Illinois Senate: Party Control and History

Current seats

Democratic majorityDemocrats 40, Republicans 19. 59 seats; 30 for a majority.

Democrats 40Republicans 19

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.

Illinois overviewIllinois House

District map

Democrat 40Republican 19

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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

No majority line: the chamber changed size (58 to 59 seats).

Seats by election, table

Year	D	R	Other	Seats	Control
2022	40	19	0	59	Democratic majority
2020	41	18	0	59	Democratic majority
2018	40	19	0	59	Democratic majority
2016	37	22	0	59	Democratic majority
2014	39	20	0	59	Democratic majority
2012	40	19	0	59	Democratic majority
2010	35	24	0	59	Democratic majority
2008	37	22	0	59	Democratic majority
2006	37	22	0	59	Democratic majority
2004	31	27	1	59	Democratic majority
2002	32	26	1	59	Democratic majority
2000	27	32	0	59	Republican majority
1998	28	31	0	59	Republican majority
1996	29	30	0	59	Republican majority
1994	26	33	0	59	Republican majority
1992	27	32	0	59	Republican majority
1990	31	28	0	59	Democratic majority
1988	31	28	0	59	Democratic majority
1986	31	28	0	59	Democratic majority
1984	31	28	0	59	Democratic majority
1982	33	26	0	59	Democratic majority
1980	30	29	0	59	Democratic majority
1978	32	27	0	59	Democratic majority
1976	34	25	0	59	Democratic majority
1974	34	25	0	59	Democratic majority
1972	29	30	0	59	Republican majority
1970	29	29	0	58	Tied
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: 24 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
1	JAVIER LOERA CERVANTES	Democrat	100.0%	one candidate
4	KIMBERLY A LIGHTFORD	Democrat	76.4%
5	LAKESIA COLLINS	Democrat	100.0%	one candidate
7	MIKE SIMMONS	Democrat	100.0%	one candidate
10	ROBERT MARTWICK	Democrat	60.9%
13	ROBERT PETERS	Democrat	100.0%	one candidate
16	WILLIE PRESTON	Democrat	100.0%	one candidate
19	MICHAEL E HASTINGS	Democrat	56.4%
20	GRACIELA GUZMAN	Democrat	81.2%
22	CRISTINA CASTRO	Democrat	100.0%	one candidate
25	KARINA VILLA	Democrat	58.9%
27	MARK L WALKER	Democrat	57.5%
28	LAURA M MURPHY	Democrat	100.0%	one candidate
31	MARY EDLY-ALLEN	Democrat	58.2%
34	STEVE STADELMAN	Democrat	62.1%
37	LI ARELLANO JR	Republican	100.0%	one candidate
40	PATRICK JOYCE	Democrat	56.4%
43	RACHEL VENTURA	Democrat	58.2%
46	DAVE KOEHLER	Democrat	57.6%
49	MEG LOUGHRAN CAPPEL	Democrat	56.0%
52	PAUL N FARACI	Democrat	63.2%
53	CHRIS BALKEMA	Republican	100.0%	one candidate
55	JASON PLUMMER	Republican	100.0%	one candidate
58	TERRI BRYANT	Republican	100.0%	one candidate

