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 28,371 as of July 1, 2017. 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, 2017.

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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, 2017)


Total Population 28,371
Daytime Population: Workers 8,572
Daytime Population: Residents 13,487
Total Daytime Population (TDP) 22,059
Ratio TDP/Total Population1 0.78
Population in Households 27,963
Population in Familes 25,525
Population in Group Qrtrs 408
Population Density2 4,487
Diversity Index3 23


Median Household Income $110,154
Average Household Income $139,362
Per Capita Income $44,689


Total Housing Units 9,344 (100%)
Owner Occupied HU 8,260 (88.4%)
Renter Occupied HU 745 ( 8.0%)
Vacant Housing Units 339 ( 3.6%)
Median Home Value $439,074
Average Home Value $513,702


Total Households 9,005
Average Household Size 3.11
Family Households 7,385
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 0.02% 0.15%
Households -0.05% 0.09%
Families -0.14% 0.04%
Median Household Income   1.33%
Per Capita Income   2.08%

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, 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 # 48 96th
Population Density # 163 86th
Diversity Index # 608 49th
Median Household Income # 159 87th
Per Capita Income # 265 78th

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

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