Missouri state legislative election results, 2024
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The sections below contain analysis of election results in the state legislative elections for Missouri in 2024.
General election results
Senate
- See also: Missouri State Senate elections, 2024
| office | candidate | party | status |
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 Doug Beck  Incumbent | Democratic | Won General | |
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= candidate completed the Ballotpedia Candidate Connection survey.
House
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 Stephanie Hein Incumbent | Democratic | Won General | |
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= candidate completed the Ballotpedia Candidate Connection survey.
Retiring incumbents
Senate
Seven incumbents did not file for re-election in 2024.[1] Those incumbents were:
House
Forty-eight incumbents did not file for re-election in 2024.[2] The average number of retirements each cycle from 2010 to 2022 was 44.7. Those incumbents were:
Primary election competitiveness
This section contains data on state legislative primary election competitiveness in Missouri. These totals include data from all regularly-scheduled House and Senate elections. For more information about Ballotpedia's competitiveness analysis of state legislative elections, please click here.
Post-filing deadline analysis
The following analysis covers all state legislative districts up for election in Missouri in 2024. Information below was calculated on June 6, 2024, and may differ from information shown in the table above due to candidate replacements and withdrawals after that time.
There were 180 state legislative seats up for election in Missouri in 2024. Across those, 55 incumbents (22 Democrats and 33 Republicans) did not run for re-election. That was more than the average number of retirements in Missouri from 2010 to 2022 (53.0). In 2022, 49 incumbents (6 Democrats and 43 Republicans) did not run for re-election. Two state legislative seats were vacant.
Twenty-six incumbents out of the 123 running faced primary challengers. That was the third-most since 2010 after 2012 and 2022 which each had 35 incumbents who faced primary challengers.
There were 67 total contested primaries (with more than one candidate) - 19 Democratic and 48 Republican. The average number of contested primaries from 2010 to 2022 was 69.86. The year with the fewest primaries was 2014, which had 49 (16 Democratic and 33 Republican). 2010 and 2012 each had 86 contested primaries, the highest number during that span.
Missouri had a Republican trifecta, meaning the Republican Party controlled the governorship and both chambers of the state legislature. As of June 5, 2024, there were 23 Republican trifectas, 17 Democratic trifectas, and 10 divided governments where neither party held trifecta control.
Senate
The table below shows the number and percentage of open seats in the Missouri State Senate from 2010 to 2024.[4]
| Open Seats in Missouri State Senate elections: 2010 - 2024 | |||
|---|---|---|---|
| Year | Total seats | Open seats | Seats with incumbents running for re-election |
| 2024 | 17 | 9 (53 percent) | 8 (47 percent) |
| 2022 | 17 | 8 (47 percent) | 9 (53 percent) |
| 2020 | 17 | 11 (65 percent) | 6 (35 percent) |
| 2018 | 17 | 8 (47 percent) | 9 (53 percent) |
| 2016 | 18 | 3 (17 percent) | 15 (83 percent) |
| 2014 | 17 | 5 (29 percent) | 12 (71 percent) |
| 2012 | 17 | 10 (59 percent) | 7 (41 percent) |
| 2010 | 17 | 10 (59 percent) | 7 (41 percent) |
House
The table below shows the number and percentage of open seats in the Missouri House of Representatives from 2010 to 2024.[5]
| Open Seats in Missouri House of Representatives elections: 2010 - 2024 | |||
|---|---|---|---|
| Year | Total seats | Open seats | Seats with incumbents running for re-election |
| 2024 | 163 | 47 (29 percent) | 116 (71 percent) |
| 2022 | 163 | 41 (25 percent) | 122 (75 percent) |
| 2020 | 163 | 46 (28 percent) | 117 (72 percent) |
| 2018 | 163 | 56 (34 percent) | 107 (66 percent) |
| 2016 | 163 | 33 (20 percent) | 130 (80 percent) |
| 2014 | 163 | 25 (15 percent) | 138 (85 percent) |
| 2012 | 163 | 44 (27 percent) | 119 (73 percent) |
| 2010 | 163 | 63 (39 percent) | 100 (61 percent) |
See also
- Elections
- Elections calendar
- Elections by state and year
- State Poll Opening and Closing Times
- State legislative elections, 2024
Footnotes
- ↑ Ballotpedia defines an incumbent as retiring if the incumbent did not file for office or filed for office but withdrew, was disqualified, or otherwise left a race in a manner other than losing the primary, primary runoff, or convention. If an incumbent runs as a write-in candidate, Ballotpedia does not consider them to be retiring. If an incumbent runs in the same chamber for a different seat, Ballotpedia does not consider them to be retiring.
- ↑ Ballotpedia defines an incumbent as retiring if the incumbent did not file for office or filed for office but withdrew, was disqualified, or otherwise left a race in a manner other than losing the primary, primary runoff, or convention. If an incumbent runs as a write-in candidate, Ballotpedia does not consider them to be retiring. If an incumbent runs in the same chamber for a different seat, Ballotpedia does not consider them to be retiring.
- ↑ Windham ran in the primary but did not appear on the general election ballot.
- ↑ Ballotpedia defines a seat as open if the incumbent did not file to run for re-election or filed but withdrew and did not appear on any ballot for his or her seat. If the incumbent withdrew from or did not participate in the primary but later chose to seek re-election to his or her seat as a third party or independent candidate, the seat would not be counted as open. If the incumbent retired or ran for a different seat in the same chamber, his or her original seat would be counted as open unless another incumbent from the same chamber filed to run for that seat, in which case it would not be counted as open due to the presence of an incumbent.
- ↑ Ballotpedia defines a seat as open if the incumbent did not file to run for re-election or filed but withdrew and did not appear on any ballot for his or her seat. If the incumbent withdrew from or did not participate in the primary but later chose to seek re-election to his or her seat as a third party or independent candidate, the seat would not be counted as open. If the incumbent retired or ran for a different seat in the same chamber, his or her original seat would be counted as open unless another incumbent from the same chamber filed to run for that seat, in which case it would not be counted as open due to the presence of an incumbent.
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