Syosset, NY 11791 ZIP Code Profile


ZIP Code 11791: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Syosset, NY 11791

Not Acceptable, USPS
Laurel Hollow, NY 11791
Muttontown, NY 11791
Oyster Bay Cove, NY 11791

  • ZIP Code Type: STANDARD
  • County: Nassau County
  • Centroid: Latitude 40.814, Longitude -73.503
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 1,190
  • PO Box Addresses: 284
  • Residential Addresses: 8,080
    • Multi-Family Addresses: 93
    • Single Family Addresses: 7,987

The ZIP Code maps and database are updated 4 times per year.
Database updated: May 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

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11791 ZIP Code Map

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Syosset, NY 11791 Data & Demographics (As of July 1, 2017)


Total Population 25,865
Daytime Population: Workers 16,384
Daytime Population: Residents 13,289
Total Daytime Population (TDP) 29,673
Ratio TDP/Total Population1 1.15
Population in Households 25,574
Population in Familes 23,812
Population in Group Qrtrs 291
Population Density2 2,052
Diversity Index3 51


Median Household Income $151,606
Average Household Income $213,151
Per Capita Income $68,384


Total Housing Units 8,529 (100%)
Owner Occupied HU 7,581 (88.9%)
Renter Occupied HU 674 ( 7.9%)
Vacant Housing Units 274 ( 3.2%)
Median Home Value $697,489
Average Home Value $775,650


Total Households 8,255
Average Household Size 3.1
Family Households 7,000
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population 0.21% 0.26%
Households 0.06% 0.15%
Families -0.02% 0.1%
Median Household Income   0.91%
Per Capita Income   1.56%

Syosset, NY 11791 - Peer Comparisons by Rank and Percentile

The table below compares 11791 to the other 1,745 ZIP Codes in New York by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 262 85th
Population Density # 437 75th
Diversity Index # 375 79th
Median Household Income # 38 98th
Per Capita Income # 81 95th

Additional comparisons and rankings can be made with a VERY EASY TO USE New York Census Data Comparison Tool.

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