ZIP Code 08504

08504 is one of New Jersey's ZIP codes, delivering to addresses in Blawenburg, Somerset County.

City: Blawenburg
County: Somerset County
State: New Jersey
Prefix: 085xx

Where this code sits

08504 is part of the 085xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Blawenburg.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 08504 delivers to without sharing its boundary.

ZIP codes nearest 08504

The ZIP codes whose reference points sit closest to 08504.
ZIP code	Distance	Delivers to
ZIP code 08558	0.8 mi	Skillman, NJ
ZIP code 08553	3.3 mi	Rocky Hill, NJ
ZIP code 08502	3.7 mi	Belle Mead, NJ
ZIP code 08525	3.8 mi	Hopewell, NJ
ZIP code 08540	4.3 mi	Princeton, NJ
ZIP code 08542	4.4 mi	Princeton, NJ
ZIP code 08541	4.7 mi	Princeton, NJ
ZIP code 08544	4.8 mi	Princeton, NJ

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 08504, plotted from its record coordinates.

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

Scope ZIP code 08504. 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.