Central Islip, NY demographics:
population, income, and more

Total population
38,373
1.6% year-over-year change
Median household income
$113,707/yr
3.2% year-over-year change
Housing units
10,660
0.0% year-over-year change

Central Islip population

How many people live in Central Islip

Central Islip is home to 38,373 residents, according to the most recent Census data. Gender-wise, 50.6% of Central Islip locals are male, and 49.4% are female.

Total population
38,373
1.6% year-over-year change
Gender ratio
Male
50.6%
19,415
Female
49.4%
18,958
Value Percent YoY change
Male 19,415 50.6% 2.3%
Female 18,958 49.4% 1.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Central Islip is 35, with the population distributed as follows: about 21.2% are children under 15, then 15.4% are in the 15 to 24 age group. Adults between 25 and 44 make up 28% of the population, while another 24% fall into the 45 to 64 bracket. Finally, around 11.5% are 65 or older.

Median age
34.6
Age breakdown
Under 15
21.2%
15 to 24
15.4%
25 to 44
28%
45 to 64
24%
Over 65
11.5%
Value Percent YoY change
Under 15 8,120 21.2% 6.3%
15 to 24 5,903 15.4% -1.3%
25 to 44 10,752 28% -4.0%
45 to 64 9,189 24% 2.2%
Over 65 4,409 11.5% 11.8%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Central Islip, 58.7% of the population are US-born citizens, while 22% have gained naturalized citizenship. At the same time, 19.3% of residents are non-citizens. As for race, 22.1% of locals are Caucasian, 18.3% are African American and 1.8% have Asian roots. There’s also a share of 24% that includes residents with two or more races.

Citizenship
U.S.-born citizens
58.7%
Non-U.S.-born citizens
22%
Non-citizens
19.3%
Value Percent YoY change
U.S.-born citizens 22,523 58.7% 1.9%
Non-U.S.-born citizens 8,457 22% 0.2%
Non-citizens 7,393 19.3% 2.5%
Racial breakdown
White
22.1%
Black or African American
18.3%
American Indian and Alaska Native
1.1%
Asian
1.8%
Native Hawaiian and other Pacific Islander
0%
Two or more races
24%
Other
32.7%
Value Percent
White 8,490 22.1%
Black or African American 7,016 18.3%
American Indian and Alaska Native 424 1.1%
Asian 683 1.8%
Native Hawaiian and other Pacific Islander 16 0%
Two or more races 9,192 24%
Other 12,552 32.7%

Households in Central Islip

A peek inside Central Islip households

Central Islip has 9,545 households, with an average of 4 members in each. Of these, 72.5% are families, while the remaining 27.5% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
9,545
-1.7% year-over-year change
Average people per household
4
Non-family households
2,629
Family households
6,916
Value Percent YoY change
Non-family households 2,629 27.5% -3.6%
Family households 6,916 72.5% -1.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Central Islip

The housing landscape of Central Islip

Central Islip's housing consists of 10,660 units, with 64.5% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 15.9% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 0.2% of the housing landscape.

Housing units
10,660
0.0% year-over-year change
Housing types
Value Percent
1 unit, detached 6,872 64.5%
1 unit, attached 1,697 15.9%
2 units 388 3.6%
3 or 4 units 221 2.1%
5 to 9 units 447 4.2%
10 to 19 units 363 3.4%
20 to 49 units 295 2.8%
50 or more units 352 3.3%
Mobile home 25 0.2%
Homes built since 2020
162
113.2% year-over-year change

The age of buildings in Central Islip

In Central Islip, the median construction year is 1969. About 3.1% of homes were built before the 1940s, with another 6.2% going up by 1949. Most development happened in the second half of the 20th century. Then, 6.9% of homes were added from 2000 to 2009, 3.4% between 2010 and 2019, and 1.5% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 332 3.1% 72.9%
Built between 1940 and 1949 663 6.2% 2.0%
Built between 1950 and 1959 2,258 21.2% 0.2%
Built between 1960 and 1969 2,336 21.9% -0.8%
Built between 1970 and 1979 1,723 16.2% -20.1%
Built between 1980 and 1989 693 6.5% -3.1%
Built between 1990 and 1999 1,402 13.2% 17.0%
Built between 2000 and 2009 734 6.9% -0.7%
Built between 2010 and 2019 357 3.4% 9.5%
Built in 2020 or later 162 1.5% 113.2%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Central Islip occupancy rates

Out of the 9,545 occupied housing units in Central Islip, 78.2% are owner-occupied, while 21.8% are lived in by tenants. Meanwhile, 10.5% of all homes on the local market sit vacant.

Occupied housing units
9,545
-1.7% year-over-year change
Occupancy breakdown
Renter occupied
2,085
Owner occupied
7,460
Value Percent YoY
change
Renter occupied 2,085 21.8% -6.2%
Owner occupied 7,460 78.2% -0.4%
Unoccupied housing units
10.5%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Central Islip housing costs

Housing costs in Central Islip come to a median of $2,471 per month, while tenants specifically pay a median gross rent of $2,071.

