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 2018, 1,358,343 people lived there. It lies in western Long Island, and is bordered by Suffolk County to the east and by the New York City boroughs of Brooklyn and Queens to the west. About 1,525,000 people lived there. Until 1899, Nassau County was part of Queens County. The county seat is Mineola. Along with Suffolk, it was named the safest county in the United States in 2005 by Forbes.
Hamlets in Nassau County include Manhasset, New York.
New York (state) counties
1899 establishments in the United States
1890s establishments in New York (state)