Nassau County, NY demographics:
population, income, and more

Total population
1,389,591
0.1% year-over-year change
Median household income
$146,202/yr
1.9% year-over-year change
Housing units
479,044
0.2% year-over-year change

Nassau County population

How many people live in Nassau County

Nassau County is home to 1,389,591 residents, according to the most recent Census data. Gender-wise, 49.2% of Nassau County locals are male, and 50.8% are female.

Total population
1,389,591
0.1% year-over-year change
Gender ratio
Male
49.2%
683,885
Female
50.8%
705,706
Value Percent YoY change
Male 683,885 49.2% 0.2%
Female 705,706 50.8% 0.0%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Nassau County is 42, with the population distributed as follows: about 17.5% are children under 15, then 12.3% are in the 15 to 24 age group. Adults between 25 and 44 make up 24.2% of the population, while another 27.3% fall into the 45 to 64 bracket. Finally, around 18.7% are 65 or older.

Median age
42
Age breakdown
Under 15
17.5%
15 to 24
12.3%
25 to 44
24.2%
45 to 64
27.3%
Over 65
18.7%
Value Percent YoY change
Under 15 243,194 17.5% -0.7%
15 to 24 170,955 12.3% -0.2%
25 to 44 336,154 24.2% 0.3%
45 to 64 379,788 27.3% -1.0%
Over 65 259,500 18.7% 2.5%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Nassau County, 75% of the population are US-born citizens, while 17.9% have gained naturalized citizenship. At the same time, 7.2% of residents are non-citizens. As for race, 56.8% of locals are Caucasian, 11.2% are African American and 12.2% have Asian roots. There’s also a share of 10.2% that includes residents with two or more races.

Citizenship
U.S.-born citizens
75%
Non-U.S.-born citizens
17.9%
Non-citizens
7.2%
Value Percent YoY change
U.S.-born citizens 1,041,604 75% -0.5%
Non-U.S.-born citizens 248,634 17.9% 1.2%
Non-citizens 99,353 7.2% 4.3%
Racial breakdown
White
56.8%
Black or African American
11.2%
American Indian and Alaska Native
0.2%
Asian
12.2%
Native Hawaiian and other Pacific Islander
0%
Two or more races
10.2%
Other
9.2%
Value Percent
White 789,352 56.8%
Black or African American 156,203 11.2%
American Indian and Alaska Native 3,134 0.2%
Asian 169,900 12.2%
Native Hawaiian and other Pacific Islander 298 0%
Two or more races 142,379 10.2%
Other 128,325 9.2%

Households in Nassau County

A peek inside Nassau County households

Nassau County has 458,166 households, with an average of 3 members in each. Of these, 77% are families, while the remaining 23% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
458,166
0.5% year-over-year change
Average people per household
3
Non-family households
105,210
Family households
352,956
Value Percent YoY change
Non-family households 105,210 23% 0.9%
Family households 352,956 77% 0.3%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Nassau County

The housing landscape of Nassau County

Nassau County's housing consists of 479,044 units, with 76.1% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 3.2% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 0.2% of the housing landscape.

Housing units
479,044
0.2% year-over-year change
Housing types
Value Percent
1 unit, detached 364,695 76.1%
1 unit, attached 15,277 3.2%
2 units 26,626 5.6%
3 or 4 units 9,099 1.9%
5 to 9 units 8,303 1.7%
10 to 19 units 10,326 2.2%
20 to 49 units 14,182 3%
50 or more units 28,981 6%
Mobile home 1,171 0.2%
Boat, RV, van, etc. 384 0.1%
Homes built since 2020
3,678
75.4% year-over-year change

The age of buildings in Nassau County

In Nassau County, the median construction year is 1955. About 19.2% of homes were built before the 1940s, with another 13% going up by 1949. Most development happened in the second half of the 20th century. Then, 3.3% of homes were added from 2000 to 2009, 3.2% between 2010 and 2019, and 0.8% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 91,998 19.2% -1.3%
Built between 1940 and 1949 62,361 13% 1.0%
Built between 1950 and 1959 162,333 33.9% -1.8%
Built between 1960 and 1969 63,119 13.2% -0.2%
Built between 1970 and 1979 29,265 6.1% 5.2%
Built between 1980 and 1989 22,310 4.7% -0.4%
Built between 1990 and 1999 12,717 2.6% 2.4%
Built between 2000 and 2009 15,862 3.3% 6.2%
Built between 2010 and 2019 15,401 3.2% 4.9%
Built in 2020 or later 3,678 0.8% 75.4%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Nassau County occupancy rates

Out of the 458,166 occupied housing units in Nassau County, 82% are owner-occupied, while 18% are lived in by tenants. Meanwhile, 4.4% of all homes on the local market sit vacant.

Occupied housing units
458,166
0.5% year-over-year change
Occupancy breakdown
Renter occupied
82,700
Owner occupied
375,466
Value Percent YoY
change
Renter occupied 82,700 18% 0.3%
Owner occupied 375,466 82% 0.5%
Unoccupied housing units
4.4%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Nassau County housing costs

Housing costs in Nassau County come to a median of $2,787 per month, while tenants specifically pay a median gross rent of $2,252.

