Idaho Senate: Party Control and History

Current seats

Republican majorityDemocrats 6, Republicans 29. 35 seats; 18 for a majority.

Democrats 6Republicans 29

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.

Idaho overviewIdaho House

District map

Democrat 6Republican 29

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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 (35 to 42 seats).

Seats by election, table

Year	D	R	Seats	Control
2022	7	28	35	Republican majority
2020	7	28	35	Republican majority
2018	7	28	35	Republican majority
2016	6	29	35	Republican majority
2014	7	28	35	Republican majority
2012	7	28	35	Republican majority
2010	7	28	35	Republican majority
2008	7	28	35	Republican majority
2006	7	28	35	Republican majority
2004	7	28	35	Republican majority
2002	7	28	35	Republican majority
2000	3	32	35	Republican majority
1998	4	31	35	Republican majority
1996	5	30	35	Republican majority
1994	8	27	35	Republican majority
1992	12	23	35	Republican majority
1990	21	21	42	Tied
1988	19	23	42	Republican majority
1986	16	26	42	Republican majority
1984	14	28	42	Republican majority
1982	14	21	35	Republican majority
1980	12	23	35	Republican majority
1978	16	19	35	Republican majority
1976	15	20	35	Republican majority
1974	14	21	35	Republican majority
1972	12	23	35	Republican majority
1970	16	19	35	Republican majority
1968	16	19	35	Republican majority

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: 35 contests

District	Most votes	Party	Share	Note
1	JIM WOODWARD	Republican	76.3%
2	PHIL HART	Republican	80.3%
3	DOUG "DOUG O" OKUNIEWICZ	Republican	80.6%
4	BEN TOEWS	Republican	66.3%
5	CARL BJERKE	Republican	79.4%
6	DAN FOREMAN	Republican	53.3%
7	CINDY CARLSON	Republican	75.3%
8	CHRISTY ZITO	Republican	72.1%
9	BRANDON SHIPPY	Republican	82.9%
10	TAMMY NICHOLS	Republican	80.7%
11	CAMILLE BLAYLOCK	Republican	65.9%
12	BEN ADAMS	Republican	100.0%	one candidate
13	BRIAN LENNEY	Republican	70.0%
14	C SCOTT GROW	Republican	84.9%
15	CODI GALLOWAY	Republican	51.8%
16	ALI RABE	Democrat	58.7%
17	CARRIE SEMMELROTH	Democrat	57.3%
18	JANIE WARD-ENGELKING	Democrat	62.6%
19	MELISSA WINTROW	Democrat	100.0%	one candidate
20	JOSH KEYSER	Republican	69.6%
21	TREG A BERNT	Republican	74.2%
22	LORI DEN HARTOG	Republican	66.7%
23	TODD LAKEY	Republican	77.8%
24	GLENNEDA ZUIDERVELD	Republican	78.8%
25	JOSH KOHL	Republican	100.0%	one candidate
26	RON TAYLOR	Democrat	45.6%
27	KELLY ANTHON	Republican	100.0%	one candidate
28	JIM GUTHRIE	Republican	78.5%
29	JAMES D RUCHTI	Democrat	100.0%	one candidate
30	JULIE VANORDEN	Republican	84.0%
31	VAN T BURTENSHAW	Republican	87.5%
32	KEVIN J COOK	Republican	100.0%	one candidate
33	DAVE LENT	Republican	100.0%	one candidate
34	DOUG RICKS	Republican	86.0%
35	MARK HARRIS	Republican	77.5%

