The 45th Assembly district of Wisconsin is one of 99 districts in the Wisconsin State Assembly. Located in southern Wisconsin, the district comprises most of southern and eastern Rock County. It includes the cities of Beloit and Evansville, and the village of Orfordville. The district also contains Beloit College. The district is represented by Democrat Clinton Anderson, since January 2023.

The 45th Assembly district is located within Wisconsin's 15th Senate district, along with the 43rd and 44th Assembly districts.

List of past representatives +List of representatives to the Wisconsin State Assembly from the 45th districtMemberPartyResidenceCounties representedTerm startTerm endRef.District created Gary K. Johnson Dem. Beloit Rock January 1, 1973 January 3, 1983 Rep. Sparta Jackson, La Crosse, Monroe January 3, 1983 January 7, 1985 Timothy Weeden Rep. Beloit Rock January 7, 1985 April 21, 1987 --Vacant-- April 21, 1987 June 17, 1987 Judy Robson Dem. Beloit June 17, 1987 January 4, 1999 Dan Schooff Dem. Rock, Walworth January 4, 1999 Chuck Benedict Dem. January 3, 2011 Amy Loudenbeck Rep. Clinton January 3, 2011 January 7, 2013 Janis Ringhand Dem. Evansville Green, Rock January 7, 2013 January 3, 2015 Mark Spreitzer Dem. Beloit January 3, 2015 January 2, 2023 Clinton Anderson Dem. January 3, 2023 Current

Electoral history YearDateElectedDefeatedTotalPluralityOther primary candidates2014Democratic12,85699.02%--unopposed--12,98312,7292016Democratic17,86798.00%18,23117,5032018Democratic14,19879.10%Lib.3,49619.48%17,95010,7022020Democratic14,45154.80%Rep.11,89545.11%26,3702,5562022Democratic11,63655.75%Rep.9,22144.18%20,8722,4152024Democratic19,86495.87%--unopposed--20,71919,009

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