Missouri State Senate elections
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This page displays election information for the Missouri State Senate.
Elections
Missouri state senators serve staggered, four-year terms and half of the Senate is up for election every two years. Missouri holds elections for its legislature in even years.
2026
- See also: Missouri State Senate elections, 2026
Elections for the Missouri State Senate will take place in 2026. The general election is on November 3, 2026.
2024
- See also: Missouri State Senate elections, 2024
Elections for the Missouri State Senate took place in 2024. The general election was on November 5, 2024. The primary was August 6, 2024. The filing deadline was March 26, 2024.
In the 2024 elections, Republicans maintained their 24-10 majority.
| Missouri State Senate | |||
|---|---|---|---|
| Party | As of November 5, 2024 | After November 6, 2024 | |
| Democratic Party | 7 | 10 | |
| Republican Party | 23 | 24 | |
| Vacancy | 4 | 0 | |
| Total | 34 | 34 | |
2022
- See also: Missouri State Senate elections, 2022
Elections for the Missouri State Senate took place in 2022. The general election was on November 8, 2022. A primary was scheduled for August 2, 2022. The filing deadline was March 29, 2022.
Heading into the 2022 elections, Republicans held a 24-10 majority in the Missouri State Senate. There were no changes in partisan control and Republicans maintained their 24-10 majority.
| Missouri State Senate | |||
|---|---|---|---|
| Party | As of November 8, 2022 | After November 9, 2022 | |
| Democratic Party | 10 | 10 | |
| Republican Party | 24 | 24 | |
| Total | 34 | 34 | |
2020
- See also: Missouri State Senate elections, 2020
Elections for the office of Missouri State Senate took place in 2020. The general election was held on November 3, 2020. A primary was scheduled for August 4, 2020. The filing deadline was March 31, 2020.
Heading into the 2020 elections, Republicans held a 23-8 majority in the Missouri State Senate with three vacancies. Republicans gained one seat in the election, giving them a 24-10 majority.
| Missouri State Senate | |||
|---|---|---|---|
| Party | As of November 3, 2020 | After November 4, 2020 | |
| Democratic Party | 8 | 10 | |
| Republican Party | 23 | 24 | |
| Vacancy | 3 | 0 | |
| Total | 34 | 34 | |
2018
- See also: Missouri State Senate elections, 2018
Elections for the Missouri State Senate took place in 2018. The open primary election took place on August 7, 2018, and the general election was held on November 6, 2018. The candidate filing deadline was March 27, 2018.[1]
In the 2018 elections, Republicans increased their majority in the Missouri State Senate from 23-10 to 24-10.
| Missouri State Senate | |||
|---|---|---|---|
| Party | As of November 6, 2018 | After November 7, 2018 | |
| Democratic Party | 10 | 10 | |
| Republican Party | 23 | 24 | |
| Vacancy | 1 | 0 | |
| Total | 34 | 34 | |
2016
- See also: Missouri State Senate elections, 2016
Elections for the Missouri State Senate took place in 2016. The primary election was held on August 2, 2016, and the general election was held on November 8, 2016. The candidate filing deadline was March 29, 2016. A total of 18 seats out of the 34 seats in the Missouri State Senate were up for election in 2016.
Heading into the election, Republicans held a 24-7 majority with three vacancies. Republicans gained one seat in the election, giving them a 25-9 majority.
| Missouri State Senate | |||
|---|---|---|---|
| Party | As of November 7, 2016 | After November 8, 2016 | |
| Democratic Party | 7 | 9 | |
| Republican Party | 24 | 25 | |
| Vacancy | 3 | 0 | |
| Total | 34 | 34 | |
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2014
Elections for the Missouri State Senate took place in 2014. A primary election was held on August 5, 2014, followed by a general election on November 4, 2014. The signature filing deadline for candidates wishing to run in this election was March 25, 2014. Heading into the election, Republicans held a 23-9 majority with two vacancies. Republicans gained two seats in the election, giving them a 25-9 majority.