Median housing costs per month
$2,471/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Central Islip
$2,071/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Central Islip

Central Islip education at a glance

About 42% of the population in Central Islip went to high school, while 19% pursued college studies. Another 8.6% earned an associate degree and 11% hold a bachelor’s. Meanwhile, 6.5% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 3,678 13% 2.5%
High school diploma 11,910 42% -1.9%
College diploma 5,378 19% -1.4%
Associate degree 2,442 8.6% 7.8%
Bachelor's degree 3,134 11% 10.5%
Graduate degree 1,841 6.5% 2.4%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Central Islip

How much people earn in Central Islip

The average annual household income in Central Islip was $130,740 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +5.1% change from the previous year. At the same time, the median income stood at $113,707, reflecting a +3.2% shift over the same period.

Average household income in Central Islip
$130,740/year
5.1% year-over-year change
Median household income in Central Islip
$113,707/year
3.2% year-over-year change

Central Islip income by age

In Central Islip, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $116,875. Those with someone between 45 and 64 in charge, often well established professionally, earn $129,896 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $174,365, while those led by someone over 65, many of whom may be retired, have about $62,426 in earnings. Overall, 90.8% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $174,365 2.8%
25 - 44 $116,875 2.2%
45 - 64 $129,896 5.8%
Over 65 $62,426 1.9%
Above poverty level
33,724
Below poverty level
3,435
Value Percent YoY
change
Above poverty level 33,724 90.8% 1.5%
Below poverty level 3,435 9.2% 0.9%

Average renter income in Central Islip

To get a better sense of what renters earn on average in Central Islip, their median household income was $49,855 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 49.8%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$49,855
Rent-to-income ratio
49.8%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Central Islip

Workforce and job types in Central Islip

The job market in Central Islip is powered by 18,208 working residents, spread across a range of industries and roles. 69% of the working population are employed in professional or administrative positions, while 31% are in hands-on or service-based jobs. Also, 6.7% run their own businesses, 72.2% are employed by private companies, and 14.1% work in the public sector.

Workforce demographics

Working population
18,208
-0.7% year-over-year change
White collar
12,560
Blue collar
5,648
Value Percent YoY change
White collar 12,560 69% 0.8%
Blue collar 5,648 31% -4.0%
Employer type
Self employees
6.7%
Private companies
72.2%
Governmental workers
14.1%
Not for profit companies
7.1%
Value Percent YoY change
Self employees 1,213 6.7% -0.3%
Private companies 13,137 72.2% 1.2%
Governmental workers 2,572 14.1% -2.5%
Not for profit companies 1,286 7.1% -14.3%
Unemployment rate
6.1%
8.3% year-over-year change

Available workforce

The unemployment rate in Central Islip stands at 6.1%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Central Islip

How people get around in Central Islip

In Central Islip, the average commute time is 27 minutes. Commuting methods vary: 85.1% of residents travel by personal vehicle and 0.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
27 min
-2.1% year-over-year change
Means of transportation
Value Percent YoY change
Car 14,905 85.1% -4.1%
Taxicab 141 0.8% 281.1%
Bus or trolleybus 100 0.6% 127.3%
Subway or elevated 255 1.5% N/A
Railroad 376 2.2% 17.1%
Bicycle 202 1.2% 27.9%
Walk 72 0.4% 12.5%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Central Islip by zipcode?

Zipcode Population Number of households Median income Average income
11722 39,033 9,660 $114,049 $131,689
11752 9,204 3,046 $151,917 $165,203

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FAQs about Central Islip demographics 

What is the total population of Central Islip?

Central Islip has a total population of 38,373 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +1.6% compared to a year ago.

What is the gender ratio in Central Islip?

The gender ratio in Central Islip is as follows:
  • 50.6% males (19,415 residents)
  • 49.4% females (18,958 residents)

What is the median age in Central Islip?

The median age in Central Islip is 34.6.

What is the age distribution of the population in Central Islip?

The age distribution in Central Islip is as follows:
  • Under 15: 21.2% (8,120 residents)
  • Ages 15-24: 15.4% (5,903 residents)
  • Ages 25-44: 28% (10,752 residents)
  • Ages 45-64: 24% (9,189 residents)
  • Over 65: 11.5% (4,409 residents)

What is the racial and ethnic makeup of Central Islip?

The racial and ethnic makeup of Central Islip is as follows:
  • White: 22.1% (8,490 residents)
  • Black or African American: 18.3% (7,016 residents)
  • American Indian and Alaska Native: 1.1% (424 residents)
  • Asian: 1.8% (683 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (16 residents)
  • Two or More Races: 24% (9,192 residents)
  • Other: 32.7% (12,552 residents)

What percentage of the population in Central Islip are U.S.-born citizens?

U.S.-born citizens represent 58.7% of the population in Central Islip.

How many housing units are there in Central Islip?

There are 10,660 housing units in Central Islip, reflecting a 0.0% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Central Islip and what is the average household size?

Central Islip has a total of 9,545 households, with an average of 4 people in each.

What is the median household income in Central Islip?

Central Islip has a median household income of $113,707, representing a +3.2% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Central Islip?

The employment rate is 93.9% in Central Islip, with a workforce of 18,208 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 69% (12,560 residents)
  • Blue-collar workers: 31% (5,648 residents)

Places of employment:
  • Self-employed: 6.7% (1,213 residents)
  • Private companies: 72.2% (13,137 residents)
  • Governmental workers: 14.1% (2,572 residents)
  • Not-for-profit companies: 7.1% (1,286 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025