Central Islip, New York Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Central 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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B
Health Around average
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B
Income Around average
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F
Education Well below average
Source: Map AI Methodology
Population
| Metric | Central Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Population | 39,073 | 19,748,855 | 337,468,954 |
| Population density (per sq mi) | 5461.2 | 362.0 | 86.4 |
| Population growth (%/yr) | 1.29% | 0.05% | 0.59% |
| Median age | 33.9 | 38.7 | 37.3 |
| Households | 9,541 | 7,694,043 | 130,235,071 |
Population in Central Islip grew by 14.4% from 2009 to 2024, reaching 39,073 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Central Islip is Gen Z, aged 13–28, at 24.3% of residents. That is 3.8 points above New York as a whole.
- Gen Z 13–28 9,509 24.3% +3.8 pts
- Millennials 29–44 9,472 24.2% +2.0 pts
- Gen X 45–60 7,867 20.1% -0.7 pts
- Boomers 61–79 4,580 11.7% -5.6 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 49.2% of the people living in Central Islip and men 50.8%.
- Women 49.2% New York 51.3%
- Men 50.8% New York 48.7%
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Economy
Central Islip has a the economy index of B, which means it is quite prosperous.
| Metric | Central Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Median household income | $114,259 | $86,556 | $80,455 |
| Income growth (%/yr) | 6.97% | 4.51% | 4.80% |
| Unemployment rate | 6.0% | 6.4% | 5.2% |
The median household income in Central Islip is about 32% higher than in New York.
Housing
| Metric | Central Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Median home price | $456,189 | $471,885 | $248,835 |
| Median rent | $2,080 | $1,621 | $1,407 |
| Homeownership rate | 77.9% | 54.3% | 65.2% |
The median home price in Central Islip is about 18.3 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $2,080 per month for that long.
Commute Time & Mobility
Commuters in Central 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 194 hours, about 8.1 full days, spent commuting.
| Metric | Central Islip | New York Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.3 | 28.7 | 22.4 |
| Round-trip commute (min) | 46.7 | 57.4 | 44.8 |
| Yearly time spent (hours) | 194 | 239 | 187 |
| Estimated yearly cost | $6,027 | $7,414 | $5,790 |
| Work from home | 6.8% | 15.0% | 15.0% |
| Highway traffic (vehicles/day) | 18,311 | 9,257 | 8,813 |
| Local road traffic (vehicles/day) | 3,730 | 1,586 | 1,355 |
The average commute time in Central 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
Central Islip has a education index of F, which means it scores poorly in education.
| Metric | Central Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 16.8% | 36.5% | 31.6% |
| Average household size | 4.01 | 2.49 | 2.53 |
Health
Central Islip has a health index of B, which means it is quite healthy.
| Metric | Central Islip | New York Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.5 | 80.3 | 78.3 |
| Self-rated poor health | 15.8% | 13.2% | 16.3% |
| Smokers | 16.9% | 17.4% | 19.0% |
Central Islip, NY Compared With Nearby Cities
How Central Islip, NY compares with the 1 cities closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Central Islip, NY | 39,073 | $114,259 #2/2 | $456,189 #2/2 | 23.3 min #1/2 |
| Hauppauge, NY | 20,770 | $141,784 | $974,456 | 23.4 min |
Frequently Asked Questions
Common questions about Central Islip, New York.
How many people live in Central Islip, New York?
About 39,073 people live in Central Islip, New York, in 9,541 households of 4.0 people on average. The median age is 33.9, so residents are younger than the U.S. median of 37.3 by about 3 years.
Is Central Islip, New York urban or rural?
Averaged over its land area, Central Islip, New York has 5,461 people per square mile, a density typical of a city. That is about 63 times the U.S. average of 86.
How affordable is housing in Central Islip, New York?
The median home costs 4.0 times the median household income ($456,189 against $114,259), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $2,080 a month takes about 22% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
How common is a college degree in Central Islip, New York?
16.8% of adults in Central Islip, New York hold a bachelor's degree or higher (about 1 in 6), well below the U.S. share of 31.6%.
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