Hamilton County New York Genealogy and History

County seat: Lake Pleasant

Search Free Hamilton 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.

Hamilton 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.

Hamilton County History

For the history of Hamilton County prior to 1816, see Montgomery County, New York.

On April 12, 1816, Hamilton County was created by partitioning 1,800 square miles (4,700 km2) from Montgomery County, but due to low population it remained unorganized and administered from Montgomery County, N.Y. until it was recognized as sufficiently organized for self-government on January 1, 1838. The organization process was completed by Summer of 1847.

On April 6, 1860, Fulton County was partitioned, with 10 square miles (26 km2) of land in Sacandaga Park transferred to Hamilton County.

On May 24, 1915, land was swapped between Hamilton and Essex counties, with Hamilton ceding Fishing Brook Mountain for Indian Lake. Hamilton gained an additional 20 square miles (52 km2), whereas Essex County lost 30 square miles (78 km2). This left Hamilton with its present size of 1,830 square miles (4,700 km2).

The former town of Gilman was dissolved in 1860. The original county seat was Sageville, now part of Lake Pleasant.

Free Hamilton County New York Genealogy Records Online

Biographies	Cemetery Records	Census Records
Church Records	Cities & Towns	County Records
Family Bibles	History Topics	Military Records
Miscellaneous Data	Newspaper Data	Obituaries
School Records	Vital Records	Wills/Probate Records

Genealogy Research in Hamilton County, New York

Hamilton County Clerk
102 Co. Rd 11
Lake Pleasant, NY 12108
Phone: (518) 548-7111
Website: http://www.hamiltoncounty.com/government/departments-services#Clerk,CountyofHamilton

Adjacent counties

Franklin County - northeast
Essex County - northeast
Warren County - east
Saratoga County - southeast
Fulton County - south
Herkimer County - west
St. Lawrence County - northwest