Median housing costs per month
$2,787/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Nassau County
$2,252/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Nassau County

Nassau County education at a glance

About 25.2% of the population in Nassau County went to high school, while 15.7% pursued college studies. Another 8% earned an associate degree and 26.4% hold a bachelor’s. Meanwhile, 20.8% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 43,683 4% 0.1%
High school diploma 274,527 25.2% -0.8%
College diploma 171,402 15.7% -3.7%
Associate degree 86,895 8% -0.2%
Bachelor's degree 287,934 26.4% 1.8%
Graduate degree 226,422 20.8% 3.2%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Nassau County

How much people earn in Nassau County

The average annual household income in Nassau County was $191,704 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2.1% change from the previous year. At the same time, the median income stood at $146,202, reflecting a +2% shift over the same period.

Average household income in Nassau County
$191,704/year
2.1% year-over-year change
Median household income in Nassau County
$146,202/year
1.9% year-over-year change

Nassau County income by age

In Nassau County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $171,574. Those with someone between 45 and 64 in charge, often well established professionally, earn $171,391 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $70,793, while those led by someone over 65, many of whom may be retired, have about $100,301 in earnings. Overall, 94.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $70,793 10.8%
25 - 44 $171,574 4.3%
45 - 64 $171,391 1.5%
Over 65 $100,301 2.9%
Above poverty level
1,285,103
Below poverty level
73,409
Value Percent YoY
change
Above poverty level 1,285,103 94.6% 0.1%
Below poverty level 73,409 5.4% 2.2%

Employment in Nassau County

Workforce and job types in Nassau County

The job market in Nassau County is powered by 694,825 working residents, spread across a range of industries and roles. 86.3% of the working population are employed in professional or administrative positions, while 13.7% are in hands-on or service-based jobs. Also, 10.8% run their own businesses, 61.6% are employed by private companies, and 17.9% work in the public sector.

Workforce demographics

Working population
694,825
-0.5% year-over-year change
White collar
599,876
Blue collar
94,949
Value Percent YoY change
White collar 599,876 86.3% -0.3%
Blue collar 94,949 13.7% -1.9%
Employer type
Self employees
10.8%
Private companies
61.6%
Governmental workers
17.9%
Not for profit companies
9.7%
Value Percent YoY change
Self employees 75,220 10.8% 1.0%
Private companies 427,669 61.6% -1.2%
Governmental workers 124,230 17.9% -0.5%
Not for profit companies 67,706 9.7% 2.0%
Unemployment rate
4.8%
0.3% year-over-year change

Available workforce

The unemployment rate in Nassau County stands at 4.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Nassau County

How people get around in Nassau County

In Nassau County, the average commute time is 36 minutes. Commuting methods vary: 68% of residents travel by personal vehicle and 2% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
36 min
0.0% year-over-year change
Means of transportation
Value Percent YoY change
Car 462,012 68% -2.5%
Taxicab 3,025 0.4% 18.2%
Bus or trolleybus 14,749 2.2% -3.1%
Subway or elevated 19,937 2.9% N/A
Railroad 48,409 7.1% -6.9%
Ferryboat 293 0% 33.2%
Motorcycle 268 0% 5.5%
Bicycle 1,491 0.2% 15.9%
Walk 13,776 2% -3.0%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Nassau County by zipcode?

Zipcode Population Number of households Median income Average income
11001 25,493 8,638 $150,000 $184,858
11003 45,174 12,036 $124,115 $147,954
11010 25,604 8,455 $142,321 $157,996
11020 5,676 1,707 $167,148 $235,243
11021 19,783 8,165 $120,230 $201,354
11023 9,630 3,159 $141,003 $195,376
11024 9,155 2,284 $175,300 $257,376
11030 18,051 6,205 $234,966 $377,242
11040 41,988 13,916 $154,696 $195,405
11042 141 0 $0 $0

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FAQs about Nassau County demographics 

What is the total population of Nassau County?

Nassau County has a total population of 1,389,591 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.1% compared to a year ago.

What is the gender ratio in Nassau County?

The gender ratio in Nassau County is as follows:
  • 49.2% males (683,885 residents)
  • 50.8% females (705,706 residents)

What is the median age in Nassau County?

The median age in Nassau County is 42.

What is the age distribution of the population in Nassau County?

The age distribution in Nassau County is as follows:
  • Under 15: 17.5% (243,194 residents)
  • Ages 15-24: 12.3% (170,955 residents)
  • Ages 25-44: 24.2% (336,154 residents)
  • Ages 45-64: 27.3% (379,788 residents)
  • Over 65: 18.7% (259,500 residents)

What is the racial and ethnic makeup of Nassau County?

The racial and ethnic makeup of Nassau County is as follows:
  • White: 56.8% (789,352 residents)
  • Black or African American: 11.2% (156,203 residents)
  • American Indian and Alaska Native: 0.2% (3,134 residents)
  • Asian: 12.2% (169,900 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (298 residents)
  • Two or More Races: 10.2% (142,379 residents)
  • Other: 9.2% (128,325 residents)

What percentage of the population in Nassau County are U.S.-born citizens?

U.S.-born citizens represent 75% of the population in Nassau County.

How many housing units are there in Nassau County?

There are 479,044 housing units in Nassau County, reflecting a +0.2% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Nassau County and what is the average household size?

Nassau County has a total of 458,166 households, with an average of 3 people in each.

What is the median household income in Nassau County?

Nassau County has a median household income of $146,202, representing a +1.9% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Nassau County?

The employment rate is 95.2% in Nassau County, with a workforce of 694,825 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 86.3% (599,876 residents)
  • Blue-collar workers: 13.7% (94,949 residents)

Places of employment:
  • Self-employed: 10.8% (75,220 residents)
  • Private companies: 61.6% (427,669 residents)
  • Governmental workers: 17.9% (124,230 residents)
  • Not-for-profit companies: 9.7% (67,706 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025