Michigan Senate: Party Control and History

Current seats

Democratic majorityDemocrats 20, Republicans 18. 38 seats; 20 for a majority.

Democrats 20Republicans 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.

Democrat 20Republican 18

Loading the map.

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 by election, table

Year	D	R	Other	Seats	Control
2022	20	18	0	38	Democratic majority
2018	16	22	0	38	Republican majority
2016	11	27	0	38	Republican majority (no regular election)
2014	11	27	0	38	Republican majority
2010	12	26	0	38	Republican majority
2006	17	21	0	38	Republican majority
2002	16	22	0	38	Republican majority
1998	15	23	0	38	Republican majority
1994	16	22	0	38	Republican majority
1990	18	20	0	38	Republican majority
1986	18	20	0	38	Republican majority
1982	20	18	0	38	Democratic majority
1978	24	14	0	38	Democratic majority
1974	24	14	0	38	Democratic majority
1970	19	19	0	38	Tied
1968	Not available

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

The candidate with the most votes in each contest.

2022: 38 contests, 3 not shown

Incomplete in the source: rows with no district (dropped).

Incomplete in the source: distinct district labels in the rows differ from districts stored.

District	Most votes	Party	Share
1	ERIKA GEISS	Democrat	71.3%
2	SYLVIA SANTANA	Democrat	67.8%
3	STEPHANIE CHANG	Democrat	74.8%
4	DARRIN CAMILLERI	Democrat	55.2%
5	DAYNA POLEHANKI	Democrat	61.0%
6	MARY CAVANAGH	Democrat	67.9%
7	JEREMY MOSS	Democrat	74.1%
8	MALLORY MCMORROW	Democrat	78.8%
9	MICHAEL WEBBER	Republican	50.3%
10	PAUL WOJNO	Democrat	57.1%
11	VERONICA KLINEFELT	Democrat	52.7%
12	KEVIN HERTEL	Democrat	51.6%
13	ROSEMARY K BAYER	Democrat	57.1%
14	SUE SHINK	Democrat	55.9%
15	JEFF IRWIN	Democrat	74.1%
16	JOSEPH BELLINO JR	Republican	64.4%
17	JONATHAN LINDSEY	Republican	65.3%
18	THOMAS A ALBERT	Republican	62.0%
19	SEAN MCCANN	Democrat	59.6%
20	ARIC NESBITT	Republican	61.0%
21	SARAH ANTHONY	Democrat	60.3%
22	LANA L THEIS	Republican	60.7%
23	JIM RUNESTAD	Republican	59.3%
24	RUTH JOHNSON	Republican	65.8%
25	DANIEL V LAUWERS	Republican	66.7%
26	KEVIN DALEY	Republican	62.4%
27	JOHN D CHERRY	Democrat	64.1%
28	SAM SINGH	Democrat	55.8%
29	WINNIE BRINKS	Democrat	60.3%
30	MARK HUIZENGA	Republican	49.2%
31	ROGER VICTORY	Republican	62.1%
32	JON C BUMSTEAD	Republican	52.8%
33	RICK OUTMAN	Republican	66.4%
34	ROGER HAUCK	Republican	64.5%
35	Not shown: several seats may be pooled under one label; district codes are fragments of one contest
36	Not shown: district codes are fragments of one contest
37	JOHN N DAMOOSE	Republican	55.6%
38	Not shown: several seats may be pooled under one label

2018: 39 contests

District	Most votes	Party	Share	Note
1	STEPHANIE CHANG	Democrat	72.0%
2	ADAM HOLLIER	Democrat	75.7%
2 (special)	ADAM HOLLIER	Democrat	100.0%	one candidate
3	SYLVIA SANTANA	Democrat	81.8%
4	MARSHALL BULLOCK	Democrat	78.3%
5	BETTY JEAN ALEXANDER	Democrat	77.4%
6	ERIKA GEISS	Democrat	61.4%
7	DAYNA POLEHANKI	Democrat	50.6%
8	PETER J LUCIDO	Republican	61.8%
9	PAUL WOJNO	Democrat	65.9%
10	MICHAEL MACDONALD	Republican	51.0%
11	JEREMY MOSS	Democrat	76.7%
12	ROSEMARY BAYER	Democrat	49.4%
13	MALLORY MCMORROW	Democrat	51.9%
14	RUTH JOHNSON	Republican	55.7%
15	JIM RUNESTAD	Republican	51.7%
16	MIKE SHIRKEY	Republican	62.7%
17	DALE W ZORN	Republican	57.9%
18	JEFF IRWIN	Democrat	76.6%
19	JOHN BIZON	Republican	58.6%
20	SEAN MCCANN	Democrat	53.1%
21	KIM LASATA	Republican	58.1%
22	LANA THEIS	Republican	56.0%
23	CURTIS HERTEL JR	Democrat	68.5%
24	TOM BARRETT	Republican	53.5%
25	DAN LAUWERS	Republican	64.0%
26	ARIC NESBITT	Republican	56.7%
27	JIM ANANICH	Democrat	71.2%
28	PETER MACGREGOR	Republican	58.4%
29	WINNIE BRINKS	Democrat	56.9%
30	ROGER VICTORY	Republican	63.2%
31	KEVIN DALEY	Republican	60.2%
32	KEN HORN	Republican	55.5%
33	RICK OUTMAN	Republican	58.8%
34	JON BUMSTEAD	Republican	50.7%
35	CURT VANDERWALL	Republican	63.2%
36	JIM STAMAS	Republican	64.3%
37	WAYNE SCHMIDT	Republican	59.0%
38	ED MCBROOM	Republican	54.6%

2016: 1 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	Note
4 (special)	CONYERS, IAN	not in source	76.5%	seats not in source

Not available: 2024, 2020.

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.