West Islip, New York Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
West Islip, NY Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above average
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A+
Income Top grade
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A
Education Above average
Source: Map AI Methodology
Population
| Metric | West Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Population | 26,389 | 19,748,855 | 337,468,954 |
| Population density (per sq mi) | 3380.5 | 362.0 | 86.4 |
| Population growth (%/yr) | -0.03% | 0.05% | 0.59% |
| Median age | 37.6 | 38.7 | 37.3 |
| Households | 8,352 | 7,694,043 | 130,235,071 |
Population in West Islip declined by 7.7% from 2009 to 2024, reaching 26,389 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in West Islip is Gen X, aged 45–60, at 24.8% of residents. That is 4.0 points above New York as a whole.
- Gen Z 13–28 5,532 21.0% +0.5 pts
- Millennials 29–44 5,198 19.7% -2.5 pts
- Gen X 45–60 6,546 24.8% +4.0 pts
- Boomers 61–79 3,936 14.9% -2.5 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below New York, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 49.9% of the people living in West Islip and men 50.1%.
- Women 49.9% New York 51.3%
- Men 50.1% New York 48.7%
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Economy
West Islip has a the economy index of A+, which means it is exceptionally prosperous.
| Metric | West Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Median household income | $178,823 | $86,556 | $80,455 |
| Income growth (%/yr) | 5.99% | 4.51% | 4.80% |
| Unemployment rate | 3.7% | 6.4% | 5.2% |
The median household income in West Islip is about 107% higher than in New York.
Housing
| Metric | West Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Median home price | $625,000 | $471,885 | $248,835 |
| Median rent | $2,743 | $1,621 | $1,407 |
| Homeownership rate | 95.0% | 54.3% | 65.2% |
The median home price in West Islip is about 19.0 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,743 per month for that long.
Commute Time & Mobility
Commuters in West Islip spend about 47 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 195 hours, about 8.1 full days, spent commuting.
| Metric | West Islip | New York Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.4 | 28.7 | 22.4 |
| Round-trip commute (min) | 46.8 | 57.4 | 44.8 |
| Yearly time spent (hours) | 195 | 239 | 187 |
| Estimated yearly cost | $6,049 | $7,414 | $5,790 |
| Work from home | 12.9% | 15.0% | 15.0% |
| Highway traffic (vehicles/day) | 11,685 | 9,257 | 8,813 |
| Local road traffic (vehicles/day) | 2,986 | 1,586 | 1,355 |
The average commute time in West Islip is 23 minutes, shorter than the 29 minutes in New York.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
West Islip has a education index of A, which means it is very educated.
| Metric | West Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 43.9% | 36.5% | 31.6% |
| Average household size | 3.11 | 2.49 | 2.53 |
Health
West Islip has a health index of A, which means it is very healthy.
| Metric | West Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.0 | 80.3 | 78.3 |
| Self-rated poor health | 9.1% | 13.2% | 16.3% |
| Smokers | 13.3% | 17.4% | 19.0% |
Frequently Asked Questions
Common questions about West Islip, New York.
How many people live in West Islip, New York?
About 26,389 people live in West Islip, New York, in 8,352 households of 3.1 people on average. The median age is 37.6, close to the U.S. median of 37.3.
Is West Islip, New York mostly urban or rural?
Averaged over its land area, West Islip, New York has 3,380 people per square mile, a density typical of a city. That is about 39 times the U.S. average of 86.
How affordable is housing in West Islip, New York?
The median home costs 3.5 times the median household income ($625,000 against $178,823), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $2,743 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in West Islip, New York?
Unemployment in West Islip, New York is only 3.7%, well below the U.S. rate of 5.2%, a sign of a tight labor market where employers compete for workers.
How common is a college degree in West Islip, New York?
43.9% of adults in West Islip, New York hold a bachelor's degree or higher (about 1 in 2), well above the U.S. share of 31.6%.
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