Jefferson County, Wisconsin
Jefferson County is a county in Wisconsin with an estimated population of 85,743 in 2023. 8 cities, towns and Census places in it are indexed here.
Largest places in Jefferson County
Watertown 22,692Fort Atkinson 12,350Jefferson 7,646Lake Mills 6,602Waterloo 3,611Johnson Creek 3,441Palmyra 1,693Sullivan 642
About Jefferson County
Jefferson County is one of the counties of Wisconsin. County governments in Wisconsin handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.