Idaho State Senate elections

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State Legislatures State legislative elections, 2025 Poll opening and closing times

This page displays election information for the Idaho State Senate.

Elections

Idaho state senators serve two-year terms, with all seats up for election every two years. Idaho holds elections for its legislature in even years.

2026

See also: Idaho State Senate elections, 2026

Elections for the Idaho State Senate will take place in 2026. The general election is on November 3, 2026.

2024

See also: Idaho State Senate elections, 2024

Elections for the Idaho State Senate took place in 2024. The general election was on November 5, 2024. The primary was May 21, 2024. The filing deadline was March 15, 2024.

In the 2024 elections, the Republicans in the Idaho State Senate increased their majority to 29-6.

Idaho State Senate
Party		As of November 5, 2024	After November 6, 2024
	Democratic Party	7	6
	Republican Party	28	29
Total		35	35

2022

See also: Idaho State Senate elections, 2022

Elections for the Idaho State Senate took place in 2022. The general election was on November 8, 2022. A primary was scheduled for May 17, 2022. The filing deadline was March 11, 2022.

In the 2022 elections, the Republicans in the Idaho State Senate retained their 28-7 majority.

Idaho State Senate
Party		As of November 8, 2022	After November 9, 2022
	Democratic Party	7	7
	Republican Party	28	28
Total		35	35

2020

See also: Idaho State Senate elections, 2020

Elections for the office of Idaho State Senate took place in 2020. The general election was held on November 3, 2020. A primary was scheduled for June 2, 2020. The filing deadline was March 13, 2020.

On March 30, 2020, Governor Brad Little (R) and Secretary of State Lawerence Denney (R) announced that Idaho's primary election would be conducted by mail. On March 24, 2020, the secretary of state announced the implementation of online absentee ballot application process, which can be accessed here. The primary date effectively changed from May 19, 2020, to June 2, 2020—the day on which ballots were due.

In the 2020 elections, the Republicans in the Idaho State Senate retained their 28-7 majority.

Idaho State Senate
Party		As of November 3, 2020	After November 4, 2020
	Democratic Party	7	7
	Republican Party	28	28
Total		35	35

2018

See also: Idaho State Senate elections, 2018

Elections for the Idaho State Senate took place in 2018. A semi-closed primary election took place on May 15, 2018. The general election was held on November 6, 2018. The candidate filing deadline was March 9, 2018.

In the 2018 elections, the Republican majority in the Idaho State Senate was reduced from 29-6 to 28-7.

Idaho State Senate
Party		As of November 6, 2018	After November 7, 2018
	Democratic Party	6	7
	Republican Party	29	28
Total		35	35

2016

See also: Idaho State Senate elections, 2016

Elections for the Idaho State Senate were held in 2016. The primary election took place on May 17, 2016, and the general election was held on November 8, 2016. The candidate filing deadline was March 11, 2016. All 35 seats in the Idaho State Senate were up for election in 2016.

Heading into the election, Republicans held a 28-7 majority. Republicans gained one seat in the election, giving them a 29-6 majority.

Idaho State Senate
Party		As of November 7, 2016	After November 8, 2016
	Democratic Party	7	6
	Republican Party	28	29
Total		35	35

