Look up Nassau County in Wiktionary, the free dictionary.

Nassau County may refer to:

• Nassau County, Florida, part of the Jacksonville metro area.
• Nassau County, New York, part of Long Island 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

• Nassau (disambiguation)

Topics referred to by the same term

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