Wisconsin's 99th Assembly district

The 99th Assembly district of Wisconsin is one of 99 districts in the Wisconsin State Assembly.^[1] 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.^[2] The district is represented by Republican Barbara Dittrich, since January 2025; Dittrich previously represented the 38th district from 2019 to 2025.^[3]

Wisconsin's 99th State Assembly district
From 2024 to 2031 From 2022 to 2023 From 2012 to 2021 2024 map defined in 2023 Wisc. Act 94 2022 map defined in Johnson v. Wisconsin Elections Commission 2011 map was defined in 2011 Wisc. Act 43
Assemblymember	Barbara Dittrich R–Oconomowoc since January 6, 2025 (0 years)
Demographics	93.5% White 0.79% Black 2.4% Hispanic 1.45% Asian 1.09% Native American 0.11% Hawaiian/Pacific Islander
Population (2020)  • Voting age	59,032 45,709
Website	Official website
Notes	Southeast Wisconsin

The 99th Assembly district is located within Wisconsin's 33rd Senate district, along with the 97th and 98th Assembly districts.^[4]

• 
  Downtown Oconomowoc

List of past representatives

List of representatives to the Wisconsin State Assembly from the 99th district

Member	Party	Residence	Counties represented	Term start	Term end	Ref.
District created
Kenneth Merkel	Rep.	Brookfield	Waukesha	January 1, 1973	January 6, 1975	[5]
Susan Engeleiter	Rep.	Brookfield		January 6, 1975	January 1, 1979	[6]
John M. Young	Rep.	Brookfield		January 1, 1979	January 3, 1983	[7]
Thomas A. Loftus	Dem.	Sun Prairie	Dane	January 3, 1983	January 7, 1985	[8]
John M. Young	Rep.	Brookfield	Milwaukee, Waukesha	January 7, 1985	January 5, 1987	[9]
Margaret Farrow	Rep.	Elm Grove		January 5, 1987	January 2, 1989	[10]
--Vacant--				January 2, 1989	September 22, 1989
Frank Urban	Rep.	Brookfield		September 22, 1989	January 6, 2003	[11]
			Waukesha
Michael A. Lehman	Rep.	Hartford	Dodge, Waukesha	January 6, 2003	January 3, 2005	[12]
Don Pridemore	Rep.	Hartford		January 3, 2005	January 7, 2013	[13]
Chris Kapenga	Rep.	Delafield	Waukesha	January 7, 2013	August 6, 2015	[14]
--Vacant--				August 6, 2015	October 9, 2015
Cindi Duchow	Rep.	Delafield		October 9, 2015	January 6, 2025	[15]
			Jefferson, Waukesha
Barbara Dittrich	Rep.	Oconomowoc	Dodge, Jefferson, Waukesha	January 6, 2025	Current	[3]