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Jefferson County, New York

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Jefferson County, New York
Old Jefferson County Courthouse, Arsenal & Sherman Streets, Watertown (Jefferson County, New York) — Public domain, Design Photographics · source

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About Jefferson County

Jefferson County is a county on the northern border of the U.S. state of New York. As of the 2020 census, the population was 116,721. Its county seat is Watertown. The county is named after Thomas Jefferson, third President of the United States. It is adjacent to Lake Ontario, southeast from the Canada–US border of Ontario. The county is part of the North Country region of the state.

Description adapted from Wikipedia, CC BY-SA 4.0.

Facts

Jefferson County at a glance

County seat
Watertown
Population
116,721 (2020)
Land area
1,857 sq mi
Founded
1805

Communities

Largest communities in Jefferson County

  1. Le Ray25,574
  2. Watertown County seat24,685
  3. Fort Drum15,896
  4. Brownville5,842
  5. Wilna5,732

Background

History of Jefferson County

When counties were established in the Province of New York in 1683, the present Jefferson County was part of Albany County. This was an enormous county, including the northern part of New York State as well as all of the present State of Vermont and, in theory, extending westward to the Pacific Ocean. This county was reduced in size on July 3, 1766, by the creation of Cumberland County, and further on March 16, 1770, by the creation of Gloucester County, both containing territory now in Vermont. On March 12, 1772, what was left of Albany County was split into three parts, one remaining under the name Albany County. One of the other pieces, Tryon County, contained the western portion (and thus, since no western boundary was specified, theoretically still extended west to the Pacific).

Adapted from Wikipedia, CC BY-SA 4.0.

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