Ixonia is a town in Jefferson County, Wisconsin. The population was 4,385 at the time of the 2010 census. The unincorporated communities of Ixonia and Pipersville are located within the town.

Jefferson County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 84,900. Its county seat is Jefferson. Jefferson County comprises the Watertown-Fort Atkinson, WI Micropolitan Statistical Area, which is also included in the Milwaukee-Racine-Waukesha, WI Combined Statistical Area.