Barnum Island

County:: Nassau County
County Seat:: No
Area (mi²):: 0.865
State:: New York

Barnum Island is a CDP located in Nassau County, New York. Barnum Island has a 2025 population of 2,338. Barnum Island is currently declining at a rate of -0.21% annually and its population has decreased by -9.94% since the most recent census, which recorded a population of 2,596 in 2020.

The average household income in Barnum Island is $131,100 with a poverty rate of 8.24%. The median age in Barnum Island is 50.1 years: 46.6 years for males, and 50.8 years for females.

Demographics

The racial composition of Barnum Island includes 80.99% White, 4.74% Black or African American, 4.05% other race, 3.08% 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	1,760	80.99%
Two or more races	155	7.13%
Black or African American	103	4.74%
Other race	88	4.05%
Asian	67	3.08%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Barnum Island Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Barnum Island's average per capita income is $71,382. Household income levels show a median of $118,160. The poverty rate stands at 8.24%.

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
Families	$119,500	$151,287
Households	$118,160	$131,100
Married Families	$117,424	-
Non Families	-	$91,765

$71,382

Average Income

$118,160

Median Household Income

8.24%

Poverty Rate