Suffolk County, New York

Suffolk County: County in New York, United States

About

Suffolk County is a county located in the U.S. state of New York. As of the 2010 census, the population was 1,493,350 and a population density of 243 people per km². After 10 years in 2020 county had an estimated population of 1,474,273 inhabitants. Its county seat is Riverhead. The county was created 342 years ago in 1682.

Suffolk County locator map
Location of Suffolk County on New York map.

Quick Facts about Suffolk County

Population : 1,474,273 (2020)
Country : United States of America
State : New York (United States)
Different from : Suffolk, Suffolk County
Area : 6146 km2
Water as percent of area : 62%
Land as percent of area : 38%
Named for : Suffolk
Altitude : 49 feet / 15 meters
Capital : Riverhead
Establishment : January 01, 1683
Time Zone : America/New_York
Local time : 03:39:59 (22nd February 2025)
Density : 240 Pop. per km² as of 2020
Population growth : -1.29% (2010-2020)
WesthamptonInnerWaterway image
WesthamptonInnerWaterway
WesthamptonInnerWaterway image
WesthamptonInnerWaterway image

Geography

Suffolk County is located at 40°56'26"N 72°41'7"W (40.9404600, -72.6852400). It has 6 neighbors: Fairfield County, Middlesex County, New Haven County, New London County, Nassau County and Washington County.

Suffolk County map

Click "full screen" full screen map icon to open full mode. View satellite images

The largest city of Suffolk County is Babylon with a population of 218,223. Other cities include, Holbrook population 27,195, Melville population 18,985, East Setauket population 17,006 and Mastic Beach population 14,841. See all Suffolk County cities & populated places.

Suffolk County Populated Places (more)

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

City Name Population Title
Brookhaven 479,883 Town in Suffolk County, New York, United States
Islip 322,328 Town in New York, United States
Babylon 218,223 A town in Suffolk County, New York.
Huntington 200,102 Town in Suffolk County, New York, United States
Smithtown 110,876 Census-designated place in Suffolk County, New York
Brentwood 60,664 Census-designated place in Suffolk County, New York
Southampton 58,549 Town in Suffolk County, New York, partly on the South Fork of Long Island, USA
West Babylon 43,213 Census-designated place in Suffolk County, New York
Coram 39,113 Census-designated place in Suffolk County, New York
Commack 36,124 Census-designated place in Suffolk County, New York
Central Islip 34,450 Census-designated place in Suffolk County, New York
Riverhead 33,434 Town in New York
Huntington Station 33,029 Census-designated place in Suffolk County, New York
Centereach 31,578 Census-designated place in Suffolk County, New York
West Islip 28,335 Census-designated place in Suffolk County, New York
Shirley 27,854 Census-designated place in New York, USA

Suffolk County has 6 neighbours.

  • Riverhead

Demographics

According to census records, the population of Suffolk County decreased by 1.29% in 10 years.

Year Population % Change Method
2010 1,493,350 - census
2011 1,498,892 0.37% estimation process
2012 1,496,982 -0.13% estimation process
2013 1,497,346 0.02% estimation process
2014 1,495,525 -0.12% estimation process
2015 1,491,967 -0.24% estimation process
2016 1,486,406 -0.37% estimation process
2017 1,483,358 -0.21% estimation process
2018 1,480,830 -0.17% estimation process
2019 1,476,601 -0.29% estimation process
2020 1,474,273 -0.16% estimation process
Map of countries with a smaller population than Suffolk County

Comitatul Suffolk, Comte de Suffolk, Comté de Suffolk, Condado de Suffolk, Condado han Suffolk, Contea di Suffolk, Hrabstwo Suffolk, Okrug Safok, Saffolk, Safolk srjan, Suffolk, Suffolk Comitatus, Suffolk Kun, Suffolk Kūn, Suffolk konderria, Suffolk megye, Suffolk okrug, Suffolki maakond, Sufolk, mqatʿt swfwlk, safoku jun, saphoka ka'unti, shhrstan safwlk nywywrk, su fu ke jun, Округ Сафок, Саффолк, Съфолк, Սաֆոլկ շրջան, سفالک کاؤنٹی, سفوک کاؤنٹی، نیویارک, شهرستان سافولک، نیویورک, مقاطعة سوفولك, সাফোক কাউন্টি, サフォーク郡, 蘇福克郡

People born in Suffolk County (12)

People born in Suffolk County, including United States Marine Arthur J. Nascarella, magazine publisher Eric Corley, football player and coach Ed Danowski, .

List

  • Mercator Cooper (American whaler) he was born in 29/09/1803
  • Michael Plumb (American equestrian) he was born in 28/03/1940
  • Vladimir Nikiforov (American ice hockey player) he was born in 07/10/1987
  • Julie Halston (American actress) she was born in 07/12/1954
  • Lindsay Gulin (American baseball player) he was born in 22/11/1976
  • William E. Woodruff (first Treasurer of Arkansas) he was born in 24/12/1795
  • Benjamin Franklin Conklin (American sea captain) he was born in 01/01/1832
  • Jackie Tonawanda (American boxer) she was born in 04/09/1933
  • Meagan Cignoli (American photographer, filmmaker, and businessperson)

Other places with the same name (2)

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
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
Nassau County 1,351,334 County in New York, 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 Town in Nassau County, New York
Monroe County 740,900 County in Florida, United States
Brookhaven 479,883 Town in Suffolk County, New York, United States
Richmond County 475,327 County in Georgia, United States
Staten Island 474,558 The fifth most populous borough of New York City.