Sea Cliff Flag

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.

5K
Total Population
4,441
Density (mi²)
-22 -0.44%
Growth

Sea Cliff Population

Sea Cliff Population

Data after 2023 is projected based on recent change

Demographics

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

Population by Race

White (89.5%)

Two or more races (7.1%)

Other race (1.4%)

Asian (1.4%)

Black or African American (0.6%)

Race
Population
Percentage (of total)
White4,51089.54%
Two or more races3597.13%
Other race711.41%
Asian681.35%
Black or African American290.58%

Sea Cliff Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)