ZIP Code 12542

12542 is one of New York's ZIP codes, delivering to addresses in Marlboro, Ulster County.

City: Marlboro
County: Ulster County
State: New York
Prefix: 125xx

Where this code sits

12542 is part of the 125xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Marlboro.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 12542 delivers to without sharing its boundary.

ZIP codes nearest 12542

The ZIP codes whose reference points sit closest to 12542.
ZIP code	Distance	Delivers to
ZIP code 12537	3.1 mi	Hughsonville, NY
ZIP code 12547	3.4 mi	Milton, NY
ZIP code 12512	3.8 mi	Chelsea, NY
ZIP code 12511	4.4 mi	Castle Point, NY
ZIP code 12590	5.2 mi	Wappingers Falls, NY
ZIP code 12568	5.3 mi	Plattekill, NY
ZIP code 12550	5.8 mi	Newburgh, NY
ZIP code 12515	5.9 mi	Clintondale, NY

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 12542, plotted from its record coordinates.

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

Scope ZIP code 12542. 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.