ZIP Code 11791

11791 is one of New York's ZIP codes, delivering to addresses in Syosset, Nassau County.

City: Syosset
County: Nassau County
State: New York
Prefix: 117xx

Where this code sits

11791 is part of the 117xx range, the group of codes handled by one mail processing centre. Syosset 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 11791 delivers to without sharing its boundary.

ZIP codes nearest 11791

The ZIP codes whose reference points sit closest to 11791.
ZIP code	Distance	Delivers to
ZIP code 11773	0.8 mi	Syosset, NY
ZIP code 11797	1.6 mi	Woodbury, NY
ZIP code 11753	2.4 mi	Jericho, NY
ZIP code 11853	2.5 mi	Jericho, NY
ZIP code 11803	2.7 mi	Plainview, NY
ZIP code 11732	2.8 mi	East Norwich, NY
ZIP code 11802	3.4 mi	Hicksville, NY
ZIP code 11819	3.4 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 11791, plotted from its record coordinates.

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

Scope ZIP code 11791. 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.