Central Islip, NY Profile: Facts, Map & Data


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Central Islip, New York - Basic Facts

The Central Islip Census Designated Place had a population of 34,486 as of July 1, 2015. Central Islip ranks in the upper quartile for Population Density and Diversity Index when compared to the other cities, towns and Census Designated Places (CDPs) in New York. See peer rankings below.

The primary coordinate point for Central Islip is located at latitude 40.7838 and longitude -73.1945 in Suffolk County. The formal boundaries for the Central Islip Census Designated Place (see map below) encompass a land area of 7.11 sq. miles and a water area of 0 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 89 feet.

The Central Islip Census Designated Place (GNIS ID: 2389298) 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 Central 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 Central Islip population, income and housing data, five-year growth projections and peer comparisons for key demographic data. The estimates are for July 1, 2015.

Neighborhood Data

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Central Islip Census Designated Place, NY Boundary Map

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Central Islip, NY Data & Demographics (As of July 1, 2015)


Total Population 34,486
Population in Households 34,281
Population in Familes 27,393
Population in Group Qrtrs 205
Population Density1 4,850
Diversity Index2 88


Total Households 9,429
Average Household Size 3.64
Family Households 6,901
Average Family Size 4


Total Housing Units 10,178 (100%)
Owner Occupied HU 6,352 (62.4%)
Renter Occupied HU 3,077 (30.2%)
Vacant Housing Units 749 ( 7.4%)
Median Home Value $295,321
Average Home Value $458,885


Median Household Income $71,605
Average Household Income $82,760
Per Capita Income $22,698
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population 0.02% 0.02%
Households 0.13% 0.11%
Families -0.07% -0.02%
Median Household Income   1.84%
Per Capita Income   2.14%
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.


Central Islip, NY - Peer Comparisons by Rank and Percentile

The table below compares Central Islip to the other 1,189 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2015 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 # 30 98th
Population Density1 # 141 88th
Diversity Index2 # 4 100th
Median Household Income # 454 62nd
Per Capita Income # 936 21st

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