None of the households in Jefferson County, WI reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
97.5% of the residents in Jefferson County, WI are U.S. citizens.
Jefferson County, WI borders Dane County, WI, Dodge County, WI, Rock County, WI, Walworth County, WI, and Waukesha County, WI.