Nassau County may refer to: *

Nassau County, Florida Nassau County is the northeasternmost county of the U.S. state of Florida. According to the 2020 United States Census, the county's population was 90,352. The county seat and the largest incorporated city is Fernandina Beach. Nassau County is ...

, part of the Jacksonville metro area. *

Nassau County, New York Nassau County ( ) is a county in the U.S. state of New York. At the 2020 U.S. census, Nassau County's population is 1,395,774. The county seat is Mineola and the largest town is Hempstead. Nassau County is situated on western Long Island ...

, part of

Long Island Long Island is a densely populated island in the southeastern region of the U.S. state of New York (state), New York, part of the New York metropolitan area. With over 8 million people, Long Island is the most populous island in the United Sta ...

in the New York City metro area. * County of Nassau, a former county and state of the Holy Roman Empire ruled by the Counts of Nassau, in modern Germany

See also