2022: 58 contests, 6 not shown

District	Most votes	Party	Share	Note
1	Not shown: district codes are fragments of one contest
3	MATTIE HUNTER	Democrat	100.0%	one candidate
4	KIMBERLY A LIGHTFORD	Democrat	100.0%	one candidate
5	Not shown: district codes are fragments of one contest
6	SARA FEIGENHOLTZ	Democrat	83.0%
7	MIKE SIMMONS	Democrat	100.0%	one candidate
8	RAM VILLIVALAM	Democrat	100.0%	one candidate
9	LAURA FINE	Democrat	76.4%
10	Not shown: district codes are fragments of one contest
11	MIKE PORFIRIO	Democrat	66.2%
12	CELINA VILLANUEVA	Democrat	100.0%	one candidate
13	ROBERT PETERS	Democrat	100.0%	one candidate
14	EMIL JONES III	Democrat	100.0%	one candidate
15	Not shown: district codes are fragments of one contest
16	WILLIE PRESTON	Democrat	100.0%	one candidate
17	ELGIE R SIMS JR	Democrat	98.8%
18	BILL CUNNINGHAM	Democrat	59.4%
19	Not shown: district codes are fragments of one contest
20	CRISTINA PACIONE-ZAYAS	Democrat	86.3%
21	LAURA ELLMAN	Democrat	58.8%
22	CRISTINA CASTRO	Democrat	100.0%	one candidate
23	SUZANNE "SUZY" GLOWIAK HILTON	Democrat	54.6%
24	SETH LEWIS	Republican	51.9%
25	KARINA VILLA	Democrat	58.7%
26	DAN MCCONCHIE	Republican	50.2%
27	ANN GILLESPIE	Democrat	59.1%
28	LAURA M MURPHY	Democrat	58.1%
29	JULIE A MORRISON	Democrat	100.0%	one candidate
30	ADRIANE JOHNSON	Democrat	100.0%	one candidate
31	MARY EDLY-ALLEN	Democrat	56.8%
32	CRAIG WILCOX	Republican	55.9%
33	DONALD P DEWITTE	Republican	100.0%	one candidate
34	STEVE STADELMAN	Democrat	58.6%
35	DAVE SYVERSON	Republican	100.0%	one candidate
36	MICHAEL W HALPIN	Democrat	54.6%
37	WIN STOLLER	Republican	100.0%	one candidate
38	SUE REZIN	Republican	100.0%	one candidate
39	DON HARMON	Democrat	100.0%	one candidate
40	PATRICK J JOYCE	Democrat	55.3%
41	JOHN CURRAN	Republican	100.0%	one candidate
42	LINDA HOLMES	Democrat	60.2%
43	RACHEL VENTURA	Democrat	56.0%
44	SALLY J TURNER	Republican	100.0%	one candidate
45	ANDREW S CHESNEY	Republican	66.4%
46	DAVE KOEHLER	Democrat	58.1%
47	NEIL ANDERSON	Republican	100.0%	one candidate
48	DORIS TURNER	Democrat	50.9%
49	Not shown: district codes are fragments of one contest
50	JIL TRACY	Republican	100.0%
51	CHAPIN ROSE	Republican	100.0%	one candidate
52	SCOTT M BENNETT	Democrat	100.0%	one candidate
53	JASON BARICKMAN	Republican	100.0%	one candidate
54	STEVE MCCLURE	Republican	100.0%	one candidate
55	JASON PLUMMER	Republican	100.0%
56	ERICA CONWAY HARRISS	Republican	51.1%
57	CHRISTOPHER BELT	Democrat	57.6%
58	TERRI BRYANT	Republican	100.0%	one candidate
59	DALE FOWLER	Republican	100.0%	one candidate

2020: 22 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
1	ANTONIO "TONY" MUNOZ	Democrat	100.0%	one candidate
4	KIMBERLY A LIGHTFORD	Democrat	100.0%	one candidate
6 (special)	SARA FEIGENHOLTZ	Democrat	100.0%	one candidate
7	HEATHER A STEANS	Democrat	100.0%	one candidate
10	ROBERT MARTWICK	Democrat	53.8%
11 (special)	CELINA VILLANUEVA	Democrat	79.3%
13	ROBERT PETERS	Democrat	100.0%	one candidate
16	JACQUELINE "JACQUI" COLLINS	Democrat	100.0%	one candidate
19	MICHAEL E HASTINGS	Democrat	100.0%	one candidate
22	CRISTINA CASTRO	Democrat	100.0%	one candidate
25	KARINA VILLA	Democrat	51.0%
28	LAURA MURPHY	Democrat	100.0%	one candidate
31	MELINDA BUSH	Democrat	58.5%
34	STEVE STADELMAN	Democrat	61.7%
37	WIN STOLLER	Republican	99.6%
40	PATRICK J JOYCE	Democrat	58.5%
43	JOHN CONNOR	Democrat	64.5%
46	DAVE KOEHLER	Democrat	53.9%
49	MEG LOUGHRAN CAPPEL	Democrat	56.2%
52	SCOTT BENNETT	Democrat	63.4%
55	DARREN BAILEY	Republican	76.7%
58	TERRI BRYANT	Republican	100.0%	one candidate

