Islip, New York Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Islip, New York is 17,224 as of the 2023 American Community Survey, making it the 111th-largest city in New York. The median household income is $122,596, the median home value is $486,900, and the median age is 44.0.
17,224
Population
3627
People / sq mi
$122,596
Median Income
$486,900
Median Home Value
Get Islip's next ACS population data
Subscribe for Population Review updates by email. No spam, unsubscribe anytime.
Islip covers 4.7 sq mi of land at 3627 people per square mile.
About Islip, NY
Islip is distinguished by its share of foreign-born residents, 6.6% of the population. With 17,224 residents, Islip is a city in New York.
Households take in a median $122,596, comfortably above the US median of $78,538. Only 3.4% of residents live in poverty, below the national 12.4%. A typical home is worth $486,900, with typical rent around $2,192.
35.0% of adults 25 and older hold a bachelor’s degree, near the national average of 35.0%. Most workers commute: only 8.2% work from home, below the national 14.0%, and the average commute runs about 29 minutes each way.
Race & Ethnicity
| White | 73.7% |
| Black or African American | 3.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.6% |
| Two or More Races | 0.0% |
Economy & Income
$122,596
Median Household Income
$49,289
Per Capita Income
3.4%
Poverty Rate
3.3%
Unemployment Rate
Housing
$486,900
Median Home Value
$2,192
Median Rent
84.5%
Owner-Occupied
Education
87.0%
High School+
35.0%
Bachelor's+
Commute
3.6%
Drive Alone
78.5%
Public Transit
8.2%
Work From Home
29.1 min
Avg Commute
Community Profile
6.6%
Foreign Born
83.1%
Non-English at Home
3.7%
Veterans
11.9%
With Disability
96.4%
Health Insurance
90.9%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 27.0% |
| Finance, Insurance & Real Estate | 14.3% |
| Construction | 6.9% |
| Manufacturing | 6.6% |
| Retail Trade | 6.2% |
| Information | 5.5% |
| Arts, Entertainment & Food Services | 5.2% |
| Public Administration | 5.0% |
| Education, Health Care & Social Services | 4.9% |
| Transportation & Warehousing | 1.7% |
| Agriculture & Mining | 0.1% |
Largest cities in New York
Largest counties in New York
Part of New York
Metro areas in New York
City rankings
Frequently Asked Questions
Islip, New York has a population of 17,224 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 111th-largest city in New York.
The median household income in Islip, New York is $122,596, with 3.4% of residents living below the federal poverty level.
The median home value in Islip, New York is $486,900, with median monthly rent at $2,192 and a homeownership rate of 84.5%.
The median age in Islip, New York is 44.0 years. The population is 49.8% male and 50.2% female.
Islip Cdp, NY Climate
Islip Cdp, NY has an average annual temperature of 11.5°C (53°F) and receives about 1039 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.5°C
Avg Temp
1039
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 0° / 31° | 88 mm |
| February | 0° / 33° | 77 mm |
| March | 5° / 40° | 102 mm |
| April | 10° / 49° | 95 mm |
| May | 15° / 59° | 87 mm |
| June | 20° / 68° | 72 mm |
| July | 23° / 74° | 75 mm |
| August | 23° / 73° | 98 mm |
| September | 19° / 66° | 79 mm |
| October | 13° / 55° | 79 mm |
| November | 8° / 46° | 95 mm |
| December | 2° / 36° | 92 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Islip Cdp, NY
The most comfortable months to visit Islip Cdp, NY are typically June, September and July, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 28°C high). The coldest is January (near -4°C low). March is usually the wettest month.
Where to stay near Islip
Visiting or relocating to Islip, NY? Compare hotels and short-term rentals across the metro — live availability and prices.
Top-rated places to stay near Islip
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a move to Islip?
Get relocation and cost-of-living insights for Islip, NY by email. No spam, unsubscribe anytime.
More from New York
Population 8,516,202
Population 276,397
Population 209,720
Population 209,529
Population 146,211
Full rankings of New York cities by population
Statewide data for New York
Population, race, income, age, and trends across New York
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.