ZIP Code 11556

11556 is one of New York's ZIP codes, delivering to addresses in Uniondale, Nassau County.

City: Uniondale
County: Nassau County
State: New York
Prefix: 115xx

Where this code sits

11556 is part of the 115xx range, the group of codes handled by one mail processing centre. Uniondale is served by 3 ZIP codes in total.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 11556 delivers to without sharing its boundary.

ZIP codes nearest 11556

The ZIP codes whose reference points sit closest to 11556.
ZIP code	Distance	Delivers to
ZIP code 11022	0.0 mi	Great Neck, NY
ZIP code 11026	0.0 mi	Great Neck, NY
ZIP code 11051	0.0 mi	Port Washington, NY
ZIP code 11052	0.0 mi	Port Washington, NY
ZIP code 11053	0.0 mi	Port Washington, NY
ZIP code 11054	0.0 mi	Port Washington, NY
ZIP code 11055	0.0 mi	Port Washington, NY
ZIP code 11815	0.0 mi	Hicksville, 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 11556, plotted from its record coordinates.

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

Scope ZIP code 11556. 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.