Jefferson County, New York

Jefferson County is a county in the U.S. state of New York. As of the 2020 census, the population was 116,721. The county seat is Watertown. The county is named after Thomas Jefferson, third President of the United States of America. Jefferson County is west of Lake Ontario, and southeast from the Canada–US border. Jefferson County is mostly rural area. Fort Drum is inside Jefferson County. The 10th Mountain Division is inside Fort Drum. Jefferson County is part of New York's 21st and 24th congressional districts.

Jefferson County was founded on March 28 1805.

 History 
The area of Jefferson County used to be part of Albany County when counties first started in the Province of New York in 1683.

The area of Jefferson County used to be part of Oneida County. On March 28, 1805, an act was passed that split the area of Jefferson County from Oneida County. Watertown became the county seat of Jefferson County when this act passed. When the act was passed, Watertown was one of the smallest hamlets in the county.

Jefferson County was named the most politically tolerant places in the United States in 2019 by Amanda Ripley.

 Geography 
Jefferson County is  large. Jefferson County is the fourth biggest county in New York by area. There are  of rural area in Jefferson County, and there are  of urban area.thumb|Jefferson County is mostly rural area
 References 

 Citations 



 Other websites 

 Jefferson County webpage

 Guide to historical information
 Summary history of Jefferson County, NY and its towns
 Jefferson County NY Wiki

Category:1800s establishments in New York (state)
Category:1805 establishments in the United States
Category:New York (state) counties