2022: 35 contests

District	Most votes	Party	Share	Note
1	SCOTT HERNDON	Republican	59.1%
2	PHIL HART	Republican	100.0%	one candidate
3	DOUG "DOUG O" OKUNIEWICZ	Republican	100.0%	one candidate
4	BEN TOEWS	Republican	100.0%	one candidate
5	CARL BJERKE	Republican	100.0%	one candidate
6	DAN FOREMAN	Republican	50.1%
7	CINDY CARLSON	Republican	100.0%	one candidate
8	GEOFF SCHROEDER	Republican	100.0%	one candidate
9	ABBY LEE	Republican	100.0%	one candidate
10	TAMMY NICHOLS	Republican	77.2%
11	CHRIS TRAKEL	Republican	63.8%
12	BEN ADAMS	Republican	100.0%	one candidate
13	BRIAN LENNEY	Republican	100.0%	one candidate
14	C SCOTT GROW	Republican	81.2%
15	RICK JUST	Democrat	49.8%
16	ALI RABE	Democrat	59.5%
17	CARRIE SEMMELROTH	Democrat	59.8%
18	JANIE WARD-ENGELKING	Democrat	66.1%
19	MELISSA WINTROW	Democrat	68.2%
20	CHUCK WINDER	Republican	100.0%	one candidate
21	TREG A BERNT	Republican	83.1%
22	LORI DEN HARTOG	Republican	63.7%
23	TODD LAKEY	Republican	78.2%
24	GLENNEDA ZUIDERVELD	Republican	100.0%	one candidate
25	LINDA WRIGHT HARTGEN	Republican	75.2%
26	RON C TAYLOR	Democrat	51.6%
27	KELLY ANTHON	Republican	89.0%
28	JIM GUTHRIE	Republican	76.0%
29	JAMES D RUCHTI	Democrat	54.1%
30	JULIE VANORDEN	Republican	84.3%
31	VAN BURTENSHAW	Republican	100.0%	one candidate
32	KEVIN COOK	Republican	100.0%	one candidate
33	DAVE LENT	Republican	100.0%	one candidate
34	DOUG RICKS	Republican	100.0%	one candidate
35	MARK HARRIS	Republican	100.0%	one candidate

2020: 35 contests

District	Most votes	Party	Share	Note
1	JIM WOODWARD	Republican	77.4%
2	STEVE VICK	Republican	100.0%	one candidate
3	PETER RIGGS	Republican	100.0%	one candidate
4	MARY SOUZA	Republican	64.5%
5	DAVID NELSON	Democrat	50.4%
6	DAN JOHNSON	Republican	100.0%	one candidate
7	CARL G CRABTREE	Republican	100.0%	one candidate
8	STEVEN THAYN	Republican	73.9%
9	ABBY LEE	Republican	100.0%	one candidate
10	JIM RICE	Republican	64.8%
11	PATTI ANNE LODGE	Republican	100.0%	one candidate
12	TODD LAKEY	Republican	69.9%
13	JEFF C AGENBROAD	Republican	70.7%
14	C SCOTT GROW	Republican	73.0%
15	FRED S MARTIN	Republican	53.0%
16	GRANT BURGOYNE	Democrat	62.3%
17	ALI RABE HERRIN III	Democrat	61.8%
18	JANIE WARD-ENGELKING	Democrat	61.9%
19	MELISSA WINTROW	Democrat	68.6%
20	CHUCK WINDER	Republican	100.0%	one candidate
21	REGINA BAYER	Republican	63.9%
22	LORI DEN HARTOG	Republican	74.2%
23	CHRISTY ZITO	Republican	76.3%
24	LEE HEIDER	Republican	71.0%
25	JIM PATRICK	Republican	100.0%	one candidate
26	MICHELLE STENNETT	Democrat	56.4%
27	KELLY ARTHUR ANTHON	Republican	100.0%	one candidate
28	JIM GUTHRIE	Republican	77.6%
29	MARK NYE	Democrat	100.0%	one candidate
30	KEVIN COOK	Republican	100.0%	one candidate
31	R STEVEN BAIR	Republican	100.0%	one candidate
32	MARK HARRIS	Republican	100.0%	one candidate
33	DAVE LENT	Republican	100.0%	one candidate
34	DOUG RICKS	Republican	100.0%	one candidate
35	VAN BURTENSHAW	Republican	100.0%	one candidate

