ZIP Code 10521

10521 is one of New York's ZIP codes, delivering to addresses in Croton On Hudson, Westchester County.

City: Croton On Hudson
County: Westchester County
State: New York
Prefix: 105xx

Where this code sits

10521 is part of the 105xx range, the group of codes handled by one mail processing centre. Croton On Hudson is served by 2 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 10521 delivers to without sharing its boundary.

914 Area code 914

ZIP codes nearest 10521

The ZIP codes whose reference points sit closest to 10521.
ZIP code	Distance	Delivers to
ZIP code 10548	1.4 mi	Montrose, NY
ZIP code 10511	1.8 mi	Buchanan, NY
ZIP code 10520	2.1 mi	Croton On Hudson, NY
ZIP code 10596	2.2 mi	Verplanck, NY
ZIP code 10993	3.4 mi	West Haverstraw, NY
ZIP code 10927	3.4 mi	Haverstraw, NY
ZIP code 10980	3.7 mi	Stony Point, NY
ZIP code 10986	3.7 mi	Tomkins Cove, 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 10521, plotted from its record coordinates.

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

Scope ZIP code 10521. 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.