Holtsville

County:: Suffolk County
County Seat:: No
Area (mi²):: 7.109
State:: New York

Holtsville is a CDP located in Suffolk County, New York. Holtsville has a 2025 population of 19,568. Holtsville is currently declining at a rate of -0.05% annually but its population has increased by 5.35% since the most recent census, which recorded a population of 18,574 in 2020.

The average household income in Holtsville is $148,631 with a poverty rate of 3.4%. The median age in Holtsville is 39.7 years: 40 years for males, and 39.4 years for females.

Demographics

The racial composition of Holtsville includes 79.71% White, 5.34% Black or African American, 4.3% other race, 3.57% Asian, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Other race

Asian

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	15,344	79.71%
Two or more races	1,200	6.23%
Black or African American	1,027	5.34%
Other race	827	4.3%
Asian	687	3.57%
Native American	165	0.86%
Native Hawaiian or Pacific Islander	0	0%

Holtsville Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Holtsville's average per capita income is $64,507. Household income levels show a median of $130,851. The poverty rate stands at 3.4%.

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	$160,435	-
Families	$147,345	$162,826
Households	$130,851	$148,631
Non Families	$57,212	$78,776

$64,507

Average Income

$130,851

Median Household Income

3.4%

Poverty Rate