2018: 39 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
2	OMAR AQUINO	Democrat	100.0%	one candidate
3	MATTIE HUNTER	Democrat	100.0%	one candidate
5	PATRICIA VAN PELT	Democrat	100.0%	one candidate
6	JOHN J CULLERTON	Democrat	100.0%	one candidate
8	RAM VILLIVALAM	Democrat	100.0%	one candidate
9	LAURA FINE	Democrat	71.8%
11	MARTIN A SANDOVAL	Democrat	100.0%	one candidate
12	STEVEN LANDEK	Democrat	100.0%	one candidate
14	EMIL JONES III	Democrat	100.0%	one candidate
15	NAPOLEON B HARRIS III	Democrat	100.0%	one candidate
17	ELGIE R SIMS JR	Democrat	99.6%
18	BILL CUNNINGHAM	Democrat	100.0%	one candidate
20	IRIS Y MARTINEZ	Democrat	100.0%	one candidate
21	LAURA ELLMAN	Democrat	50.6%
23	THOMAS CULLERTON	Democrat	54.9%
24	SUZANNE "SUZY" GLOWIAK	Democrat	50.8%
26	DAN MCCONCHIE	Republican	54.7%
27	ANN GILLESPIE	Democrat	52.0%
29	JULIE A MORRISON	Democrat	63.2%
30	TERRY LINK	Democrat	68.0%
32	CRAIG WILCOX	Republican	54.7%
33	DONALD P DEWITTE	Republican	50.6%
35	DAVE SYVERSON	Republican	100.0%	one candidate
36	NEIL ANDERSON	Republican	50.8%
38	SUE REZIN	Republican	59.4%
39	DON HARMON	Democrat	100.0%	one candidate
41	JOHN CURRAN	Republican	50.8%
42	LINDA HOLMES	Democrat	100.0%	one candidate
44	BILL BRADY	Republican	100.0%	one candidate
45	BRIAN W STEWART	Republican	62.6%
47	JIL TRACY	Republican	98.3%
48	ANDY MANAR	Democrat	56.8%
50	STEVE MCCLURE	Republican	100.0%	one candidate
51	CHAPIN ROSE	Republican	100.0%	one candidate
53	JASON BARICKMAN	Republican	100.0%	one candidate
54	JASON PLUMMER	Republican	70.0%
56	RACHELLE AUD CROWE	Democrat	58.4%
57	CHRISTOPHER BELT	Democrat	59.2%
59	DALE FOWLER	Republican	61.1%

2016: 40 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
1	ANTONIO ""TONY"" MUNOZ	not in source	100.0%	seats not in source; one candidate
2	OMAR AQUINO	not in source	100.0%	seats not in source; one candidate
4	KIMBERLY A. LIGHTFORD	not in source	100.0%	seats not in source; one candidate
5	PATRICIA VAN PELT	not in source	100.0%	seats not in source; one candidate
7	HEATHER A. STEANS	not in source	100.0%	seats not in source; one candidate
8	IRA I. SILVERSTEIN	not in source	100.0%	seats not in source; one candidate
10	JOHN G. MULROE	not in source	96.8%	seats not in source
11	MARTIN A. SANDOVAL	not in source	100.0%	seats not in source; one candidate
13	KWAME RAOUL	not in source	100.0%	seats not in source; one candidate
14	EMIL JONES III	not in source	100.0%	seats not in source; one candidate
16	JACQUELINE ""JACQUI"" COLLINS	not in source	100.0%	seats not in source; one candidate
17	DONNE E. TROTTER	not in source	100.0%	seats not in source; one candidate
19	MICHAEL E. HASTINGS	not in source	100.0%	seats not in source; one candidate
20	IRIS Y. MARTINEZ	not in source	100.0%	seats not in source; one candidate
22	CRISTINA CASTRO	not in source	64.4%	seats not in source
23	THOMAS E. CULLERTON	not in source	50.7%	seats not in source
25	JIM OBERWEIS	not in source	54.7%	seats not in source
26	DAN McCONCHIE	not in source	59.2%	seats not in source
28	LAURA MURPHY	not in source	53.5%	seats not in source
29	JULIE A. MORRISON	not in source	59.1%	seats not in source
31	MELINDA BUSH	not in source	54.1%	seats not in source
32	PAMELA ALTHOFF	not in source	67.6%	seats not in source
34	STEVE STADELMAN	not in source	100.0%	seats not in source; one candidate
35	DAVE SYVERSON	not in source	100.0%	seats not in source; one candidate
37	CHUCK WEAVER	not in source	100.0%	seats not in source; one candidate
38	SUE REZIN	not in source	57.9%	seats not in source
40	TOI W. HUTCHINSON	not in source	100.0%	seats not in source; one candidate
41	CHRISTINE RADOGNO	not in source	100.0%	seats not in source; one candidate
43	PAT McGUIRE	not in source	100.0%	seats not in source; one candidate
44	BILL BRADY	not in source	100.0%	seats not in source; one candidate
46	DAVE KOEHLER	not in source	100.0%	seats not in source; one candidate
47	JIL TRACY	not in source	99.0%	seats not in source
49	JENNIFER BERTINO-TARRANT	not in source	52.7%	seats not in source
50	WILLIAM ""SAM"" McCANN	not in source	100.0%	seats not in source; one candidate
52	SCOTT M. BENNETT	not in source	61.0%	seats not in source
53	JASON BARICKMAN	not in source	100.0%	seats not in source; one candidate
55	DALE A. RIGHTER	not in source	100.0%	seats not in source; one candidate
56	WILLIAM ""BILL"" HAINE	not in source	100.0%	seats not in source; one candidate
58	PAUL SCHIMPF	not in source	60.6%	seats not in source
59	DALE FOWLER	not in source	55.1%	seats not in source

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.