ZIP Code 08561

08561 is one of New Jersey's ZIP codes, delivering to addresses in Windsor, Mercer County.

City: Windsor
County: Mercer County
State: New Jersey
Prefix: 085xx

Where this code sits

08561 is part of the 085xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Windsor.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 08561 delivers to without sharing its boundary.

ZIP codes nearest 08561

The ZIP codes whose reference points sit closest to 08561.
ZIP code	Distance	Delivers to
ZIP code 08691	1.8 mi	Trenton, NJ
ZIP code 08520	3.3 mi	Hightstown, NJ
ZIP code 08550	4.2 mi	Princeton Junction, NJ
ZIP code 08690	4.2 mi	Trenton, NJ
ZIP code 08555	5.7 mi	Roosevelt, NJ
ZIP code 08512	5.7 mi	Cranbury, NJ
ZIP code 08501	5.8 mi	Allentown, NJ
ZIP code 08619	6.2 mi	Trenton, 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 08561, plotted from its record coordinates.

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

Scope ZIP code 08561. 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.