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 2026 population of 5,005. Sea Cliff is currently declining at a rate of -0.18% annually and its population has decreased by -1.11% since the most recent census, which recorded a population of 5,061 in 2020.

The median household income in Sea Cliff is $193,590 with a poverty rate of 0.94%. The median age in Sea Cliff is 40.5 years: 47.1 years for males, and 37.8 years for females. For every 100 females there are 79.9 males.

5K
Total Population
4,489
Density (mi²)
-9 -0.18%
Growth

Sea Cliff Population

Sea Cliff Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20265,005-9-0.18%
20255,014-10-0.2%
20245,024140.28%
20235,010-6-0.12%
20225,016-34-0.67%
20215,050-10-0.2%
20205,061420.84%
20195,019-10-0.2%
20185,029-11-0.22%
20175,040-2-0.04%
20165,04210.02%
20155,041-4-0.08%
20145,04520.04%
20135,04340.08%
20125,03950.1%
20115,034140.28%
20105,020250.5%
20005,066120.24%
19905,054-310-5.78%
19805,364-526-8.93%
19705,8902213.9%
19605,66980116.45%
19504,86845210.24%
19404,41696027.78%
19303,45600%

Median Age

Overall: 40.5 years
Female: 37.8 years
Male: 47.1 years

Sea Cliff Adults

There are 3,696 adults, (952 of whom are seniors) in Sea Cliff.

Sex Ratio

Female: 2,798 (55.6%)
Male: 2,235 (44.4%)

Demographics

The racial composition of Sea Cliff includes 85.16% White, and smaller percentages for other race, Black or African American, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White4,28685.16%
Two or more races54110.75%
Other race1212.4%
Black or African American551.09%
Asian300.6%
Race
Population ↓
Percentage (of total)
Two or more races3356.66%
White1162.3%
Other race1092.17%
Race
Population ↓
Percentage (of total)
White4,17082.85%
Two or more races2064.09%
Black or African American551.09%
Asian300.6%
Other race120.24%

Sea Cliff Marital Status

Economics and Income Statistics

Sea Cliff 's average per capita income is $98,750. Household income levels show a median of $193,590. The poverty rate stands at 0.94%.

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$233,108-
Families$211,000$327,297
Households$193,590$279,873
Non Families$84,896$123,457

$98,750

Average Income

$193,590

Median Household Income

0.94%

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)