ZIP Code 11731

11731 is one of New York's ZIP codes, delivering to addresses in East Northport, Suffolk County.

City: East Northport
County: Suffolk County
State: New York
Prefix: 117xx

Where this code sits

11731 is part of the 117xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to East Northport.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 11731 delivers to without sharing its boundary.

ZIP codes nearest 11731

The ZIP codes whose reference points sit closest to 11731.
ZIP code	Distance	Delivers to
ZIP code 11725	2.1 mi	Commack, NY
ZIP code 11740	2.6 mi	Greenlawn, NY
ZIP code 11768	3.4 mi	Northport, NY
ZIP code 11746	3.9 mi	Huntington Station, NY
ZIP code 11721	4.0 mi	Centerport, NY
ZIP code 11754	4.2 mi	Kings Park, NY
ZIP code 11743	5.0 mi	Huntington, NY
ZIP code 11787	5.3 mi	Smithtown, 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 11731, plotted from its record coordinates.

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

Scope ZIP code 11731. 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.