In which county is ZIP code 11901 located?

ZIP 11901 is listed under Suffolk, NY.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 11901: Riverhead, NY

ZIP: 11901

County: Suffolk

Coordinates: 40.92620, -72.65200

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Explore detailed information for ZIP code 11901 in Riverhead, NY. We include verified county details for Suffolk plus key geographic references used for mapping and logistics.

Primary City	Riverhead
ZIP Code	11901
County	Suffolk
State	NY
Latitude / Longitude	40.92620, -72.65200
ZIP Type	Standard
Time Zone	Eastern Time (ET)
Data Updated	2026-01-08

Maps & Useful Links

Open in Maps: Google Maps · OpenStreetMap

These links show the approximate center point for ZIP 11901 (not an exact boundary).

Geographic & Administrative Context

Coordinates for 11901 are listed as 40.92620 / -72.65200, useful for GPS and service checks in and around Riverhead, NY.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 11901 for mail delivery and general location reference in Suffolk, NY.

Some addresses near Riverhead may share this ZIP due to delivery routing and local service areas.

Related ZIP Codes (Nearby)

Explore other postal codes near Riverhead within NY.

Frequently Asked Questions

What is the primary city for ZIP code 11901?

The primary city for this ZIP code is Riverhead, located in NY.

In which county is 11901 located?

ZIP code 11901 is situated within Suffolk, NY.

What are the coordinates for 11901?

The approximate center point is 40.92620 (Latitude) and -72.65200 (Longitude).

Is ZIP code 11901 active?

This page lists ZIP 11901 as Listed based on the latest refresh date shown above.

Does ZIP 11901 cover multiple areas?

Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.

Methodology & Data Notes

How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.

Page updated: 2026-01-08