Town guide
Sumner
Wisconsin · WI · Jefferson County
About Sumner
Town in Wisconsin, United States846Population
31.3 sq miArea
797 ftElevation
Sumner is a town in Jefferson County, Wisconsin, United States. The population was 846 at the 2020 census. The census-designated place of Lake Koshkonong and the unincorporated communities of Busseyville, Carcajou, Glenn Oaks Beach, Koshkonong Manor, and North Shore are located within the town. The community of Blackhawk Island is located partially in the town.
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