Islip Flag

Islip

County:
Suffolk County
County Seat:
No
Area (mi²):
4.749
State:
New York

Islip is a CDP located in Suffolk County, New York. Islip has a 2025 population of 16,933. Islip is currently declining at a rate of -0.69% annually and its population has decreased by -0.19% since the most recent census, which recorded a population of 16,965 in 2020.

The average household income in Islip is $136,341 with a poverty rate of 5.77%.The median age in Islip is 44 years: 43.2 years for males, and 45.3 years for females.

16.9K
Total Population
3,566
Density (mi²)
-117 -0.69%
Growth

Islip Population

Islip Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Islip includes 73.72% White, 5.81% other race, 5.28% Asian, 3.62% Black or African American, and smaller percentages for and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White12,69773.72%
Two or more races1,99511.58%
Other race1,0005.81%
Asian9095.28%
Black or African American6233.62%

Islip Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Islip's average per capita income is $64,394. Household income levels show a median of $122,596. The poverty rate stands at 5.77%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$154,274-
Families$152,668$158,979
Households$122,596$136,341
Non Families$58,419$68,406

$64,394

Average Income

$122,596

Median Household Income

5.77%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)