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 and multiracial populations.

Population by Race

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%

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