Islandia, NY Profile: Facts & Data


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Islandia, New York - Basic Facts

The Village of Islandia had a population of 3,821 as of July 1, 2023. Islandia 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 Islandia is located at latitude 40.8043 and longitude -73.169 in Suffolk County. The formal boundaries for the Village of Islandia encompass a land area of 2.22 sq. miles and a water area of 0 sq. miles. Suffolk County is in the Eastern time zone (GMT -5).

The Village of Islandia has a C1 Census Class Code which indicates an active incorporated place that does not serve as a county subdivision equivalent. It also has a Functional Status Code of "A" which identifies an active government providing primary general-purpose functions.

The Village of Islandia is located within Town of Islip, a minor civil division (MCD) of Suffolk County.

Jump to... (On This Page!)
  1. Islandia 2023 Demographic Data
  2. Growth Rates for Islandia (Historical & 5-Year Forecast)
  3. Peer Comparisons (Rank and Percentile)
  1. Neighborhoods Demographics (Home Values, Household Income, etc.)
  2. New York Research Tools (Easy Tools & Current Data)
  3. New York Data Comparison Tool - 2023 Demographics

Islandia, NY Data & Demographics (As of July 1, 2023)


Total Population 3,821 (100%)
Population in Households 3,386 (88.6%)
Population in Families 2,783 (72.8%)
Population in Group Quarters1 435 (11.4%)
Population Density 1,726
Diversity Index2 81


Median Household Income $98,168
Average Household Income $132,121
% of Income for Mortgage4 27%
Per Capita Income $39,893
Wealth Index5 161
Socioeconomic Status Index6 Moderate (51.7)


Total HU (Housing Units) 1,114 (100%)
Owner Occupied HU 979 (87.9%)
Renter Occupied HU 89 ( 8.0%)
Vacant Housing Units 46 ( 4.1%)
Median Home Value $443,627
Average Home Value $479,060
Housing Affordability Index3 73


Total Households 1,068
Average Household Size 3.17
Family Households 741
Average Family Size 4.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. 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 races 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.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population 2.14% 0.13%
Households 0.70% 0.41%
Families   0.38%
Median Household Income   1.61%
Per Capita Income   2.68%
Owner Occupied HU   0.51%

Islandia, NY - Peer Comparisons by Rank and Percentile

The table below compares Islandia to the other 1,293 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2023 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 # 430 67th
Population Density # 481 63rd
Median Household Income # 397 69th
Housing Affordability Index # 309 24th
Per Capita Income # 720 44th
Diversity Index # 60 95th

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

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