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 of America. 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. Jefferson County comprises the Watertown-Fort Drum, NY Metropolitan Statistical Area. The popularity of the area as a summer tourist destination results in a dramatic increase of population during that season. In 2014, it elected Colleen M. O'Neill as the first woman county sheriff in the state. She had served with the New York State Police for 32 years. The United States Army's 10th Mountain Division is based at Fort Drum. The base had a total population of nearly 13,000 according to the 2010 census.

Founded: 1805
Named for: Thomas Jefferson
Seat: Watertown
Largest town: Le Ray
Total: 1,857 sq mi (4,809.61 km²)
Land: 1,269 sq mi (3,286.69 km²)
Water: 589 sq mi (1,525.5 km²), 32
Density: 63/sq mi (/km²)
Time zone: Eastern: UTC-5-4
Website: [www.co.jefferson.ny.us]
Official Website: http://www.co.jefferson.ny.us
Wikidata description: county in New York, United States
Wikidata id: Q115227
Wikidata label: Jefferson County
Wikidata aliases: Array
Source
Results from DuckDuckGo

Agency Contact Information