Oregon 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 Oregon State Senate.

Elections

Oregon state senators serve staggered, four-year terms and half of the Senate is up for election every two years. Oregon holds elections for its legislature in even years.

2026

See also: Oregon State Senate elections, 2026

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

2024

See also: Oregon State Senate elections, 2024

Elections for the Oregon 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 12, 2024.

Before the 2024 election, Democrats held a 17-12-1 majority and they increased their majority to 18-12 after the election.

Oregon State Senate
Party		As of November 5, 2024	After November 6, 2024
	Democratic Party	17	18
	Republican Party	12	12
	Independent Party of Oregon	1	0
Total		30	30

2022

See also: Oregon State Senate elections, 2022

Elections for the Oregon 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 8, 2022.

Heading into the 2022 election, Democrats held an 18-11-1 majority. Following the election, Republicans gained one net seat, giving the Democrats a 17-12-1 majority. On January 1, 2023, before the new Oregon Senate was sworn in, State Senator Dallas Heard (R) resigned, giving the chamber one vacancy.

Oregon State Senate
Party		As of November 8, 2022	After November 9, 2022
	Democratic Party	18	17
	Republican Party	11	12
	Independent	1	1
Total		30	30

2020

See also: Oregon State Senate elections, 2020

Elections for the office of Oregon State Senate took place in 2020. The general election was held on November 3, 2020. A primary was scheduled for May 19, 2020. The filing deadline was March 10, 2020.

Heading into the election, Democrats held an 18-12 majority. Democrats maintained their 18-12 majority in the election.

Oregon State Senate
Party		As of November 3, 2020	After November 4, 2020
	Democratic Party	18	18
	Republican Party	12	12
Total		30	30

2018

See also: Oregon State Senate elections, 2018

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

In the 2018 elections, Democrats increased their majority in the Oregon State Senate from 17-13 to 18-12.

Oregon State Senate
Party		As of November 6, 2018	After November 7, 2018
	Democratic Party	17	18
	Republican Party	13	12
Total		30	30

2016

See also: Oregon State Senate elections, 2016

Elections for the Oregon State Senate took place 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 8, 2016. A total of 16 seats out of the 30 seats in the Oregon State Senate were up for election in 2016.

Heading into the election, Democrats held an 18-12 majority. Democrats lost one seat in the election, giving them a 17-13 majority.

Oregon State Senate
Party		As of November 7, 2016	After November 8, 2016
	Democratic Party	18	17
	Republican Party	12	13
Total		30	30

