New Horizons Genealogy

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


Jefferson County New York Genealogy and History

County seat: Watertown

Try our genealogy search engine


Search Free Jefferson 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.

Jefferson 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.


Jefferson County New York History

Jefferson County was split off from Oneida County in 1805. In 1817, Carleton Island, captured from the British in the War of 1812, was annexed to the county. During the late eighteenth and nineteenth centuries, the county was largely developed for agriculture.


Jefferson County Genealogy Records

BiographiesCemetery RecordsCensusRecords
Church Records Cities & Towns County Records
Family Bibles History Topics Military Records
Miscellaneous Data Newspaper DataObituaries
School Records Vital RecordsWills/Probate Records

Genealogy Research in Jefferson County, New York

Jefferson County Clerk
175 Arsenal Street
Watertown, NY 13601
Phone: (315) 785-3312
Website: http://www.co.jefferson.ny.us/


Adjacent counties


[ New York Genealogy ]