Nassau County, New York

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Nassau County, New York
County of New York State
County of Nassau
HempsteadHouseSandsPoint.jpg
Hempstead House, part of Sands Point Preserve
Location within New York
Location within New York
Map of the United States highlighting New York
New York's location within the U.S.
Founded1899
Named forWilliam of Nassau
SeatMineola
Largest townHempstead
Area
 • Total453 sq mi (1,173 km2)
 • Land285 sq mi (738 km2)
 • Water169 sq mi (438 km2), 37%
Population (est.)
 • (2017)1,369,514
 • Density4,805.3/sq mi (1,855.3/km2)
Congressional districts2nd, 3rd, 4th, 5th
Time zoneEastern: UTC−5/−4
Websitewww.nassaucountyny.gov
Footnotes: Population is 2015 Census estimate.

Nassau County is a suburban county in the New York Metropolitan area east of New York City and west of Suffolk County, in the U.S. state of New York. In 2000, 1,334,544 people lived there. It and Suffolk County are together referred to as Long Island. Until 1899 Nassau County was part of Queens County. Along with Suffolk, it was named the safest county in the United States in 2005 by Forbes magazine.