Middle Island, NY Profile: Facts, Map & Data


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Middle Island, New York - Basic Facts

The Middle Island Census Designated Place had a population of 10,424 as of July 1, 2016. Middle Island ranks in the upper quartile for 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 Middle Island is located at latitude 40.8925 and longitude -72.9512 in Suffolk County. The formal boundaries for the Middle Island Census Designated Place (see map below) encompass a land area of 8.24 sq. miles and a water area of 0.06 sq. miles. Suffolk County is in the Eastern time zone (GMT -5). The elevation is 82 feet.

The Middle Island Census Designated Place (GNIS ID: 2389478) 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 Middle Island Census Designated Place is located within Town of Brookhaven, a minor civil division (MCD) of Suffolk County.

Beneath the boundary map are tables with Middle Island 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

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting certain data.


Middle Island Census Designated Place, NY Boundary Map

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Middle Island, NY Data & Demographics (As of July 1, 2016)


Total Population 10,424
Population in Households 10,105
Population in Familes 7,980
Population in Group Qrtrs 319
Population Density1 1,265
Diversity Index2 47


Total Households 4,192
Average Household Size 2.41
Family Households 2,671
Average Family Size 3


Total Housing Units 4,518 (100%)
Owner Occupied HU 3,189 (70.6%)
Renter Occupied HU 1,003 (22.2%)
Vacant Housing Units 326 ( 7.2%)
Median Home Value $284,141
Average Home Value $315,146


Median Household Income $64,999
Average Household Income $82,782
Per Capita Income $34,260
  (Compound Annual Growth Rates)


2010-2015 2015-2020
Population -0.09% -0.03%
Households -0.1% -0.04%
Families -0.24% -0.13%
Median Household Income   3.02%
Per Capita Income   1.8%
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.

Middle Island, NY - Peer Comparisons by Rank and Percentile

The table below compares Middle Island 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 # 186 85th
Population Density1 # 620 48th
Diversity Index2 # 256 79th
Median Household Income # 489 59th
Per Capita Income # 465 61st

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