2018: 35 contests

District	Most votes	Party	Share	Note
1	JIM WOODWARD	Republican	74.3%
2	STEVE VICK	Republican	72.9%
3	DON CHEATHAM	Republican	72.2%
4	MARY SOUZA	Republican	57.7%
5	DAVID NELSON	Democrat	56.1%
6	DANIEL JOHNSON	Republican	100.0%	one candidate
7	CARL G CRABTREE	Republican	100.0%	one candidate
8	STEVEN P THAYN	Republican	71.0%
9	ABBY LEE	Republican	100.0%	one candidate
10	JIM RICE	Republican	61.5%
11	PATTI ANNE LODGE	Republican	77.8%
12	TODD LAKEY	Republican	65.1%
13	JEFF C AGENBROAD	Republican	100.0%	one candidate
14	C SCOTT GROW	Republican	69.6%
15	FRED S MARTIN	Republican	50.0%
16	GRANT BURGOYNE	Democrat	65.2%
17	MARYANNE JORDAN	Democrat	69.7%
18	JANIE WARD-ENGELKING	Democrat	100.0%	one candidate
19	CHERIE BUCKNER-WEBB	Democrat	74.6%
20	CHUCK WINDER	Republican	100.0%	one candidate
21	CLIFFORD R "CLIFF" BAYER	Republican	57.8%
22	LORI DENHARTOG	Republican	69.4%
23	BERT BRACKETT	Republican	100.0%	one candidate
24	LEE HEIDER	Republican	99.4%
25	JIM PATRICK	Republican	100.0%	one candidate
26	MICHELLE STENNETT	Democrat	59.9%
27	KELLY ARTHUR ANTHON	Republican	100.0%	one candidate
28	JIM GUTHRIE	Republican	61.9%
29	MARK NYE	Democrat	57.9%
30	DEAN M MORTIMER	Republican	100.0%	one candidate
31	STEVE BAIR	Republican	100.0%	one candidate
32	MARK HARRIS	Republican	100.0%	one candidate
33	DAVE LENT	Republican	59.5%
34	BRENT HILL	Republican	83.6%
35	VAN BURTENSHAW	Republican	100.0%	one candidate

2016: 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	Shawn A. Keough	not in source	76.3%	seats not in source
2	Steve Vick	not in source	100.0%	seats not in source; one candidate
3	Bob Nonini	not in source	100.0%	seats not in source; one candidate
4	Mary Souza	not in source	62.9%	seats not in source
7	Carl G Crabtree	not in source	73.8%	seats not in source
8	Steven P. Thayn	not in source	75.5%	seats not in source
9	Abby Lee	not in source	79.8%	seats not in source
11	Patti Anne Lodge	not in source	72.6%	seats not in source
13	Jeff C. Agenbroad	not in source	71.1%	seats not in source
14	Marv Hagedorn	not in source	70.6%	seats not in source
15	Fred S. Martin	not in source	56.3%	seats not in source
16	Grant Burgoyne	not in source	57.0%	seats not in source
20	Chuck Winder	not in source	67.9%	seats not in source
22	Lori Den Hartog	not in source	100.0%	seats not in source; one candidate
23	Bert Brackett	not in source	100.0%	seats not in source; one candidate
24	Lee Heider	not in source	64.0%	seats not in source
25	Jim Patrick	not in source	72.3%	seats not in source
28	Jim Guthrie	not in source	61.6%	seats not in source
29	Mark Nye	not in source	48.1%	seats not in source
30	Dean M. Mortimer	not in source	100.0%	seats not in source; one candidate
31	R. Steven Bair	not in source	100.0%	seats not in source; one candidate
33	Bart M. Davis	not in source	88.3%	seats not in source
34	Brent Hill	not in source	100.0%	seats not in source; one candidate
35	Jeff C. Siddoway	not in source	100.0%	seats not in source; one candidate

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.