Home > NY > Nassau County > Syosset > Zip 11791

Zip Code 11791 — Syosset, NY

11791 is a ZIP Code associated with Syosset, NY, located within Nassau. The postal region supports an estimated population of 25,520 residents across Data Pending housing units, with a population density of 787.4 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.828190, -73.502820)

Data MetricLocal Statistic
Postal / Zip Code11791
Primary CitySyosset
State / ProvinceNY
CountyNassau
Total Population25,520
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density787.4 people/sq mi
TimezoneAmerica/New_York

How 11791 Compares

MetricZIP 11791Nassau CountyNY State Average
Population25,5201,369,35919,771,902
Median IncomeData PendingN/AN/A
Population Density787.4 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 11797Woodbury1.9 mi9,402N/A
Zip 11732East Norwich2.1 mi3,228N/A
Zip 11771Oyster Bay3.0 mi10,908N/A
Zip 11753Jericho3.3 mi12,435N/A
Zip 11803Plainview3.6 mi29,713N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →