Nassau County New York Genealogy and History
County seat: Mineola
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Search Free Nassau County New York Genealogy and Family History Records Online including census, cemetery, vital, military and other genealogical and historical records that can be used for your family history research.
Nassau County, New York genealogy and family history page is a place where you can come in and research your genealogy and family history. We also do our best to provide a history of the area, to provide you with an overview of the time in which your ancestors lived.
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Nassau County New York History
The area now designated Nassau County was originally the eastern 70% of Queens County, one of the original 12 counties formed in 1683, and was then contained within two towns: Hempstead and Oyster Bay. In 1784, the Town of North Hempstead, was formed through secession by the northern portions of the Town of Hempstead. Nassau County was formed in 1899 by the division of Queens County, after the western portion of Queens had become a borough of New York City in 1898, as the three easternmost towns seceded from the county.
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Genealogy Research in Nassau County, New York
Nassau County Clerk
240 Old Country Road
Mineola, NY 11501
Phone: 516-571-2664
Website: https://www.nassaucountyny.gov/3760/Contact-Us
Adjacent counties
- Bronx County - Northwest
- Fairfield County, Connecticut - North
- Queens County — west
- Suffolk County — east
- Westchester County — northwes