Unified School District · NY
Islip Union Free School District
Islip Union Free School District is a unified school district in New York with a community population of 18,758. The median household income is $120,625 and the median age is 43.8.
18,758
Population
3607
People / sq mi
$120,625
Median Income
43.8
Median Age
Islip Union Free School District covers 5 sq mi of land at 3607.3 people per square mile.
Race & Ethnicity
| White | 69.7% |
| Black or African American | 0.1% |
| Asian | 46.6% |
| Hispanic or Latino (any race) | 0.0% |
Economy & Income
$120,625
Median Household Income
$50,896
Per Capita Income
2.7%
Poverty Rate
3.4%
Unemployment
Housing
$548,600
Median Home Value
$2,197
Median Rent
80.3%
Homeownership
Education Attainment
87.4%
High School+
35.8%
Bachelor's+
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State rankings
Frequently Asked Questions
Islip Union Free School District serves a community with a population of 18,758 according to the latest Census ACS 5-Year estimates. This unified school district is located in New York.
The median household income in Islip Union Free School District is $120,625, with a per capita income of $50,896. The poverty rate is 2.7%.
Islip Union Free School District is 69.7% White, 0.1% Black or African American, 46.6% Asian, and 0.0% Hispanic or Latino, per Census ACS data.
In Islip Union Free School District, 87.4% of adults have a high school diploma or higher, and 35.8% hold a bachelor's degree or higher, per Census ACS estimates.
The median home value in Islip Union Free School District is $548,600, with a median rent of $2,197. The homeownership rate is 80.3%.
More from New York
Data for Islip Union Free School District from the American Community Survey 5-Year estimates. Land area from Census Gazetteer files. This is a unified school district (GEOID: 3615540).
The this entity record above pulls directly from the U.S. Census Bureau ACS and decennial files. What follows is the per-entity context — how this entity sits in the broader U.S. population demographics distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the the U.S. Census Bureau ACS and decennial files portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. states, metros, cities, and ZIPs with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: U.S. Census Bureau ACS, 2026.