In which county is ZIP code 11791 located?

ZIP 11791 is listed under Nassau, NY.

When was this page updated?

This page was updated on 2026-01-08.

ZIP Code 11791: Syosset, NY

ZIP: 11791

County: Nassau

Coordinates: 40.81460, -73.50240

ZIP Type: Standard

Time Zone: Eastern Time (ET)

Get a reliable snapshot of the Syosset, NY postal area 11791. This page summarizes county, coordinates, and local facts to help with services and location research.

Primary City	Syosset
ZIP Code	11791
County	Nassau
State	NY
Latitude / Longitude	40.81460, -73.50240
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 11791 (not an exact boundary).

Geographic & Administrative Context

For mapping and verification, 11791 is commonly represented around 40.81460, -73.50240. These coordinates help identify the general area within Nassau, NY.

Local Coverage Notes

ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 11791 for mail delivery and general location reference in Nassau, NY.

This ZIP may extend beyond the city core into nearby communities within Nassau.

Related ZIP Codes (Nearby)

Explore other postal codes near Syosset within NY.

Frequently Asked Questions

What is the primary city for ZIP code 11791?

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

In which county is 11791 located?

ZIP code 11791 is situated within Nassau, NY.

What are the coordinates for 11791?

The approximate center point is 40.81460 (Latitude) and -73.50240 (Longitude).

Is ZIP code 11791 active?

This page lists ZIP 11791 as Listed based on the latest refresh date shown above.

Does ZIP 11791 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