Click [show] to see election information dating back to 2000

2014 See also: Idaho State Senate elections, 2014 Elections for the Idaho State Senate took place in 2014. A primary election took place on May 20, 2014. The general election was held on November 4, 2014. The signature filing deadline for candidates wishing to run in this election was March 14, 2014. All 35 Senate seats were up for election in 2014. Heading into the election, Republicans held a 28-7 majority. No partisan change occurred in the election. Idaho State Senate Party As of November 3, 2014 After November 4, 2014      Democratic Party 7 7      Republican Party 28 28 Total 35 35 2012 See also: Idaho State Senate elections, 2012 Elections for the office of Idaho State Senate took place in 2012. The primary election was held on May 15, 2012, and the general election was held on November 6, 2012. The candidate filing deadline was March 9, 2012. All 35 Senate seats were up for election in 2012. Heading into the election, Republicans held a 28-7 majority. Republicans gained one seat in the election, giving them a 29-6 majority. Idaho State Senate Party As of November 5, 2012 After the 2012 Election      Democratic Party 7 6      Republican Party 28 29 Total 35 35 The table below details the 10 districts with the smallest margin of victory in the November 6 general election in 2012. 2012 Margin of Victory, Idaho State Senate District Winner Margin of Victory Total Votes Top Opponent Idaho State Senate, District 5, General Election Dan Schmidt 2% 20,276 Warren A. Ducote Jr. Idaho State Senate, District 15, General Election Fred S. Martin 4.2% 18,328 Betty Richardson Idaho State Senate, District 18, General Election Branden J. Durst 7.1% 21,088 Mitch Toryanski Idaho State Senate, District 29, General Election Roy Lacey 7.7% 17,636 Greg Romriell Idaho State Senate, District 6, General Election Dan Johnson 10.7% 18,365 John Bradbury Idaho State Senate, District 16, General Election Les Bock 14.5% 19,032 Joan Cloonan Idaho State Senate, District 4, General Election John Goedde 21.6% 18,383 Warren A. Ducote Jr. Idaho State Senate, District 10, General Election Jim Rice 22.4% 12,591 Leif Skyving Idaho State Senate, District 17, General Election Elliot Werk 25.9% 16,130 Judy M. Peavey-Derr Idaho State Senate, District 7, General Election Sheryl L. Nuxoll 28% 18,105 Jon Cantamessa 2010 See also: Idaho State Senate elections, 2010 Elections for the office of Idaho State Senate took place in 2010. The primary election was held on May 25, 2010, and the general election was held on November 2, 2010. The candidate filing deadline was March 19, 2010. All 35 Senate seats were up for election in 2010. Heading into the election, Republicans held a 28-7 majority. No partisan change occurred in the election. Idaho State Senate Party As of November 1, 2010 After the 2010 Election      Democratic Party 7 7      Republican Party 28 28 Total 35 35 In 2010, the total amount of contributions raised in state Senate elections was $1,380,073. The top 10 contributors were: 2010 Donors, Idaho State Senate Donor Amount Senate Republican PAC of Idaho $27,250 Idaho Farm Bureau $25,550 Idaho Association of Realtors $25,500 Idaho Power Co $25,000 Qwest Communications $23,500 JR Simplot Co $22,100 Donoval, James $21,689 Coeur D Alene Tribe $20,750 Idaho Education Association $19,000 Idaho Telecom Alliance $18,250 2008 See also: Idaho State Senate elections, 2008 Elections for the office of Idaho State Senate consisted of a primary election on May 27, 2008, and a general election on November 4, 2008. All 35 Senate seats were up for election in 2008. During the 2008 election, the total value of contributions to Senate candidates was $1,661,840. The top 10 contributors were: 2008 Donors, Idaho State Senate Donor Amount Idaho Republican Party $32,500 Idaho Power Co $31,750 Sorensen, Dean E $31,279 Idaho Association of Realtors $24,250 Troupis, Christ T $22,682 Idaho Farm Bureau $22,675 Qwest Communications $22,100 Senate Republican PAC of Idaho $21,000 Jr Simplot Co $20,300 Mckague, Shirley $20,000 2006 See also: Idaho State Senate elections, 2006 Elections for the office of Idaho State Senate consisted of a primary election on May 23, 2006, and a general election on November 7, 2006. All 35 Senate seats were up for election in 2006. During the 2006 election, the total value of contributions to Senate candidates was $1,199,736. The top 10 contributors were: 2006 Donors, Idaho State Senate Donor Amount Idaho Power Co $35,000 Idaho Education Association $22,500 Micron Technology $20,700 Senate Republican PAC of Idaho $19,500 Idaho Association of Realtors $18,750 Fulcher, Russell M $18,500 Idaho Farm Bureau $16,800 Idaho Associated General Contractors $15,125 Qwest Communications $14,450 Union Pacific Railroad $12,350 2004 See also: Idaho State Senate elections, 2004 Elections for the office of Idaho State Senate consisted of a primary election on May 25, 2004, and a general election on November 2, 2004. All 35 Senate seats were up for election in 2004. During the 2004 election, the total value of contributions to Senate candidates was $1,315,599. The top 10 contributors were: 2004 Donors, Idaho State Senate Donor Amount Idaho Education Association $28,900 Hansen, Randy $21,000 Union Pacific Railroad $20,400 Idaho Association of Realtors $20,400 Werk, Elliot $17,600 Micron Technology $16,500 Idaho Power Co $15,650 Jorgenson, Michael (Mike) $15,304 Senate Republicans of Idaho $15,050 Qwest Communications $14,925 2002 See also: Idaho State Senate elections, 2002 Elections for the office of Idaho State Senate consisted of a primary election on May 28, 2002, and a general election on November 5, 2002. All 35 Senate seats were up for election in 2002. During the 2002 election, the total value of contributions to Senate candidates was $1,287,803. The top 10 contributors were: 2002 Donors, Idaho State Senate Donor Amount Idaho Education Association $35,000 United for Idaho/Idaho Business PAC $32,100 Idaho Association of Realtors $26,800 Senate Republicans of Idaho $26,100 Pasley-Stuart, Anne $19,500 Holland, Dave $16,234 Idaho Power Co $13,700 Micron Technology $12,900 Citizens for Federal Term Limits Cmte to Repeal The Repeal $12,750 Jr Simplot Co $12,750 2000 See also: Idaho State Senate elections, 2000 Elections for the office of Idaho State Senate consisted of a primary election on May 23, 2000, and a general election on November 7, 2000. All 35 Senate seats were up for election in 2000. During the 2000 election, the total value of contributions to Senate candidates was $628,054. The top 10 contributors were: 2000 Donors, Idaho State Senate Donor Amount Idaho Education Association $13,900 Jr Simplot Co $13,505 Senate Republicans of Idaho $12,500 Lodge, Patti Ann $12,500 Idaho Association of Realtors $12,050 Senate Republican $11,500 Idaho Associated General Contractors $10,650 Idaho Trucking Association $9,950 Boise Cascade Corp $9,900 Idaho Medical Association $9,750

Historical party control

Republicans won control of the Idaho State Senate in 1992. In 2024, they won a 29-6 majority.

The table below shows the partisan history of the Idaho Senate following every general election from 1992 to 2024. All data from 2006 or earlier comes from Michael Dubin's Party Affiliations in the State Legislatures (McFarland Press, 2007). Data after 2006 was compiled by Ballotpedia staff.

Idaho State Senate election results: 1992-2024

Year	'92	'94	'96	'98	'00	'02	'04	'06	'08	'10	'12	'14	'16	'18	'20	'22	'24
Democrats	12	8	5	4	3	7	7	7	7	7	6	7	6	7	7	7	6
Republicans	23	27	30	31	32	28	28	28	28	28	29	28	29	28	28	28	29

Trifecta history

A state government trifecta is a term that describes single-party government, when one political party holds the governor's office and has majorities in both chambers of the legislature in a state government. Between 1992 and 2023, Idaho was under the following types of trifecta control:

• Democratic trifecta: None
• Republican trifecta: 1995-2023
• Divided government: 1992-1994

Idaho Party Control: 1992-2025
No Democratic trifectas  •  Thirty one years of Republican trifectas
Scroll left and right on the table below to view more years.

Year	92	93	94	95	96	97	98	99	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25
Governor	D	D	D	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
Senate	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R
House	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R

Footnotes

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