Stony Brook

County:: Suffolk County
County Seat:: No
Area (mi²):: 5.823
State:: New York

Stony Brook is a CDP located in Suffolk County, New York. Stony Brook has a 2025 population of 12,191. Stony Brook is currently declining at a rate of -0.84% annually but its population has increased by 3.45% since the most recent census, which recorded a population of 11,785 in 2020.

The average household income in Stony Brook is $202,116 with a poverty rate of 4.35%. The median age in Stony Brook is 45.4 years: 43 years for males, and 47 years for females.

Demographics

The racial composition of Stony Brook includes 80.09% White, 11.25% Asian, 3.2% Black or African American, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Asian

Two or more races

Black or African American

Other race

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	10,273	80.09%
Asian	1,443	11.25%
Two or more races	556	4.33%
Black or African American	410	3.2%
Other race	145	1.13%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Stony Brook Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Stony Brook's average per capita income is $94,541. Household income levels show a median of $162,054. The poverty rate stands at 4.35%.

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	$205,341	-
Families	$192,925	$234,697
Households	$162,054	$202,116
Non Families	$88,611	$98,606

$94,541

Average Income

$162,054

Median Household Income

4.35%

Poverty Rate