Wisconsin Senate: Party Control and History

Current seats

Republican majorityDemocrats 15, Republicans 18. 33 seats; 17 for a majority.

Democrats 15Republicans 18

Control counts seats by party; coalitions and power-sharing agreements are not shown.

Members as of November 3, 2026 (Open States), before the winners of the November 3, 2026 elections take office.

Wisconsin overviewWisconsin Assembly

District map

Democrat 15Republican 18Not available 1

Loading the map.

2024: the candidate(s) with the most votes in each contest (MEDSL); contests with unreliable rows are not shown. Lines of the 2024 elections (US Census Bureau).

Members as of November 3, 2026 (Open States), before the winners of the November 3, 2026 elections take office.

Seats after each election, 1968-2022

Seats by election, table

Year	D	R	Other	Seats	Control
2022	11	22	0	33	Republican majority
2020	12	21	0	33	Republican majority
2018	13	20	0	33	Republican majority
2016	13	20	0	33	Republican majority
2014	14	19	0	33	Republican majority
2012	14	19	0	33	Republican majority
2010	14	19	0	33	Republican majority
2008	18	15	0	33	Democratic majority
2006	18	15	0	33	Democratic majority
2004	14	19	0	33	Republican majority
2002	15	18	0	33	Republican majority
2000	18	15	0	33	Democratic majority
1998	18	15	0	33	Democratic majority
1996	16	17	0	33	Republican majority
1994	16	17	0	33	Republican majority
1992	18	15	0	33	Democratic majority
1990	20	13	0	33	Democratic majority
1988	21	12	0	33	Democratic majority
1986	20	13	0	33	Democratic majority
1984	19	14	0	33	Democratic majority
1982	18	15	0	33	Democratic majority
1980	20	13	0	33	Democratic majority
1978	21	12	0	33	Democratic majority
1976	23	10	0	33	Democratic majority
1974	19	14	0	33	Democratic majority
1972	15	18	0	33	Republican majority
1970	13	20	0	33	Republican majority
1968	Not available

Carl Klarner, State Legislative Election Returns, 1967-2022: version 1.0, released June 12, 2024; a fixed historic release.

District results, 2016-2024

The candidate with the most votes in each contest.

2024: 16 contests

Incomplete in the source: counties in the file with no rows for this chamber (uncontested seats left off the ballot, or missing data).

District	Most votes	Party	Share
2	ERIC WIMBERGER	Republican	64.5%
4	DORA DRAKE	Democrat	98.5%
6	LATONYA JOHNSON	Democrat	98.5%
8	JODI HABUSH SINYKIN	Democrat	50.7%
10	ROB STAFSHOLT	Republican	62.4%
12	MARY FELZKOWSKI	Republican	67.5%
14	SARAH KEYESKI	Democrat	51.1%
16	MELISSA RATCLIFF	Democrat	97.2%
18	KRISTIN ALFHEIM	Democrat	53.2%
20	DANIEL FEYEN	Republican	70.0%
22	ROBERT W WIRCH	Democrat	95.3%
24	PATRICK TESTIN	Republican	58.7%
26	KELDA HELEN ROYS	Democrat	98.4%
28	JULIAN BRADLEY	Republican	63.1%
30	JAMIE WALL	Democrat	52.5%
32	BRAD PFAFF	Democrat	52.3%

2022: 17 contests

Incomplete in the source: counties in the file with no rows for this chamber (uncontested seats left off the ballot, or missing data).

District	Most votes	Party	Share
1	ANDRÉ JACQUE	Republican	59.5%
3	TIM CARPENTER	Democrat	69.0%
5	ROB HUTTON	Republican	53.2%
7	CHRIS J LARSON	Democrat	67.2%
9	DEVIN LEMAHIEU	Republican	93.6%
11	STEVE NASS	Republican	58.3%
13	JOHN JAGLER	Republican	96.7%
15	MARK SPREITZER	Democrat	61.4%
17	HOWARD MARKLEIN	Republican	60.1%
19	RACHAEL CABRAL-GUEVARA	Republican	54.0%
21	VAN H WANGGAARD	Republican	94.1%
23	JESSE JAMES	Republican	94.7%
25	ROMAINE ROBERT QUINN	Republican	57.0%
27	DIANNE H HESSELBEIN	Democrat	68.0%
29	CORY TOMCZYK	Republican	62.4%
31	JEFF SMITH	Democrat	50.4%
33	CHRIS KAPENGA	Republican	96.4%

2020: 16 contests

Incomplete in the source: counties in the file with no rows for this chamber (uncontested seats left off the ballot, or missing data).

