The 99th Assembly district of Wisconsin is one of 99 districts in the Wisconsin State Assembly. Located in southeastern Wisconsin, the district comprises parts of northwest Waukesha County, northeast Jefferson County, and southeast Dodge County. It includes the cities of Oconomowoc and part of the city of Hartford, and the villages of Chenequa, Hartland, Lac La Belle, Nashotah, and Neosho. The district is represented by Republican Barbara Dittrich, since January 2025; Dittrich previously represented the 38th district from 2019 to 2025.
The 99th Assembly district is located within Wisconsin's 33rd Senate district, along with the 97th and 98th Assembly districts.
List of past representatives +List of representatives to the Wisconsin State Assembly from the 99th districtMemberPartyResidenceCounties representedTerm startTerm endRef.District created Kenneth Merkel Rep. Brookfield Waukesha January 1, 1973 January 6, 1975 Susan Engeleiter Rep. January 6, 1975 January 1, 1979 John M. Young Rep. January 1, 1979 January 3, 1983 Dem. Sun Prairie Dane January 3, 1983 January 7, 1985 John M. Young Rep. Brookfield Milwaukee, Waukesha January 7, 1985 January 5, 1987 Margaret Farrow Rep. Elm Grove January 5, 1987 January 2, 1989 --Vacant-- January 2, 1989 September 22, 1989 Frank UrbanRep. Brookfield September 22, 1989 January 6, 2003 Waukesha Michael A. Lehman Rep. Hartford Dodge, Waukesha January 6, 2003 January 3, 2005 Don Pridemore Rep. January 3, 2005 January 7, 2013 Chris Kapenga Rep. Delafield Waukesha January 7, 2013 August 6, 2015 --Vacant-- August 6, 2015 October 9, 2015 Cindi Duchow Rep. Delafield October 9, 2015 January 6, 2025 Jefferson, Waukesha Barbara Dittrich Rep. Oconomowoc Dodge, Jefferson, Waukesha January 6, 2025 Current
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