ZIP Code 11901

11901 is one of New York's ZIP codes, delivering to addresses in Riverhead, Suffolk County.

City: Riverhead
County: Suffolk County
State: New York
Prefix: 119xx

Where this code sits

11901 is part of the 119xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Riverhead.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 11901 delivers to without sharing its boundary.

ZIP codes nearest 11901

The ZIP codes whose reference points sit closest to 11901.
ZIP code	Distance	Delivers to
ZIP code 11931	1.8 mi	Aquebogue, NY
ZIP code 11970	4.0 mi	South Jamesport, NY
ZIP code 11947	4.0 mi	Jamesport, NY
ZIP code 11933	4.7 mi	Calverton, NY
ZIP code 11948	5.9 mi	Laurel, NY
ZIP code 11978	6.7 mi	Westhampton Beach, NY
ZIP code 11942	6.8 mi	East Quogue, NY
ZIP code 11977	7.5 mi	Westhampton, 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 11901, plotted from its record coordinates.

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

Scope ZIP code 11901. 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.