Iselin, NJ Profile: Facts, Map & Data


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Iselin, New Jersey - Basic Facts

The Iselin Census Designated Place had a population of 19,556 as of July 1, 2017. Iselin 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 Jersey. See peer rankings below.

The primary coordinate point for Iselin is located at latitude 40.5693 and longitude -74.3211 in Middlesex County. The formal boundaries for the Iselin Census Designated Place (see map below) encompass a land area of 3.19 sq. miles and a water area of 0 sq. miles. Middlesex County is in the Eastern time zone (GMT -5). The elevation is 66 feet.

The Iselin Census Designated Place (GNIS ID: 2389973) 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 Iselin Census Designated Place is located within Township of Woodbridge, a minor civil division (MCD) of Middlesex County.

Beneath the boundary map are tables with Iselin 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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Iselin Census Designated Place, NJ Boundary Map

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Boundary Maps: Township of Woodbridge | Middlesex County | New Jersey Counties

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Iselin, NJ Data & Demographics (As of July 1, 2017)


Total Population 19,556
Daytime Population: Workers 12,732
Daytime Population: Residents 9,816
Total Daytime Population (TDP) 22,548
Ratio TDP/Total Population1 1.15
Population in Households 19,552
Population in Familes 17,346
Population in Group Qrtrs 4
Population Density2 6,131
Diversity Index3 67


Median Household Income $87,502
Average Household Income $104,188
Per Capita Income $35,455


Total Housing Units 6,915 (100%)
Owner Occupied HU 4,236 (61.3%)
Renter Occupied HU 2,392 (34.6%)
Vacant Housing Units 287 ( 4.2%)
Median Home Value $321,987
Average Home Value $326,953


Total Households 6,628
Average Household Size 2.95
Family Households 5,021
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 0.62% 0.62%
Households 0.39% 0.48%
Families 0.36% 0.49%
Median Household Income   2.54%
Per Capita Income   2.68%

Iselin, NJ - Peer Comparisons by Rank and Percentile

The table below compares Iselin to the other 545 incorporated cities, towns and CDPs in New Jersey 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 # 52 91st
Population Density # 78 86th
Diversity Index # 113 79th
Median Household Income # 201 63rd
Per Capita Income # 320 41st

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

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