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ZIP Code Database - Facts & Stats

Data Last Updated: January 1, 2023

ZIP Codes for City of Syosset, NY

Syosset, NY Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 11791StandardNassau25,076

Timezone(s):Eastern (GMT -05:00)
Counties:NASSAU, NY
Population:18,829 (More Details)
Male Population:9,335
Female Population:9,494
Median Age:43
ZIP Codes:1
Area Codes:1
Total Area:453 square miles (county)
Land Area:285 square miles (county)
Water Area:169 square miles (county)

Syosset, NY Demographic Information *

Total population18,829
Male population9,335
Female population9,494
Median age (years)43
White Population14,016
Black Population156
Indian Population19
Asian Population4,175
Hawaiian Population2
Hispanic Population775
Median age (Male)41.6
Median age (Female)44.2
Total households6,188
Family households (families)5,236
Average household size3
Average family size3.31
Total housing units6,339
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 1/1/2023],
  2. Internal Data Creation [Last Updated: 1/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],