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 and multiracial populations.

Population by Race

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%

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