Iselin is a city of 19,551 people in New Jersey. 50% of residents were born outside the United States. 54% of adults hold a bachelor's degree, against 36% nationally. Few US cities rank higher on income. Density works out to 6,203 people per square mile. Renters pay $2,113 a month at the median.
At a glance
Wealthier
median household income $109,500, above the US median
US median: $82,259
Mid-age
median age 38.5
US median: 38.9
More educated
54% hold a bachelor's degree
US average: 36%
Less affordable
home values up 57%, inflation adjusted
US median home: $376,019
Unique to this place
What stands out about Iselin
What changed most since 1990
White share85.3% → 23.1%(−62.2 pts)US over the same years: −17.8 pts
Asian share7.7% → 48.3%(+40.6 pts)US over the same years: +3.1 pts
Adults with a bachelor's degree23.1% → 53.7%(+30.6 pts)US over the same years: +15.3 pts
Iselin's population equals 2.2% of Middlesex County's. Its number of households without a car equals 1.1% of the county's. Its number of foreign-born residents equals 3.2% of the county's.
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans
Veterans by period of service, 2024
Gulf War (2001 or later)33.6%(115)
US avg: 26.4%
Gulf War (1990s)0%(0)
US avg: 24.3%
Vietnam era26.9%(92)
US avg: 33.1%
Korean War0%(0)
US avg: 4.5%
World War II0.9%(3)
US avg: 1%
Share of the 342 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Over time
Iselin, decade by decade
Iselin population, inflation-adjusted income and home value, education, and diversity by year
Year
Population
Median household income
Median home value
Bachelor's degree+
Diversity score
1990
16,141
$113,480
$375,131
23.1%
32.9
2000
16,698
$119,180
$271,791
32.4%
69.1
2010
18,695
$126,994
$491,991
39.2%
79.8
2020
20,088
$122,884
$383,368
50.1%
74.8
2024
19,551
$109,500
$426,800
53.7%
84.9
Census years come from the decennial census and the latest year from the American Community Survey, so part of any change between those two rows can reflect the different surveys. Dollar figures are adjusted for inflation to 2024 dollars; a figure ending in "+" was at the Census Bureau's reporting cap that year. The diversity score runs from 0 to 100; see how it's calculated.