2012
Elections for the office of Missouri State Senate took place in 2012. The primary election was held on August 7, 2012, and the general election was held on November 6, 2012. The candidate filing deadline was March 27, 2012. A total of 17 seats were up for election. Heading into the election, Republicans held a 26-8 majority. Republicans lost two seats in the election, giving them a 24-10 majority.
The table below details the 10 districts with the smallest margin of victory in the November 6 general election in 2012.
During the 2012 election, the total value of contributions to Senate candidates was $14,925,692. The top 10 contributors were:[2]
2010
Elections for the office of Missouri State Senate took place in 2010. The primary election was held on August 3, 2010, and the general election was held on November 2, 2010. The candidate filing deadline was March 30, 2010. Heading into the election, Republicans held a 23-11 majority. Republicans gained three seats in the election, giving them a 26-8 majority.
In 2010, the candidates for state senate raised a total of $12,861,549 in campaign contributions. The top 10 donors were:[3]
2008
Elections for the office of Missouri State Senate consisted of a primary election on August 5, 2008, and a general election on November 4, 2008. A total of 17 seats were up for election. During the 2008 election, the total value of contributions to Senate candidates was $9,291,012. The top 10 contributors were:[4]
2006
Elections for the office of Missouri State Senate consisted of a primary election on August 8, 2006, and a general election on November 7, 2006. A total of 17 seats were up for election. During the 2006 election, the total value of contributions to Senate candidates was $8,555,192. The top 10 contributors were:[5]
2004
Elections for the office of Missouri State Senate consisted of a primary election on August 3, 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 Senate candidates was $6,925,632. The top 10 contributors were:[6]
2002
Elections for the office of Missouri State Senate consisted of a primary election on August 6, 2002, and a general election on November 5, 2002. A total of 17 seats were up for election. During the 2002 election, the total value of contributions to Senate candidates was $6,170,638. The top 10 contributors were:[7]
2000
Elections for the office of Missouri State Senate consisted of a primary election on August 8, 2000, and a general election on November 7, 2000. A total of 17 seats were up for election. During the 2000 election, the total value of contributions to Senate candidates was $4,329,564. The top 10 contributors were:[8]
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Historical party control
Republicans won control of the Missouri State Senate in 2002. In 2024, they won a 24-10 majority.
The table below shows the partisan history of the Missouri 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.
Missouri 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 | 20[9] | 19 | 19 | 18 | 17* | 14 | 11 | 13 | 11 | 8 | 10 | 9 | 9 | 10 | 10 | 10 | 10 |
| Republicans | 13 | 15 | 15 | 16 | 17 | 20 | 23 | 21 | 23 | 26 | 24 | 25 | 25 | 24 | 24 | 24 | 24 |
| Other | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
*Since no party had majority control, leadership of the chamber was split between the two parties.
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, Missouri was under the following types of trifecta control:
- Democratic trifecta: 1993-2000,
- Republican trifecta: 2005-2008, 2017-2023
- Divided government: 1992, 2001-2004, 2009-2016
Missouri Party Control: 1992-2025
Eight years of Democratic trifectas • Thirteen 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 | R | D | D | D | D | D | D | D | D | D | D | D | D | R | R | R | R | D | D | D | D | D | D | D | D | R | R | R | R | R | R | R | R | R |
| Senate | D | D | D | D | D | D | 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 |
| House | D | D | D | D | D | D | D | D | 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 |
Footnotes
- ↑ Missouri Secretary of State, "2018 Missouri Election Calendar," accessed July 13, 2017
- ↑ Follow the Money, "Missouri 2012 - Candidates," accessed August 4, 2014
- ↑ Follow the Money, "Missouri 2010 - Candidates," accessed August 4, 2014
- ↑ Follow the Money, "Missouri 2008 - Candidates," accessed August 4, 2014
- ↑ Follow the Money, "Missouri 2006 - Candidates," accessed August 4, 2014
- ↑ Follow the Money, "Missouri 2004 - Candidates," accessed August 4, 2014
- ↑ Follow the Money, "Missouri 2002 - Candidates," accessed August 4, 2014
- ↑ Follow the Money, "Missouri 2000 - Candidates," accessed August 4, 2014
- ↑ In 1992, one seat was held by a member from a minor party.
