Nassau County, New York Population 2021

Nassau County, New York's estimated population is 1,355,700 with a growth rate of -0.04% in the past year according to the most recent United States census data. Nassau County, New York is the 7th largest county in New York. The 2010 Population was 1,341,670 and has seen a growth of 1.05% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
20211,355,700-610-0.04%
20201,356,310-610-0.04%
20191,356,920-610-0.04%
20181,357,5302400.02%
20171,357,2901,3400.10%
20161,355,9501,1100.08%
20151,354,8401400.01%
20141,354,7002,5100.19%
20131,352,1902,5700.19%
20121,349,6203,4000.25%
20111,346,2204,5500.34%
20101,341,67054,3204.22%
19901,287,350-34,230-2.59%
19801,321,580-106,500-7.46%
19701,428,080127,9109.84%
19601,300,170627,40593.26%
1950672,765266,01765.40%
1940406,748103,69534.22%
1930303,053176,933140.29%
1920126,12042,19050.27%
191083,93028,48251.37%
190055,4480.00%
2021 Growth Rate
-0.04%
County Website
Founded
1899
County Seat
2010 Population
1,341,670
Growth Since 2010
1.05%
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Nassau County, New York Population Growth

Population by Race

Race Population Percentage
White922,87368.03%
Black or African American158,85711.71%
Asian130,9719.66%
Some Other Race98,3887.25%
Two or More Races41,1063.03%
American Indian and Alaska Native3,9120.29%
Native Hawaiian and Other Pacific Islander4020.03%
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Nassau County, New York Population by Race

Nassau County, New York Population Pyramid $2021

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Nassau County, New York Median Age

41.7


Total

40


Male

43.4


Female

Nassau County, New York Adults

There are 1,062,770 adults, (236,983 of whom are seniors) in Nassau County, New York.

Nassau County, New York Age Dependency

64.3

Age Dependency Ratio

28.7

Old Age Dependency Ratio

35.6

Child Dependency Ratio

Nassau County, New York Sex Ratio

Female

696,416

51.34%

Male

660,093

48.66%

Nassau County, New York Population by Age

Nassau County, New York Renter vs Owner Occupied by Household Type

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Nassau County, New York Household Types

Type Owner Renter
Married89%11%
All80.7%19.3%
Female70%30%
Male69%31%
Non Family66.1%33.9%

80.7%

Rate of Home Ownership

Nassau County, New York Households and Families

Type Count Average Size Owned
All446,9772.9980.7
Married272,9613.5489
Non Family104,3261.2166.1
Female49,9743.4770
Male19,7163.569

3.45

Average Family Size

2.99

Average Household Size

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Nassau County, New York Households by Type

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Education Attained Count Percentage
Less Than 9th Grade44,1504.68%
9th to 12th Grade36,9963.92%
High School Graduate213,90922.68%
Some College139,87114.83%
Associates Degree74,6747.92%
Bachelors Degree238,16825.26%
Graduate Degree195,24520.70%
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Nassau County, New York Educational Attainment by Sex (over 25)

Nassau County, New York Educational Attainment by Race

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Race Total High School Bachelors
White594,018569,126302,218
Hispanic139,624101,22632,768
Black107,36597,65335,307
Asian90,40183,64058,144
Other Race60,26141,64710,946
2+ Races19,75715,1346,370
Native American2,2561,658609
Islander24218057

The highest rate of high school graduation is among white people with a rate of 95.81%.

The highest rate of bachelors degrees is among asian people with a rate of 64.32%.

Nassau County, New York Educational Attainment by Race

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Name Average Male Female
Overall$59,724$71,826$49,218
Less Than 9th Grade$26,655$32,060$18,509
High School Graduate$39,857$49,542$29,703
Some College$50,301$62,513$40,555
Bachelors Degree$74,575$91,522$59,781
Graduate Degree$93,119$112,890$81,452

$59,724

Average Earnings

$71,826

Average Male

$49,218

Average Female

Nassau County, New York Earnings by Educational Attainment

Nassau County, New York Language by Age

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Nassau County, New York Language

71.27% of Nassau County, New York residents speak only English, while 28.73% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 12.96% of the population.

Nassau County, New York Language

Nassau County, New York Poverty by Race

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Name Total In Poverty Poverty Rate
White803,20429,1213.63%
Hispanic225,76224,32610.78%
Black154,62113,3768.65%
Other96,76613,17713.62%
Asian130,0075,4124.16%
Multiple40,2163,4488.57%
Native3,86976219.70%
Islander399112.76%

5.56%

Overall Poverty Rate

4.85%

Male Poverty Rate

6.23%

Female Poverty Rate

Poverty in Nassau County, New York

The race most likely to be in poverty in Nassau County, New York is Native, with 19.70% below the poverty level.

The race least likely to be in poverty in Nassau County, New York is Islander, with 2.76% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.12%. Among those working part-time, it was 6.45%, and for those that did not work, the poverty rate was 10.50%.

Nassau County, New York Poverty

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Name Poverty
Less Than 9th Grade15.13%
High School6.69%
Some College4.26%
Bachelors or Greater2.55%

Nassau County, New York Poverty Rate by Education

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Rate Poverty
Male Unemployed12.54%
Female Unemployed12.28%
Female Employed2.97%
Male Employed2.11%

Nassau County, New York Poverty Rate by Employment Status and Sex

Nassau County, New York Income by Household Type

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Name Median Mean
Households$116,100$152,785
Families$135,643$172,901
Married Families$151,264$190,361
Non Families$52,177$78,121
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Income by Household Type

Nassau County, New York Marital Status

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Marriage Rates

53.9%

Overall Marriage Rate

56.8%

Male Marriage Rate

51.1%

Female Marriage Rate

Nassau County, New York Married by Age and Sex

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Nassau County, New York Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

Nassau County, New York Marital Status by Race

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Nassau County, New York Marital Status

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43,255

Number of Veterans

41,083

Male Veterans

2,172

Female Veterans

War Veterans
Vietnam15,079
Korea6,498
Second Gulf War4,281
World War II4,183
First Gulf War3,640

Nassau County, New York Veterans by War

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Age Group Veterans
75+18,428
65 to 7412,697
35 to 545,481
55 to 644,414
18 to 342,235

Nassau County, New York Veterans by Age

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Name Veterans % of Total
White36,9094.99%
Black3,8993.14%
Hispanic2,7991.72%
Other Race8961.27%
Asian8320.83%
2+ Races5972.43%
Native American1033.72%
Islander196.13%

Nassau County, New York Veterans by Race

Nassau County, New York Veterans by Education

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3.69%

Veteran Poverty Rate

29.08%

Veteran Disability Rate

Nassau County, New York Veterans by Education

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65.1%

Labor Force Participation

62.6%

Employment Rate

3.9%

Unemployment Rate

Nassau County, New York Employment by Age

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Nassau County, New York Employment by Race

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Nassau County, New York 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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70.31%

Born in Nassau County, New York

77.62%

Native Born

22.38%

Foreign Born

7.69%

Non Citizen

14.69%

Naturalized

Place of Birth

77.62% of Nassau County, New York residents were born in the United States, with 70.31% having been born in New York. 7.69% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Nassau County, New York Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources