Islip, New York Demographics & Population 2026
During the 2020–2024 ACS period, Islip, New York had a total population of 17,362, the 110th largest community in New York, with a median household income of $120,909, which is 41% higher than the state average. The poverty rate is 5.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 41% above the state average — one of the wealthiest communities in New York.
Islip Quick Facts
How Islip 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 | 17,224 | 17,362 | +0.8% |
| Median household income | $122,596 | $120,909 | -1.4% |
| Median home value | $486,900 | $542,200 | +11.4% |
How Islip 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
Moderate diversity with one or two groups making up the majority.
State average: 65 | National average: 61
Education
Educational Attainment (Adults 25+)
Islip Rankings in New York
Explore New York Rankings
Other Cities in Suffolk County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| West Babylon | 43,570 | $129,519 | 5.9% | $531,900 |
| Coram | 39,539 | $105,220 | 7.5% | $452,100 |
| Central Islip | 38,373 | $113,707 | 9.2% | $436,400 |
| Commack | 36,558 | $169,792 | 4.2% | $678,200 |
| Huntington Station | 32,601 | $135,477 | 7.2% | $578,000 |
| Centereach | 31,839 | $132,240 | 5.3% | $514,800 |
| Bay Shore | 31,683 | $105,618 | 10.2% | $492,200 |
| Shirley | 28,375 | $112,788 | 6.5% | $424,900 |
| Deer Park | 27,990 | $137,105 | 3.4% | $543,500 |
| Lindenhurst | 27,142 | $130,128 | 5.7% | $521,500 |
Cities Similar to Islip
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Bethpage | 17,123 | $122,257 | $605,900 | 43.4% | 5.6% |
| Kings Park | 16,516 | $121,136 | $619,000 | 49.7% | 2.4% |
| Mastic Beach | 16,735 | $111,493 | $357,200 | 24.5% | 21.2% |
| Ronkonkoma | 18,709 | $121,673 | $489,100 | 33.5% | 3.3% |
| Farmingville | 16,160 | $127,988 | $472,100 | 30.4% | 6.2% |
Population Overview
Islip is a small city located in New York, within Suffolk County. The total population is 17,362. It ranks as the 110th most populous out of 1,289 Census-designated places in New York.
Age Demographics
The median age in Islip is 43.9 years. This is 10% higher than the state median of 39.8 years.
Economy, Income & Housing
The median household income in Islip is $120,909. This is 41% higher than the state median of $85,974. It is also 50% higher than the national median of $80,734. The poverty rate stands at 5.7%. This is 59% lower than the state poverty rate of 14.0%. The unemployment rate is 5.8%. This is 10% lower than the state rate of 6.4%. The median home value is $542,200. Housing costs are 28% higher than the state median of $423,800. The home-value-to-income ratio is 4.5x. 84.9% of occupied housing units are owner-occupied. This homeownership rate is 56% higher than the state average of 54.4%.
Race & Ethnicity
The largest racial or ethnic group in Islip is White (non-Hispanic), making up 68.3% of the population. Hispanic or Latino residents account for 20.9%. The Black or African American population (3.1%) is well below the state average of 13.4%.
Education
34.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 15% lower than the state rate of 40.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 86.6%.
Data Sources & Methodology
All demographic data for Islip, New York 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 York state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,289 Census-designated places in New York. 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 Islip, New York?
Islip, New York has a population of 17,362 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Islip, NY?
The median household income in Islip is $120,909, which is 50% higher than the national median of $80,734.
What is the poverty rate in Islip, NY?
The poverty rate in Islip is 5.7%. This means approximately 988 residents live below the federal poverty line.
What is the racial makeup of Islip, New York?
Islip's population is 68.3% White, 3.1% Black, 20.9% Hispanic/Latino, and 5.5% Asian.
What is the median home value in Islip, NY?
The median home value in Islip is $542,200. The home-value-to-income ratio is 4.5x.
How educated is Islip, New York?
34.3% of adults (25+) in Islip hold a bachelor's degree or higher, and 13.1% hold a graduate or professional degree.