Selden, NY Profile: Facts & Data


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Selden, New York - Basic Facts

The Selden Census Designated Place had a population of 19,567 as of July 1, 2018. Selden 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 Selden is located at latitude 40.8665 and longitude -73.0357 in Suffolk County. The formal boundaries for the Selden Census Designated Place (see map below) encompass a land area of 4.32 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 Selden Census Designated Place (GNIS ID: 2390271) 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 Selden Census Designated Place is located within Town of Brookhaven, a minor civil division (MCD) of Suffolk County.

Alternate Unofficial Names for Selden: Westfield.

Jump to... (On This Page!)
  1. Selden 2018 Demographic Data
  2. Growth Rates for Selden (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 - 2018 Demographics

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Boundary Maps, Demographic Data, School Zones Review maps and data for the neighborhood, city, county, ZIP Code, and school zone. July 1, 2018, data includes home values, household income, percentage of homes owned, rented or vacant, etc.


Selden, NY Data & Demographics (As of July 1, 2018)


Total Population 19,567
Population in Households 19,540
Population in Familes 16,886
Population in Group Qrtrs 27
Population Density2 4,528
Diversity Index3 53


Median Household Income $86,410
Average Household Income $99,873
Per Capita Income $32,246


Total Housing Units 6,751 (100%)
Owner Occupied HU 4,910 (72.7%)
Renter Occupied HU 1,399 (20.7%)
Vacant Housing Units 442 ( 6.5%)
Median Home Value $331,464
Average Home Value $361,965


Total Households 6,309
Average Household Size 3.1
Family Households 4,802
Average Family Size 4
  1. Demographics are point estimates for July 1st of the current year and each for the forecast years. See References for more information.
  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.


2010-2018 2018-2023
Population -0.17% -0.05%
Households -0.26% -0.12%
Families -0.36% -0.18%
Median Household Income   1.94%
Per Capita Income   2.76%

Selden, NY - Peer Comparisons by Rank and Percentile

The table below compares Selden to the other 1,196 incorporated cities, towns and CDPs in New York by rank and percentile using July 1, 2018 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 # 89 93rd
Population Density # 157 87th
Diversity Index # 216 82nd
Median Household Income # 363 70th
Per Capita Income # 609 49th

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