Colorado Senate: Party Control and History

Current seats

Democratic majorityDemocrats 23, Republicans 12. 35 seats; 18 for a majority.

Democrats 23Republicans 12

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.

Colorado overviewColorado House

District map

Democrat 23Republican 12

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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

Seats by election, table

Year	D	R	Other	Seats	Control
2022	22	13	0	35	Democratic majority
2020	20	15	0	35	Democratic majority
2018	19	16	0	35	Democratic majority
2016	17	18	0	35	Republican majority
2014	17	18	0	35	Republican majority
2012	20	15	0	35	Democratic majority
2010	20	15	0	35	Democratic majority
2008	21	14	0	35	Democratic majority
2006	20	15	0	35	Democratic majority
2004	18	17	0	35	Democratic majority
2002	17	18	0	35	Republican majority
2000	18	17	0	35	Democratic majority
1998	15	20	0	35	Republican majority
1996	15	20	0	35	Republican majority
1994	16	19	0	35	Republican majority
1992	16	19	0	35	Republican majority
1990	12	23	0	35	Republican majority
1988	11	24	0	35	Republican majority
1986	10	25	0	35	Republican majority
1984	11	24	0	35	Republican majority
1982	14	21	0	35	Republican majority
1980	13	22	0	35	Republican majority
1978	13	22	0	35	Republican majority
1976	17	18	0	35	Republican majority
1974	16	19	0	35	Republican majority
1972	13	22	0	35	Republican majority
1970	14	21	0	35	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: 18 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	LISA FRIZELL	Republican	60.7%
5	MARC CATLIN	Republican	52.2%
6	CLEAVE ALAN SIMPSON	Republican	55.9%
10	LARRY G LISTON	Republican	57.0%
12	MARC SNYDER	Democrat	48.9%
13	SCOTT BRIGHT	Republican	56.6%
14	CATHY KIPP	Democrat	68.2%
16	CHRIS KOLKER	Democrat	52.1%
17	SONYA JAQUEZ LEWIS	Democrat	66.8%
18	JUDY AMABILE	Democrat	90.5%
19	LINDSEY DAUGHERTY	Democrat	56.1%
21	DAFNA MICHAELSON JENET	Democrat	51.1%
23	BARB KIRKMEYER	Republican	97.8%
26	JEFF BRIDGES	Democrat	62.0%
28	MIKE WEISSMAN	Democrat	63.5%
29	JANET BUCKNER	Democrat	100.0%	one candidate
31	CHRIS HANSEN	Democrat	83.9%
33	JAMES COLEMAN	Democrat	81.8%

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	Note
1	BYRON PELTON	Republican	100.0%	one candidate
3	NICK HINRICHSEN	Democrat	51.2%
4	MARK BAISLEY	Republican	60.8%
7	JANICE RICH	Republican	70.1%
8	DYLAN ROBERTS	Democrat	55.7%
9	PAUL LUNDEEN	Republican	62.3%
11	TONY EXUM	Democrat	49.9%
15	JANICE MARCHMAN	Democrat	50.6%
20	LISA A CUTTER	Democrat	54.2%
22	JESSIE DANIELSON	Democrat	67.3%
24	KYLE MULLICA	Democrat	53.8%
25	FAITH WINTER	Democrat	61.5%
27	TOM SULLIVAN	Democrat	54.9%
30	KEVIN VAN WINKLE	Republican	53.8%
32	ROBERT RODRIGUEZ	Democrat	76.0%
34	JULIE C GONZALES	Democrat	100.0%	one candidate
35	ROD PELTON	Republican	74.3%

2020: 18 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
4	JIM SMALLWOOD	Republican	62.3%
8	BOB RANKIN	Republican	50.6%
10	LARRY G LISTON	Republican	56.4%
12	BOB GARDNER	Republican	58.4%
14	JOANN GINAL	Democrat	66.7%
17	SONYA JAQUEZ LEWIS	Democrat	67.9%
18	STEVE FENBERG	Democrat	82.9%
19	RACHEL ZENZINGER	Democrat	59.2%
21	DOMINICK MORENO	Democrat	63.5%
23	BARBARA KIRKMEYER	Republican	55.1%
25	KEVIN PRIOLA	Republican	50.8%
26	JEFF BRIDGES	Democrat	60.6%
27	CHRIS KOLKER	Democrat	55.3%
28	JANET BUCKNER	Democrat	61.9%
29	RHONDA FIELDS	Democrat	68.7%
31	CHRIS HANSEN	Democrat	76.7%
33	JAMES RASHAD COLEMAN	Democrat	91.0%
35	CLEAVE SIMPSON	Republican	60.1%

2018: 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	JERRY SONNENBERG	Republican	79.0%
2	DENNIS HISEY	Republican	65.3%
3	LEROY M GARCIA	Democrat	73.6%
5	KERRY DONOVAN	Democrat	60.5%
6	DON CORAM	Republican	54.7%
7	RAY SCOTT	Republican	63.6%
9	PAUL LUNDEEN	Republican	70.3%
11	PETE LEE	Democrat	62.0%
13	JOHN COOKE	Republican	58.7%
15	ROB WOODWARD	Republican	53.1%
16	TAMMY STORY	Democrat	55.7%
20	JESSIE DANIELSON	Democrat	54.1%
22	BRITTANY PETTERSEN	Democrat	58.2%
24	FAITH WINTER	Democrat	52.3%
30	CHRIS HOLBERT	Republican	52.8%
32	ROBERT RODRIGUEZ	Democrat	72.0%
34	JULIE GONZALES	Democrat	83.1%

2016: 18 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	Jim Smallwood	not in source	69.4%	seats not in source
8	Randy L. Baumgardner	not in source	54.9%	seats not in source
10	Owen Hill	not in source	66.2%	seats not in source
12	Bob Gardner	not in source	75.3%	seats not in source
14	John Kefalas	not in source	61.7%	seats not in source
17	Matt Jones	not in source	100.0%	seats not in source; one candidate
18	Stephen Fenberg	not in source	79.6%	seats not in source
19	Rachel Zenzinger	not in source	47.8%	seats not in source
21	Dominick Moreno	not in source	99.1%	seats not in source
23	Vicki Marble	not in source	58.0%	seats not in source
25	Kevin Priola	not in source	52.1%	seats not in source
26	Daniel Kagan	not in source	53.5%	seats not in source
27	Jack Tate	not in source	53.4%	seats not in source
28	Nancy Todd	not in source	55.7%	seats not in source
29	Rhonda Fields	not in source	54.2%	seats not in source
31	Lois Court	not in source	69.6%	seats not in source
33	Angela Williams	not in source	82.0%	seats not in source
35	Larry W. Crowder	not in source	59.9%	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.