When counties were established in the Province of New York in 1683, the present Jefferson County was … See more

As of the census of 2000, there were 111,738 people, 40,068 households, and 28,127 families residing in the county. The population density was 88 inhabitants per square mile (34/km ). There were 54,070 housing uni… See more

Jefferson Community College in Watertown provides higher education within the county. See more

As of 2021 the sheriff is Colleen M. O'Neill. O'Neill is the first female sheriff elected in the state, and was first elected in 2014.
In 2012, the Sheriff's Office was the subject of three unrelated sexual harassment lawsuits by … See more

• Antique Boat Museum
• Boldt Castle
• Burnham Point State Park
• Canoe-Picnic Point State Park… See more