Iselin, New Jersey Demographics & Population 2026
During the 2020–2024 ACS period, Iselin, New Jersey had a total population of 19,551, the 60th largest community in New Jersey, with a median household income of $109,500, which is 6% higher than the state average. The poverty rate is 7.9%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Iselin Quick Facts
How Iselin Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 19,151 | 19,551 | +2.1% |
| Median household income | $112,615 | $109,500 | -2.8% |
| Median home value | $394,200 | $426,800 | +8.3% |
How Iselin Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 66 | National average: 61
Education
Educational Attainment (Adults 25+)
Iselin Rankings in New Jersey
Explore New Jersey Rankings
Other Cities in Middlesex County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| New Brunswick | 56,345 | $65,810 | 32.0% | $353,800 |
| Perth Amboy | 55,855 | $61,977 | 20.2% | $370,600 |
| Sayreville | 45,838 | $99,979 | 6.2% | $444,100 |
| Old Bridge | 28,236 | $111,996 | 6.9% | $485,800 |
| Carteret | 25,496 | $96,862 | 8.2% | $405,800 |
| South Plainfield | 24,473 | $130,239 | 3.0% | $470,900 |
| Woodbridge | 20,756 | $104,926 | 11.1% | $390,000 |
| Colonia | 18,587 | $122,713 | 7.4% | $493,100 |
| Avenel | 17,121 | $101,670 | 7.9% | $401,000 |
| South River | 16,124 | $96,147 | 12.5% | $405,200 |
Cities Similar to Iselin
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Hawthorne | 19,628 | $110,237 | $533,700 | 47.0% | 4.0% |
| Point Pleasant | 19,334 | $115,625 | $575,300 | 50.0% | 4.5% |
| Tinton Falls | 19,361 | $117,308 | $478,000 | 54.3% | 6.8% |
| Ocean Acres | 19,204 | $121,924 | $402,500 | 36.3% | 1.9% |
| Woodbridge | 20,756 | $104,926 | $390,000 | 36.2% | 11.1% |
Population Overview
Iselin is a small city located in New Jersey, within Middlesex County. The total population is 19,551. It ranks as the 60th most populous out of 700 Census-designated places in New Jersey.
Age Demographics
The median age in Iselin is 38.5 years. This is 4% lower than the state median of 40.1 years.
Economy, Income & Housing
The median household income in Iselin is $109,500. This is 6% higher than the state median of $103,556. It is also 36% higher than the national median of $80,734. The poverty rate stands at 7.9%. This is 19% lower than the state poverty rate of 9.7%. The unemployment rate is 4.0%. This is 37% lower than the state rate of 6.3%. The median home value is $426,800. Housing costs are 6% lower than the state median of $454,400. The home-value-to-income ratio is 3.9x. 65.3% of occupied housing units are owner-occupied. This homeownership rate is 2% higher than the state average of 63.8%.
Race & Ethnicity
The largest racial or ethnic group in Iselin is Asian, making up 48.3% of the population. White (non-Hispanic) residents account for 23.1%. The White (non-Hispanic) population (23.1%) is well below the state average of 50.9%. The Asian population is significantly higher than the state average (48.3% vs 10.1%).
Education
53.7% of residents aged 25 and older hold a bachelor's degree or higher. This is 23% higher than the state rate of 43.6%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 90.4%. Notably, 24.5% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Iselin, New Jersey is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against New Jersey state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 700 Census-designated places in New Jersey. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Iselin, New Jersey?
Iselin, New Jersey has a population of 19,551 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Iselin, NJ?
The median household income in Iselin is $109,500, which is 36% higher than the national median of $80,734.
What is the poverty rate in Iselin, NJ?
The poverty rate in Iselin is 7.9%. This means approximately 1,538 residents live below the federal poverty line.
What is the racial makeup of Iselin, New Jersey?
Iselin's population is 23.1% White, 10.8% Black, 14.8% Hispanic/Latino, and 48.3% Asian.
What is the median home value in Iselin, NJ?
The median home value in Iselin is $426,800. The home-value-to-income ratio is 3.9x.
How educated is Iselin, New Jersey?
53.7% of adults (25+) in Iselin hold a bachelor's degree or higher, and 24.5% hold a graduate or professional degree.