ZIP code · Syosset · New York · United States
ZIP code 11791 — Syosset
ZIP code 11791 serves Syosset, New York.
- Postal code
- 11791Single source Value from one source, not cross-checked.
- City
- Syosset
- County
- Nassau
- State
- New York
- Country
- United States
- Coordinates
- 40.8146, -73.5024 — precision precise (locality)
View on OpenStreetMap - Population
- 25,194 (ZCTA, ACS 5-year)
- Median household income
- $204,357
- Median age
- 43
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page