ZIP Code 11742

11742 is one of New York's ZIP codes, delivering to addresses in Holtsville, Suffolk County.

City: Holtsville
County: Suffolk County
State: New York
Prefix: 117xx

Where this code sits

11742 is part of the 117xx range, the group of codes handled by one mail processing centre. Holtsville 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 11742 delivers to without sharing its boundary.

ZIP codes nearest 11742

The ZIP codes whose reference points sit closest to 11742.
ZIP code	Distance	Delivers to
ZIP code 00501	0.4 mi	Holtsville, NY
ZIP code 00544	0.4 mi	Holtsville, NY
ZIP code 11738	1.8 mi	Farmingville, NY
ZIP code 11741	1.9 mi	Holbrook, NY
ZIP code 11763	3.0 mi	Medford, NY
ZIP code 11784	4.1 mi	Selden, NY
ZIP code 11715	4.2 mi	Blue Point, NY
ZIP code 11772	4.5 mi	Patchogue, 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 11742, plotted from its record coordinates.

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

Scope ZIP code 11742. 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.