZIP code 18950	6.7 mi	Point Pleasant, PA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 08557, plotted from its record coordinates.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope ZIP code 08557. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.