West Islip, New York Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of West Islip, New York is 26,559 as of the 2023 American Community Survey, making it the 58th-largest city in New York. The median household income is $171,045, the median home value is $592,700, and the median age is 39.8.
26,559
Population
4358
People / sq mi
$171,045
Median Income
$592,700
Median Home Value
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West Islip covers 6.1 sq mi of land at 4358 people per square mile.
About West Islip, NY
Homeownership is the standout figure in West Islip: 95.8% of homes are owner-occupied, higher than the national rate. With 26,559 residents, West Islip is a city in New York.
Earnings sit at the high end: a median household income of $171,045, above the US median of $78,538. Very few residents live in poverty — 1.1%, below the national 12.4%. The median home value is $592,700, with typical rent around $2,613.
About 50.1% of adults 25 and older have a bachelor’s degree, above the 35.0% national figure. Remote work is below the national 14.0% at 12.3%, and the average commute runs about 31 minutes each way.
The ownership rate anchors the housing story in West Islip, and tends to move with the age structure and home-value figures above.
Race & Ethnicity
| White | 84.3% |
| Black or African American | 1.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Economy & Income
$171,045
Median Household Income
$66,182
Per Capita Income
1.1%
Poverty Rate
2.6%
Unemployment Rate
Housing
$592,700
Median Home Value
$2,613
Median Rent
95.8%
Owner-Occupied
Education
96.3%
High School+
50.1%
Bachelor's+
Commute
5.5%
Drive Alone
75.0%
Public Transit
12.3%
Work From Home
30.9 min
Avg Commute
Community Profile
5.0%
Foreign Born
89.0%
Non-English at Home
3.1%
Veterans
6.4%
With Disability
97.2%
Health Insurance
98.3%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 31.3% |
| Information | 11.7% |
| Finance, Insurance & Real Estate | 9.9% |
| Retail Trade | 8.6% |
| Education, Health Care & Social Services | 6.7% |
| Public Administration | 5.7% |
| Construction | 5.6% |
| Manufacturing | 4.5% |
| Arts, Entertainment & Food Services | 3.1% |
| Transportation & Warehousing | 1.1% |
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Frequently Asked Questions
West Islip, New York has a population of 26,559 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 58th-largest city in New York.
The median household income in West Islip, New York is $171,045, with 1.1% of residents living below the federal poverty level.
The median home value in West Islip, New York is $592,700, with median monthly rent at $2,613 and a homeownership rate of 95.8%.
The median age in West Islip, New York is 39.8 years. The population is 52.5% male and 47.5% female.
West Islip Cdp, NY Climate
West Islip Cdp, NY has an average annual temperature of 11.6°C (53°F) and receives about 1048 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.6°C
Avg Temp
1048
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 0° / 31° | 87 mm |
| February | 0° / 33° | 77 mm |
| March | 5° / 41° | 103 mm |
| April | 10° / 50° | 94 mm |
| May | 15° / 60° | 89 mm |
| June | 20° / 69° | 72 mm |
| July | 24° / 74° | 78 mm |
| August | 23° / 73° | 101 mm |
| September | 19° / 66° | 80 mm |
| October | 13° / 55° | 80 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 West Islip Cdp, NY
The most comfortable months to visit West 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 West Islip
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.