Seaford, New York Population 2021

15,040
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Seaford is a city located in Nassau County New York. Seaford has a 2020 population of 15,040. Seaford is currently declining at a rate of 0.00% annually and its population has decreased by -1.66% since the most recent census, which recorded a population of 15,294 in 2010. Seaford reached it's highest population of 15,891 in 2016.

The average household income in Seaford is $159,540 with a poverty rate of 2.09%. The median rental costs in recent years comes to $2,175 per month, and the median house value is $481,900. The median age in Seaford is 42.8 years, 41.1 years for males, and 44.7 years for females.

Seaford Demographics

According to the most recent ACS, the racial composition of Seaford was:

  • White: 96.32%
  • Asian: 2.14%
  • Two or more races: 0.94%
  • Other race: 0.37%
  • Native American: 0.20%
  • Black or African American: 0.02%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Seaford, New York is 15,040 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 15,113.The last official US Census in 2010 recorded the population at 15,294.

Seaford, New York Population 2021

Population by Race

Race Population Percentage
White14,48796.32%
Asian3222.14%
Two or More Races1420.94%
Some Other Race560.37%
American Indian and Alaska Native300.20%
Black or African American30.02%
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Seaford Population by Race

Seaford Population Pyramid $2021

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Seaford Median Age

42.8


Total

41.1


Male

44.7


Female

Seaford Adults

There are 11,781 adults, (2,814 of whom are seniors) in Seaford.

Seaford Age Dependency

67.7

Age Dependency Ratio

31.4

Old Age Dependency Ratio

36.3

Child Dependency Ratio

Seaford Sex Ratio

Female

7,557

50.25%

Male

7,483

49.75%

Seaford Population by Age

Seaford Renter vs Owner Occupied by Household Type

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Seaford Household Types

Type Owner Renter
Male100%0%
Married95.6%4.4%
Female92.7%7.3%
All91.6%8.4%
Non Family76.3%23.7%

91.6%

Rate of Home Ownership

Seaford Households and Families

Type Count Average Size Owned
All5,1102.9391.6
Married3,5113.495.6
Non Family1,0381.3176.3
Female3962.9692.7
Male1653.09100

3.27

Average Family Size

2.93

Average Household Size

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Seaford Households by Type

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Education Attained Count Percentage
Less Than 9th Grade2222.11%
9th to 12th Grade1211.15%
High School Graduate2,45323.29%
Some College1,92918.31%
Associates Degree1,0379.84%
Bachelors Degree2,68625.50%
Graduate Degree2,08619.80%
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Seaford Educational Attainment by Sex (over 25)

Seaford Educational Attainment by Race

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Race Total High School Bachelors
White9,6049,3024,290
Hispanic608571280
Asian282278179
Other Race565645
2+ Races373723
Black33

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among other race people with a rate of 80.36%.

Seaford Educational Attainment by Race

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Name Average Male Female
Overall$74,459$86,324$60,605
Less Than 9th Grade$$41,726$
High School Graduate$56,375$70,406$45,774
Some College$64,360$80,351$42,464
Bachelors Degree$81,422$105,428$61,755
Graduate Degree$86,004$105,984$80,114

$74,459

Average Earnings

$86,324

Average Male

$60,605

Average Female

Seaford Earnings by Educational Attainment

Seaford Language by Age

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Seaford Language

90.92% of Seaford residents speak only English, while 9.08% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 4.88% of the population.

Seaford Language

Seaford Poverty by Race

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Name Total In Poverty Poverty Rate
White13,6672481.81%
Hispanic909626.82%
Asian32241.24%

2.09%

Overall Poverty Rate

1.53%

Male Poverty Rate

2.65%

Female Poverty Rate

Poverty in Seaford

The race most likely to be in poverty in Seaford is Hispanic, with 6.82% below the poverty level.

The race least likely to be in poverty in Seaford is Asian, with 1.24% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.00%. Among those working part-time, it was 1.14%, and for those that did not work, the poverty rate was 7.40%.

Seaford Poverty

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Name Poverty
Less Than 9th Grade7.29%
High School5.79%
Some College1.92%
Bachelors or Greater0.96%

Seaford Poverty Rate by Education

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Rate Poverty
Female Unemployed10.65%
Male Unemployed3.78%
Female Employed0.49%
Male Employed0.00%

Seaford Poverty Rate by Employment Status and Sex

Seaford Income by Household Type

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Name Median Mean
Households$133,278$159,540
Families$148,526$171,603
Married Families$157,331-
Non Families$86,042$104,489
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Income by Household Type

Seaford Marital Status

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Marriage Rates

58.6%

Overall Marriage Rate

59.7%

Male Marriage Rate

57.5%

Female Marriage Rate

Seaford Married by Age and Sex

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Seaford Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 55-64.

Seaford Marital Status by Race

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Seaford Marital Status

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662

Number of Veterans

645

Male Veterans

17

Female Veterans

War Veterans
Vietnam316
Korea78
First Gulf War74
Second Gulf War18
World War II9

Seaford Veterans by War

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Age Group Veterans
65 to 74271
75+200
55 to 6499
35 to 5492
18 to 34

Seaford Veterans by Age

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Name Veterans % of Total
White6275.50%
Hispanic355.45%
Other Race3562.50%

Seaford Veterans by Race

Seaford Veterans by Education

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2.72%

Veteran Poverty Rate

21.60%

Veteran Disability Rate

Seaford Veterans by Education

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68.1%

Labor Force Participation

65.2%

Employment Rate

4.3%

Unemployment Rate

Seaford Employment by Age

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Seaford Employment by Race

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Seaford Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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86.32%

Born in Seaford

92.21%

Native Born

7.79%

Foreign Born

0.98%

Non Citizen

6.82%

Naturalized

Place of Birth

92.21% of Seaford residents were born in the United States, with 86.32% having been born in New York. 0.98% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Seaford Place of Birth

Year Population Growth Annual Growth Rate
202115,0400.00%
202015,0400.00%
201915,040-73-0.48%
201815,113-292-1.90%
201715,405-486-3.06%
201615,8912351.50%
201515,6562511.63%
201415,405-122-0.79%
201315,5272761.81%
201215,2511861.23%
201115,065-229-1.50%
201015,2940.00%

Seaford Population by Year