District	Most votes	Party	Share
2	ROBERT L COWLES	Republican	98.3%
4	LENA C TAYLOR	Democrat	98.3%
6	LATONYA JOHNSON	Democrat	88.5%
8	ALBERTA DARLING	Republican	54.2%
10	ROB STAFSHOLT	Republican	59.9%
12	MARY CZAJA-FELZKOWSKI	Republican	65.7%
14	JOAN A BALLWEG	Republican	64.9%
16	MELISSA AGARD SARGENT	Democrat	73.4%
18	DAN FEYEN	Republican	59.1%
20	DUEY STROEBEL	Republican	98.7%
22	ROBERT W WIRCH	Democrat	96.2%
24	PATRICK TESTIN	Republican	56.4%
26	KELDA HELEN ROYS	Democrat	98.2%
28	JULIAN BRADLEY	Republican	59.6%
30	ERIC WIMBERGER	Republican	54.6%
32	BRAD PFAFF	Democrat	50.3%

2018: 17 contests

District	Most votes	Party	Share	Note
1	Andre Jacque	not in source	54.5%	seats not in source
3	Tim Carpenter	not in source	100.0%	seats not in source; one candidate
5	Dale Kooyenga	not in source	51.2%	seats not in source
7	Chris Larson	not in source	66.4%	seats not in source
9	Devin LeMahieu	not in source	58.5%	seats not in source
11	Steve Nass	not in source	99.9%	seats not in source
13	Scott Fitzgerald	not in source	59.1%	seats not in source
15	Janis Ringhand	not in source	100.0%	seats not in source
17	Howard Marklein	not in source	54.1%	seats not in source
19	Roger Roth	not in source	53.2%	seats not in source
21	Van H. Wanggaard	not in source	58.1%	seats not in source
23	Kathy Bernier	not in source	59.2%	seats not in source
25	Janet Bewley	not in source	51.1%	seats not in source
27	Jon B. Erpenbach	not in source	66.2%	seats not in source
29	Jerry Petrowski	not in source	64.2%	seats not in source
31	Jeff Smith	not in source	51.7%	seats not in source
33	Chris Kapenga	not in source	100.0%	seats not in source; one candidate

2016: 16 contests, 16 not shown

Incomplete in the source: counties in the file with no rows for this chamber (uncontested seats left off the ballot, or missing data).

District	Most votes	Party	Share	Note
2	Not shown: district codes are fragments of one contest
4	Not shown: district codes are fragments of one contest
6	Not shown: district codes are fragments of one contest
8	Not shown: district codes are fragments of one contest
10	Not shown: district codes are fragments of one contest
12	Not shown: district codes are fragments of one contest
14	Not shown: district codes are fragments of one contest
16	Not shown: district codes are fragments of one contest
18	Not shown: district codes are fragments of one contest
20	Not shown: district codes are fragments of one contest
22	Not shown: district codes are fragments of one contest
24	Not shown: district codes are fragments of one contest
26	Not shown: district codes are fragments of one contest
28	Not shown: district codes are fragments of one contest
30	Not shown: district codes are fragments of one contest
32	Not shown: district codes are fragments of one contest

MEDSL precinct returns 2016-2024: a fixed historic release; the file records no release date.

Sources

Current members: Open States (CC0 1.0), commit 3a1d876 of November 3, 2026; seat totals from openstates-metadata (MIT).

Seats after each election: Carl Klarner, State Legislative Election Returns, 1967-2022, Harvard Dataverse (CC0 1.0).

District results: MEDSL precinct returns (2018-2024 CC0 1.0; 2016 MIT License).

District lines: US Census Bureau, TIGER/Line cartographic boundaries (public domain), state legislative districts 2024, 1:500,000.

Data through November 3, 2026.