What is the population of Nassau County?

The population of Nassau County, NY is 1,351,334.

Where is Nassau County located?

Nassau County, NY is located at latitude 40.7321700 and longitude -73.5854500. It is in United States.

What is the area of Nassau County?

The area of Nassau County, NY is 1173 km².

What is the elevation of Nassau County?

Nassau County, NY has an elevation of 24 meters (79 feet) above sea level.

What time zone is Nassau County in?

Nassau County, NY is in the America/New_York time zone.

How has the population of Nassau County changed?

The population of Nassau County, NY has increased from 55,448 (1900) to 1,351,334 (2020), a change of 2337.1%.

Nassau County, New York

Nassau County: county in New York, United States

About

Nassau County is a county located in the U.S. state of New York. As of the 2010 census, the population was 1,339,532 and a population density of 1,142 people per km². After 10 years in 2020 county had an estimated population of 1,351,334 inhabitants. Its county seat is Mineola. The county was created 127 years ago in 1898.

Nassau County locator map — Location of Nassau County on New York map.

County Snapshot

Nassau County at a glance

Nassau County currently has 121 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

121

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

New York counties

Open related pages

Largest city

Hempstead

Population 764,055

Quick Facts about Nassau County

Population	1,351,334 (2020)
Country	United States of America
State	New York (United States)
Different from	Nassau County
Twitter username	nassauexecutive
Area	1173 km²
Official name	Nassau County
Water as percent of area	37%
Land as percent of area	63%
Latitude & Longitude	40.7322,-73.5855
Named for	William III
Altitude	98 feet / 30 meters
Capital	Mineola
Establishment	January 01, 1899
Time Zone	Eastern Time Zone, UTC−05:00, UTC−04:00
Local time	21:09:31 (19th April 2026)
Density	1,152 Pop. per km² as of 2020
Population growth	0.87% (2010-2020)
Weather	68℉ Chance Rain Showers 7-days weather

HempsteadHouseSandsPoint image

Geography

Nassau County is located at 40°43'56"N 73°35'8"W (40.7321700, -73.5854500). It has 5 neighbors: Bronx, New York City, Queens County, Suffolk County and Westchester County.

Nassau County map

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The largest city of Nassau County is Hempstead with a population of 764,055. Other cities include, Oyster Bay population 296,592, Freeport population 42,705, East Meadow population 38,132 and Valley Stream population 37,196. See all Nassau County cities & populated places.

Nassau County Populated Places (more)

Cities, towns, neighborhoods & other populated places in Nassau County.

City Name	Population	Title
Hempstead	764,055	Located in Nassau County, New York, this hamlet and village is a major commercial and transportation hub.
Oyster Bay	296,592	Town on Long Island, New York, United States
Freeport	42,705	The county seat of Stephenson County, Illinois.
Hicksville	41,547	Census-designated place in Nassau County, New York
East Meadow	38,132	Hamlet and census-designated place (CDP) in Nassau County (Long Island), New York, United States
Valley Stream	37,196	Village in Nassau County, New York, United States of America
Long Beach	33,303	City in Nassau County, New York, United States
Elmont	33,198	Census-designated place in Nassau County, New York
Franklin Square	29,320	Census-designated place in Nassau County, New York
Glen Cove	27,005	City in Nassau County, New York
Plainview	26,217	City in Texas
Uniondale	24,759	Census designated-place in New York, United States
Rockville Centre	24,398	Village in Nassau County, New York, United States
Baldwin	24,033	Census designated place in New York, United States
Garden City	22,224	Village in New York, United States
Merrick	22,097	Hamlet and census-designated place in New York

Weather

68°F

Chance Rain Showers

8 to 13 mph SW Sunday

A chance of rain showers. Mostly cloudy, with a high near 68. Chance of precipitation is 40%.

7-Day Forecast

Official website of Nassau County

Official Website Twitter

Nassau County has 5 neighbours.

Bronx County borough of New York City, United States
New York City The most populous city in the United States and the center of the New York metropolitan area.
Queens County county in New York, United States
Suffolk County county in New York, United States
Westchester County county in New York, United States.

Mineola

Demographics

The population of Nassau County increased by 0.87% in 10 years.

Year	Population	% Change	Method
1900	55,448	-	estimation process
1910	83,930	33.94%	estimation process
2009	1,357,429	93.82%	census
2010	1,339,532	-1.34%	census
2011	1,346,223	0.5%	estimation process
2012	1,349,616	0.25%	estimation process
2013	1,352,193	0.19%	estimation process
2014	1,354,705	0.19%	estimation process
2015	1,354,840	0.01%	estimation process
2016	1,355,952	0.08%	estimation process
2017	1,357,293	0.1%	estimation process
2018	1,357,534	0.02%	estimation process
2019	1,356,924	-0.04%	estimation process
2020	1,351,334	-0.41%	estimation process

Map of countries with a smaller population than Nassau County

Comitatul Nassau, Comtat de Nassau, Comte de Nassau, Comté de Nassau, Condado de Nassau, Condado han Nassau, Contea di Nassau, Hrabstwo Nassau, Nasau, Nasau srjan, Nassau, Nassau Comitatus, Nassau Kun, Nassau Kūn, Nassau konderria, Nassau maakond, Nassau megye, Nassau okrug, Nasso, Okrug Naso, Quan Nassau, Quận Nassau, mqatʿt nasw, na su xian, nasa'u ka'unti, nasso jun, shhrstan nasaw nywywrk, Насау, Нассау, Нассо, Округ Насо, Նասաու շրջան, מחוז נסאו, شهرستان ناساو، نیویورک, مقاطعة ناسو, نساؤ کاؤنٹی, نساؤ کاؤنٹی، نیویارک, নাসাউ কাউন্টি, ナッソー郡, 納蘇縣

People born in Nassau County (9)

People born in Nassau County, including pop vocalist, songwriter, dance artist, and actress Taylor Dayne, professional wrestler Cliff Compton, actor Jude Ciccolella, .

More notable people

Joel Rifkin (American serial killer) he was born in 20/01/1959
George E. Killian (American basketball coach) he was born in 06/04/1924
Brooks D. Simpson (American historian) he was born in 04/08/1957
Frances C. Wilson (U.S. Marine Corps general) she was born in 20/12/1948
David Friedman (United States Ambassador to Israel) he was born in 08/08/1959
Vincent T. Muscarella he was born in 23/09/1954

Other places with the same name (1)

Nassau County, Florida county in Florida, United States with a population of 91,113 people.

New York Other Counties (more counties)

County Name	Population	Title
New York City	8,398,748	The most populous city in the United States and the center of the New York metropolitan area.
Brooklyn	2,577,000	A borough of New York City.
Queens	2,339,150	The most populous borough of New York City.
Queens County	2,225,821	County in New York, United States
Manhattan	1,644,518	The most densely populated borough of New York City.
New York County	1,611,989	County in New York state, United States of America
Suffolk County	1,474,273	County in New York, United States
The Bronx	1,455,720	The fourth most populous borough of New York City.
Bronx County	1,401,142	Borough of New York City, United States
Westchester County	965,802	County in New York, United States.
Erie County	917,241	County in New York, United States
Hempstead	764,055	Located in Nassau County, New York, this hamlet and village is a major commercial and transportation hub.
Monroe County	740,900	County in Florida, United States
Brookhaven	479,883	This town in Suffolk County, New York, is the most populous in the state.
Richmond County	475,327	County in Georgia, United States
Staten Island	474,558	The fifth most populous borough of New York City.