• county
  • FIPS 36059
  • Largest town: Hempstead

Nassau County, New York

Nassau County had 1,392,438 residents in the Census Vintage 2024 estimate, on 284.5 square miles of land. It ranks 5th of 62 in New York by population and 54th by land area.

Population
1,392,438
#5 of 62 in New York · #29 in US
Area
284.5 sq mi
#54 of 62 in New York · #2,833 in US
Density
4,894 / sq mi
#6 of 62 in New York · #19 in US
Median household income
$140,466
#1 of 62 in New York · #8 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Nassau County within New York. Pin: Albany.

Measure from here

Tools and pages that start from Nassau County

Nassau County population, land area and income

Nassau County had 1,392,438 residents in the Census Vintage 2024 estimate, on 284.5 square miles of land. It ranks 5th of 62 in New York by population and 54th by land area. That works out to 4,893.6 people per square mile, 50.8 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in New York has 85,936 residents, so Nassau County is 16.2 times that size.

Its SAIPE 2023 median household income of $140,466 is the 8th highest among 3,143 counties with an estimate.

National rank among 3,144

Population

1,392,438

3144th1st

29th of 3,144 (US)

Land area

285 sq mi

3144th1st

2833rd of 3,144 (US)

Density

4,893.6 / sq mi

3144th1st

19th of 3,144 (US)

Median household income

$140,466

3143rd1st

8th of 3,143 (US)

Rank within New York (62)

Population

1,392,438

62nd1st

5th of 62 (NY)

Land area

285 sq mi

62nd1st

54th of 62 (NY)

Density

4,893.6 / sq mi

62nd1st

6th of 62 (NY)

Median household income

$140,466

62nd1st

1st of 62 (NY)

How Nassau County's population changed since 2020

Nassau County gained 1,854 residents between the July 2020 and July 2024 estimates, a rise of 0.1%. That ranks 20th of 62 in New York for growth. The median New York county changed by -0.8%, and the state as a whole by -1.2%.

Since the April 2020 estimates base, Nassau County recorded 58,478 births and 50,746 deaths, a natural change of +7,732. Net international migration added +19,356 and net domestic migration, people moving to or from other US counties, came to -31,466. The largest single component was domestic migration, which removed 31,466 people.

1.39M20201.39M20211.39M20221.39M20231.39M2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
58,478
Deaths
50,746
Net international migration
+19,356
Net domestic migration
-31,466
Change, July 2023 to July 2024
+6,386

Where Nassau County is

The Census internal point of Nassau County is at 40.729600, -73.589400. It sits in UTM zone 18N. The map shades New York's 62 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Nassau County outlined. Dots are towns of 1,000+ people with residents in it.

Tompkins County: +5.8%Yates County: -1.3%Suffolk County: +0.9%Broome County: -0.9%Cortland County: -1.7%Fulton County: -2.0%Ulster County: +0.9%Rockland County: +3.2%Essex County: -1.5%Westchester County: +0.5%Niagara County: -1.2%Dutchess County: +1.4%Seneca County: -2.6%Onondaga County: -0.9%Tioga County: -1.6%Erie County: -0.2%Wayne County: -0.5%Delaware County: -0.1%Greene County: -1.8%Schenectady County: +1.9%Allegany County: -0.1%Rensselaer County: -0.1%Monroe County: -0.7%Warren County: -0.5%Livingston County: -0.1%Madison County: -1.3%Jefferson County: -2.5%Sullivan County: +2.5%Lewis County: +0.0%Oswego County: +0.7%Putnam County: +0.8%New York County: -1.1%Columbia County: -1.8%St. Lawrence County: -2.0%Schuyler County: -4.1%Franklin County: -0.3%Steuben County: -1.4%Cayuga County: -2.1%Oneida County: -1.2%Chemung County: -3.1%Herkimer County: -0.7%Schoharie County: +1.3%Cattaraugus County: -2.0%Chautauqua County: -2.6%Chenango County: -2.8%Hamilton County: +0.2%Orange County: +2.7%Washington County: -2.1%Ontario County: +0.6%Bronx County: -5.1%Wyoming County: -1.5%Clinton County: -2.3%Orleans County: -1.0%Montgomery County: +0.3%Nassau County: +0.1%Kings County: -3.6%Genesee County: -1.2%Otsego County: +3.7%Albany County: +1.9%Queens County: -3.1%Richmond County: +0.6%Saratoga County: +1.9%
Change 2020 to 2024
  1. < -2.0%
  2. < -1.2%
  3. < -0.2%
  4. < +0.7%
  5. ≥ +0.7%
no data

Orange pin: Nassau County internal point. Dark pin: Albany.

Internal point

Decimal
40.729600, -73.589400
DMS
40°43'46.56"N 73°35'21.84"W
UTM
18N 619118.9E 4509697.7N
Geohash
dr5xtqtg4
Plus code
87G8PCH6+R6

Towns in Nassau County

58 incorporated places of 1,000+ people have residents in Nassau County, 532,358 people together, or 38% of the county. Each figure counts only the part of the town inside Nassau County; towns marked "part" extend into another county. The largest is Hempstead with 59,569.

  1. 01Hempstead59,569
  2. 02Freeport44,028
  3. 03Valley Stream40,232
  4. 04Long Beach34,777
  5. 05Glen Cove28,088
  6. 06Rockville Centre25,718
  7. 07Garden City22,993
  8. 08Mineola21,305
  9. 09Lynbrook20,684
  10. 10Massapequa Park16,922
  11. 11Floral Park15,966
  12. 12Westbury15,871
  13. 13Great Neck11,075
  14. 14New Hyde Park10,220
  15. 15East Rockaway10,064
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Nassau County

The Census 2024 county adjacency file lists 5 neighbors for Nassau County, including 1 across a state line. The most populous is Queens County, NY, with 2,316,841 residents. Distances run between Census internal points in a straight line.

Distance to Albany and the nearest big city

Albany is 133.2 miles N of Nassau County's internal point in a straight line. The nearest place of 100,000 or more is New York, NY (population 8,478,072), 18.9 miles away. The nearest place of 10,000 or more is Westbury, NY (population 15,871), 2.1 miles away.

Nassau County FIPS code

The FIPS code of Nassau County is 36059: state code 36 for New York plus county code 059. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $140,466.

Questions people ask

What is the population of Nassau County, New York?

The Census Vintage 2024 estimate for July 1, 2024 is 1,392,438. That is up 1,854 people (0.1%) from the July 2020 estimate of 1,390,584.

What is the FIPS code of Nassau County?

36059. The first two digits (36) are New York; the last three (059) identify the county.

What is the largest town in Nassau County?

Hempstead, with 59,569 residents inside Nassau County in 2024.

Which counties border Nassau County?

5 county-equivalents border it in the Census 2024 adjacency file: Queens County, NY; Suffolk County, NY; Bronx County, NY; Westchester County, NY; Western Connecticut Planning Region, CT.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.