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

2014 See also: Oregon State Senate elections, 2014 Elections for the Oregon 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 11, 2014. Heading into the election, Democrats held a 16-14 majority. Democrats gained two seats in the election, giving them an 18-12 majority. Oregon State Senate Party As of November 3, 2014 After November 4, 2014      Democratic Party 16 18      Republican Party 14 12 Total 30 30 2012 See also: Oregon State Senate elections, 2012 Elections for the office of Oregon 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 6, 2012. A total of 15 seats were up for election. Heading into the election, Democrats held a 16-14 majority. No partisan change occurred in the election. Oregon State Senate Party As of November 5, 2012 After the 2012 Election      Democratic Party 16 16      Republican Party 14 14 Total 30 30 During the 2012 election, the total value of contributions to the 37 Senate candidates was $7,962,888. The top 10 contributors were: 2012 Donors, Oklahoma State Senate Donor Amount The Leadership Fund $959,638 Senate Democratic Leadership Fund $393,062 Oregon Democratic Party $314,886 Oregon Health Care Association $238,484 Doctors for Healthy Communities $174,225 Douglas County Physicians Association $164,975 Service Employees Local 530 $160,763 Coalition for a Healthy Oregon $128,841 Oregon Small Business Association $108,533 Nike $102,740 The following table details the 10 districts with the smallest margin of victory in the November 6 general election. 2012 Margin of Victory, Oregon State Senate District Winner Margin of Victory Total Votes Top Opponent District 25 Laurie Monnes Anderson 9.3% 42,952 Scott Hansen District 5 Arnie Roblan 9.7% 55,322 Scott Roberts District 27 Tim Knopp 18.4% 59,797 Geri Hauser District 12 Brian Boquist 20.3% 56,573 Annette Frank District 14 Mark Hass 23.7% 53,530 Gary Coe District 9 Fred Girod 28.7% 51,729 Steve Frank District 2 Herman Baertschiger, Jr. 30.8% 52,639 Jim Diefenderfer District 17 Elizabeth Steiner Hayward 33.1% 56,424 John Verbeek District 29 Bill Hansell 37.2% 44,527 Antone Minthorn District 18 Ginny Burdick 39% 62,449 Suzanne Gallagher 2010 See also: Oregon State Senate elections, 2010 Elections for the office of Oregon State Senate took place in 2010. The primary election was held on May 18, 2010, and the general election was held on November 2, 2010. The candidate filing deadline was March 9, 2010. A total of 16 seats were up for election. Heading into the election, Democrats held an 18-12 majority. Democrats lost two seats in the election, giving them a 16-14 majority. Oregon State Senate Party As of November 1, 2010 After the 2010 Election      Democratic Party 18 16      Republican Party 12 14 Total 30 30 During the 2010 election, the total value of contributions to the 41 Senate candidates was $9,803,929. The top 10 contributors were: 2010 Donors, Oregon State Senate Donor Amount Oregon Senate Republican Leadership Fund $1,070,878 Oregon Democratic Party $933,967 Senate Democratic Leadership Fund $723,942 Oregon Education Association $250,846 Oregon Public Employees Local 503 $241,151 Oregon Health Care Association $192,361 Oregon Trial Lawyers Association $181,900 Doctors for Healthy Communities $110,995 Coalition for a Healthy Oregon $102,830 Douglas County Physicians $92,000 2008 See also: Oregon State Senate elections, 2008 Elections for the office of Oregon State Senate consisted of a primary election date on May 20, 2008, and a general election on November 4, 2008. A total of 16 seats were up for election. During the 2008 election, the total contributions to Senate candidates amounted to $3,018,794. The top 10 contributors were: 2008 Donors, Oregon State Senate Donor Amount Senate Democratic Leadership Fund Of Oregon $251,711 Oregon Senate Republican Leadership Fund $171,042 Northwest Grocery Association $55,000 Oregon Restaurant & Lodging Association $53,572 Oregon Soft Drink Association $51,500 Oregon Education Association $49,522 Oregon Health Care Association / Oregon Center for Assisted Living $48,700 Oregon Association of Realtors $46,764 Oregon Beer & Wine Distributors Association $43,307 Ted Ferrioli Campaign Cmte $42,124 2006 See also: Oregon State Senate elections, 2006 Elections for the office of Oregon State Senate consisted of a primary election date on May 16, 2006, and a general election on November 7, 2006. A total of 15 seats were up for election. During the 2006 election, the total value of contributions to the 40 Senate candidates was $7,587,074. The top 10 contributors were: 2006 Donors, Oregon State Senate Donor Amount Senate Republican Leadership Fund $634,103 Senate Democratic Leadership Fund $511,391 Oregon Education Association $282,649 Friends of Ted Ferrioli $204,850 Service Employees Local 503 $156,085 Oregon Beer & Wine Distributors Association $122,607 Oregon Health Care Association $122,500 Oregon Forest Industries Council $110,000 Westlund II, Bernard J (Ben) $104,153 Monroe, Billie $93,600 2004 See also: Oregon State Senate elections, 2004 Elections for the office of Oregon State Senate consisted of a primary election date on May 18, 2004, and a general election on November 2, 2004. A total of 17 seats were up for election. During the 2004 election, the total value of contributions to the 36 Senate candidates was $7,490,951. The top 10 contributors were: 2004 Donors, Oregon State Senate Donor Amount Senate Democratic Leadership Fund $1,056,249 Senate Republican Leadership Fund $623,155 Oregon Education Association $314,612 Oregon Victory Cmte $180,000 Service Employees Local 503 $141,119 Roger Beyer for Senate $135,500 Oregon Health Care Association $130,446 Oregon Beer & Wine Distributors Association $129,901 Northwest Grocery Association $116,844 Oregon Restaurant Association $103,063 2002 See also: Oregon State Senate elections, 2002 Elections for the office of Oregon State Senate consisted of a primary election date on May 21, 2002, and a general election on November 5, 2002. A total of 15 seats were up for election. During the 2002 election, the total value of contributions to the 37 Senate candidates was $6,330,449. The top 10 contributors were: 2002 Donors, Oregon State Senate Donor Amount Senate Democratic Leadership Fund of Oregon $496,913 Senate Republican Leadership Fund of Oregon $412,569 Oregon Education Association $347,166 Oregon Trial Lawyers Association $168,925 Service Employees Local 503 $144,409 Oregon Restaurant Association $121,692 Oregon Forest Industries Council $111,000 Democratic Congressional Campaign Cmte $110,250 Associated Oregon Industries $104,000 Oregon Victory Cmte $92,250 2000 See also: Oregon State Senate elections, 2000 Elections for the office of Oregon State Senate consisted of a primary election date on May 16, 2000, and a general election on November 7, 2000. A total of 15 seats were up for election. During the 2000 election, the total value of contributions to the 30 Senate candidates was $5,255,383. The top 10 contributors were: 2000 Donors, Oregon State Senate Donor Amount Senate Democratic Leadership Fund of Oregon $602,496 Senate Republican Leadership Fund of Oregon $414,678 Friends Of Gene Derfler $257,246 Oregon Education Association $256,098 Oregon Forest Industries Council $139,350 Oregon Victory Cmte $120,000 Associated Oregon Industries $100,660 Service Employees Local 503 $100,242 21St Century Fund $90,000 Fahey, Pat $67,500

Historical party control

Democrats won control of the Oregon State Senate in 2004. In 2024, they won a 18-12 majority.

The table below shows the partisan history of the Oregon 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.

Oregon 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	16	11	10	12	14	15	18	17	18	16	16	18	17	18	18	17	18
Republicans	14	19	20	18	16	15	12	11	12	14	14	12	13	12	12	12	12
Other	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	0

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, Oregon was under the following types of trifecta control:

• Democratic trifecta: 2007-2010, 2013-2023
• Republican trifecta: None
• Divided government: 1992-2006, 2011-2012

Oregon Party Control: 1992-2025
Seventeen years of Democratic trifectas  •  No 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
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Senate	D	D	D	R	R	R	R	R	R	R	R	S	S	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D	D
House	R	R	R	R	R	R	R	R	R	R	R	R	R	R	R	D	D	D	D	S	S	D	D	D	D	D	D	D	D	D	D	D	D	D

Footnotes

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