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.

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 Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	12,697	73.72%
Two or more races	1,995	11.58%
Other race	1,000	5.81%
Asian	909	5.28%
Black or African American	623	3.62%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Islip Marital Status

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