New Horizons Genealogy

"Specializing in New England and New York Colonial American Ancestry"


Nassau County New York Genealogy and History

County seat: Mineola

Try our genealogy search engine


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.

We regret that are unable to do personal research for you. All genealogical and family history records we come across are being added to this website. Please keep checking back.


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.


Nassau County New York Genealogy Records Online‌


Nassau County New York Cemetery Records

Nassau County New York Church Records

Nassau County New York Cities & Towns

Nassau County New York Military Records


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