Jefferson County, New York Cemeteries
Jefferson County is located in the state of New York. It is named after Thomas Jefferson, third President of the United States of America, and president at the time the county was created in 1805. Its county seat is Watertown.
When counties were established in the Province of New York in 1683, the present Jefferson County was part of Albany County.
Jefferson County is in northeastern New York State, adjacent to the area where the Saint Lawrence River exits Lake Ontario. It is northeast of Syracuse, and northwest of Utica.
Jefferson County is at the international border with Canada. The Black River, which empties into Lake Ontario, is an important waterway in the county. Part of the Tug Hill Plateau is in the southern part of the county.
Jefferson County also includes nearby islands in the St. Lawrence River, including such large islands as Carleton Island, Grindstone Island, and Wellesley Island.
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