West Sayville, NY Profile: Facts, Map & Data


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West Sayville, New York - Basic Facts

The West Sayville Census Designated Place had a population of 5,049 as of July 1, 2017.

The primary coordinate point for West Sayville is located at latitude 40.7297 and longitude -73.1052 in Suffolk County. The formal boundaries for the West Sayville Census Designated Place (see map below) encompass a land area of 1.92 sq. miles and a water area of 0.2 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 13 feet.

The West Sayville Census Designated Place (GNIS ID: 2390490) has a U1 Census Class Code which indicates a census designated place with an official federally recognized name. It also has a Functional Status Code of "S" which identifies a statistical entity.

The West Sayville Census Designated Place is located within Town of Islip, a minor civil division (MCD) of Suffolk County.

Beneath the boundary map are tables with West Sayville population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2017.

Neighborhood Data

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West Sayville Census Designated Place, NY Boundary Map

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Boundary Maps: Town of Islip | Suffolk County | New York Counties

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West Sayville, NY Data & Demographics (As of July 1, 2017)


Total Population 5,049
Daytime Population: Workers 1,117
Daytime Population: Residents 2,660
Total Daytime Population (TDP) 3,777
Ratio TDP/Total Population1 0.75
Population in Households 4,966
Population in Familes 4,349
Population in Group Qrtrs 83
Population Density2 2,624
Diversity Index3 17


Median Household Income $99,416
Average Household Income $122,681
Per Capita Income $43,747


Total Housing Units 2,156 (100%)
Owner Occupied HU 1,473 (68.3%)
Renter Occupied HU 306 (14.2%)
Vacant Housing Units 377 (17.5%)
Median Home Value $405,055
Average Home Value $415,784


Total Households 1,779
Average Household Size 2.79
Family Households 1,309
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 0.1% 0.21%
Households 0.06% 0.17%
Families -0.05% 0.09%
Median Household Income   1.71%
Per Capita Income   2.45%

West Sayville, NY - Peer Comparisons by Rank and Percentile

The table below compares West Sayville to the other 1,196 incorporated cities, towns and CDPs 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 # 347 71st
Population Density # 330 72nd
Diversity Index # 755 37th
Median Household Income # 243 80th
Per Capita Income # 291 76th

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

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