en Wisconsin's 99th Assembly district

Wisconsin's 99th
State Assembly district
Wisconsin's 99th; State Assembly district
	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 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]

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]
Frank Urban	Rep.	Brookfield	Waukesha	September 22, 1989	January 6, 2003	^[11]
Michael A. Lehman	Rep.	Hartford	Dodge, Waukesha	January 6, 2003	January 3, 2005	^[12]
Don Pridemore	Rep.	Hartford	Dodge, Waukesha	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]
Cindi Duchow	Rep.	Delafield	Jefferson, Waukesha	October 9, 2015	January 6, 2025	^[15]
Barbara Dittrich	Rep.	Oconomowoc	Dodge, Jefferson, Waukesha	January 6, 2025	Current	^[3]

References

^ "Assembly District 99". Wisconsin Legislature. Retrieved February 6, 2021.
^ "Wisconsin Legislative Districts - Assembly District 99 Boundaries". Wisconsin Legislature. Retrieved February 6, 2021.
^ ^a ^b "Representative Barbara Dittrich". Wisconsin Legislature. 2025. Retrieved January 8, 2025.
^ An Act ... relating to: legislative redistricting (Act 94). Wisconsin Legislature. 2023. Retrieved February 23, 2024.
^ Wisconsin Legislative Reference Bureau (1973). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1973 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (1977). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1977 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (1981). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1981-1982 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (1983). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1983-1984 Blue Book (Report). State of Wisconsin. pp. 52–53. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (1985). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1985-1986 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (1987). "Biographies" (PDF). In Theobald, H. Rupert; Barish, Lawrence S. (eds.). The state of Wisconsin 1987-1988 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (1999). "Biographies" (PDF). In Barish, Lawrence S.; Meloy, Patricia E. (eds.). State of Wisconsin 1999-2000 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (2003). "Biographies" (PDF). In Barish, Lawrence S. (ed.). State of Wisconsin 2003-2004 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.
^ Wisconsin Legislative Reference Bureau (2011). "Biographies" (PDF). In Barish, Lawrence S.; Lemanski, Lynn (eds.). State of Wisconsin 2011-2012 Blue Book (Report). State of Wisconsin. pp. 83–84. ISBN 978-0-9752820-1-4. Retrieved February 6, 2021.
^ "Representative Chris Kapenga". Wisconsin Legislature. Retrieved February 6, 2021.
^ "Representative Cindi Duchow". Wisconsin Legislature. 2021. Retrieved February 6, 2021.

[1] "Assembly District 99". Wisconsin Legislature. Retrieved February 6, 2021.

[2] "Wisconsin Legislative Districts - Assembly District 99 Boundaries". Wisconsin Legislature. Retrieved February 6, 2021.

[ditt-3] "Representative Barbara Dittrich". Wisconsin Legislature. 2025. Retrieved January 8, 2025.

[4] An Act ... relating to: legislative redistricting (Act 94). Wisconsin Legislature. 2023. Retrieved February 23, 2024.

[5] Wisconsin Legislative Reference Bureau (1973). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1973 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[6] Wisconsin Legislative Reference Bureau (1977). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1977 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[7] Wisconsin Legislative Reference Bureau (1981). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1981-1982 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[8] Wisconsin Legislative Reference Bureau (1983). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1983-1984 Blue Book (Report). State of Wisconsin. pp. 52–53. Retrieved February 6, 2021.

[9] Wisconsin Legislative Reference Bureau (1985). "Biographies" (PDF). In Theobald, H. Rupert; Robbins, Patricia V. (eds.). The state of Wisconsin 1985-1986 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[10] Wisconsin Legislative Reference Bureau (1987). "Biographies" (PDF). In Theobald, H. Rupert; Barish, Lawrence S. (eds.). The state of Wisconsin 1987-1988 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[11] Wisconsin Legislative Reference Bureau (1999). "Biographies" (PDF). In Barish, Lawrence S.; Meloy, Patricia E. (eds.). State of Wisconsin 1999-2000 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[12] Wisconsin Legislative Reference Bureau (2003). "Biographies" (PDF). In Barish, Lawrence S. (ed.). State of Wisconsin 2003-2004 Blue Book (Report). State of Wisconsin. pp. 86–87. Retrieved February 6, 2021.

[13] Wisconsin Legislative Reference Bureau (2011). "Biographies" (PDF). In Barish, Lawrence S.; Lemanski, Lynn (eds.). State of Wisconsin 2011-2012 Blue Book (Report). State of Wisconsin. pp. 83–84. ISBN 978-0-9752820-1-4. Retrieved February 6, 2021.

[14] "Representative Chris Kapenga". Wisconsin Legislature. Retrieved February 6, 2021.

[duch-15] "Representative Cindi Duchow". Wisconsin Legislature. 2021. Retrieved February 6, 2021.

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Wisconsin's 99th Assembly district

List of past representatives

References

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