page_title: Suffolk County, New York
section_title: Suffolk County Executives
hierarchical_section_title: Suffolk County, New York / Law and government / Suffolk County Executives
caption_attribution_description: English: H. Lee Dennison w:Suffolk County, New York w:County Executive Building in w:Hauppauge, New York
context_page_description: Suffolk County is a predominantly suburban county and is the easternmost county in the U.S. state of New York. As of the 2010 census, the county's population was 1,493,350, estimated to have decreased slightly to 1,476,601 in 2019, making it the fourth-most populous county in New York. Its county seat is Riverhead, though most county offices are in Hauppauge. The county was named after the county of Suffolk in England, from where its earliest European settlers came.
  Suffolk County incorporates the easternmost extreme of the New York City metropolitan area. The largest of Long Island's four counties and the second-largest of 62 counties in New York State, Suffolk measures 86 miles in length and 26 miles in width at its widest.
  Major scientific research facilities in Suffolk County include Brookhaven National Laboratory in Upton, Cold Spring Harbor Laboratory in Huntington, and Plum Island Animal Disease Center on Plum Island.
  Suffolk is the largest county in population in New York State outside of New York City, and the fourth most populous county in the state overall, behind Brooklyn, Queens and Manhattan.
caption: H. Lee Dennison County Executive Building in Hauppauge
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