Sea Cliff

County:: Nassau County
County Seat:: No
Area (mi²):: 1.115
State:: New York

Sea Cliff is a village located in Nassau County, New York. Sea Cliff has a 2025 population of 4,951. Sea Cliff is currently declining at a rate of -0.44% annually and its population has decreased by -2.15% since the most recent census, which recorded a population of 5,060 in 2020.

The average household income in Sea Cliff is $276,255 with a poverty rate of 1.56%. The median age in Sea Cliff is 41.3 years: 47.2 years for males, and 37.9 years for females.

Demographics

The racial composition of Sea Cliff includes 89.54% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	4,510	89.54%
Two or more races	359	7.13%
Other race	71	1.41%
Asian	68	1.35%
Black or African American	29	0.58%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Sea Cliff Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Sea Cliff's average per capita income is $90,875. Household income levels show a median of $185,650. The poverty rate stands at 1.56%.

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	$250,001	-
Families	$233,125	$336,360
Households	$185,650	$276,255
Non Families	$75,298	$103,638

$90,875

Average Income

$185,650

Median Household Income

1.56%

Poverty Rate