West Islip, NY Profile: Facts, Map & Data


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West Islip, New York - Basic Facts

The West Islip Census Designated Place had a population of 28,344 as of July 1, 2016. West Islip ranks in the upper quartile for Population Density when compared to the other cities, towns and Census Designated Places (CDPs) in New York. See peer rankings below.

The primary coordinate point for West Islip is located at latitude 40.7099 and longitude -73.2961 in Suffolk County. The formal boundaries for the West Islip Census Designated Place (see map below) encompass a land area of 6.32 sq. miles and a water area of 0.44 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 20 feet.

The West Islip Census Designated Place (GNIS ID: 2390479) 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 Islip 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 Islip population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2016.

Neighborhood Data

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West Islip Census Designated Place, NY Boundary Map

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West Islip, NY Data & Demographics (As of July 1, 2016)


Total Population 28,344
Population in Households 27,931
Population in Familes 25,514
Population in Group Qrtrs 413
Population Density1 4,483
Diversity Index2 22


Total Households 9,060
Average Household Size 3.08
Family Households 7,440
Average Family Size 3


Total Housing Units 9,374 (100%)
Owner Occupied HU 8,301 (88.6%)
Renter Occupied HU 759 ( 8.1%)
Vacant Housing Units 314 ( 3.3%)
Median Home Value $436,130
Average Home Value $501,343


Median Household Income $107,265
Average Household Income $134,033
Per Capita Income $43,305
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.01% 0.09%
Households 0.04% 0.1%
Families -0.04% 0.05%
Median Household Income   1.0%
Per Capita Income   1.5%
1) Population Density = Total Population per square mile.
2) The Diversity Index is a scale of 0 to 100 that represents the likelyhood 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.
Based on Census 2010 counts, the Diversity Index for the United States was 60.6 and it is expected to increase to 64.8 by July 1, 2018.

West Islip, NY - Peer Comparisons by Rank and Percentile

The table below compares West Islip to the other 1,196 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2016 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 # 49 96th
Population Density1 # 159 87th
Diversity Index2 # 609 49th
Median Household Income # 153 87th
Per Capita Income # 257 79th

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

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