ZIP Code 10503

10503 is one of New York's ZIP codes, delivering to addresses in Ardsley On Hudson, Westchester County.

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

Where this code sits

10503 is part of the 105xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ardsley On Hudson.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 10503 delivers to without sharing its boundary.

914 Area code 914

ZIP codes nearest 10503

The ZIP codes whose reference points sit closest to 10503.
ZIP code	Distance	Delivers to
ZIP code 10522	1.0 mi	Dobbs Ferry, NY
ZIP code 10533	1.1 mi	Irvington, NY
ZIP code 10502	1.9 mi	Ardsley, NY
ZIP code 10968	2.6 mi	Piermont, NY
ZIP code 10976	2.7 mi	Sparkill, NY
ZIP code 10706	2.7 mi	Hastings On Hudson, NY
ZIP code 10964	3.0 mi	Palisades, NY
ZIP code 10607	3.3 mi	White Plains, 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 10503, plotted from its record coordinates.

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

Scope ZIP code 10503. 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.