Jefferson County Map
The County of Jefferson is located in the State of New York. Find directions to Jefferson County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Jefferson County population is estimated at 108,095 people. The Jefferson County time zone is Eastern Daylight Time which is 5 hours behind Coordinated Universal Time (UTC).
Nearby counties include Cayuga County, Lewis County, Oswego County, St. Lawrence County.
Top cities include Le Ray, Wilna, Brownville, Clayton, Adams