Illinois state legislative election results, 2024
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The sections below contain analysis of election results in the state legislative elections for Illinois in 2024.
General election results
Senate
- See also: Illinois State Senate elections, 2024
| office | candidate | party | status |
|---|---|---|---|
 | Democratic | Won General | |
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 | Republican | Lost General | |
Illinois State Senate District 5 (Special election) |  | Democratic | Won General |
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 | Republican | Lost General | |
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Illinois State Senate District 20 (Special election) | Democratic | Won General | |
Illinois State Senate District 20 (Special election) | Republican | Lost General | |
 | Democratic | Won General | |
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Republican | Lost General | ||
Illinois State Senate District 27 (Special election) |  | Democratic | Won General |
Illinois State Senate District 27 (Special election) | Republican | Lost General | |
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 Rachel Ventura  Incumbent | Democratic | Won General | |
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Illinois State Senate District 53 (Special election) | Republican | Won General | |
 | Republican | Won General | |
 | Republican | Won General |
= candidate completed the Ballotpedia Candidate Connection survey.
House
| office | candidate | party | status |
|---|---|---|---|
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Independent | Lost (Write-in) General | ||
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 | Independent | Lost General | |
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Democratic | Lost General | ||
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= candidate completed the Ballotpedia Candidate Connection survey.
Retiring incumbents
Senate
One incumbent did not file for re-election in 2024.[1] This was the lowest number of retirements since 2014. The incumbent was:
| Name | Party | Office |
|---|---|---|
| Win Stoller |  Republican |
Senate District 37 |
House
Five incumbents did not file for re-election in 2024.[2] This was the lowest number of retirements since at least 2010. Those incumbents were:
Primary election competitiveness
This section contains data on state legislative primary election competitiveness in Illinois. 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 Illinois in 2024. Information below was calculated on March 13, 2024, and may differ from information shown in the table above due to candidate replacements and withdrawals after that time.
Six seats in the Illinois Legislature were open, meaning no incumbents filed. This guaranteed that at least 4% of the seats up for election would be represented by newcomers in 2025, a decade low.
Twenty incumbents faced primary challenges, representing 15% of all incumbents running for re-election.
Of the 20 incumbents in contested primaries, 15 were Democrats and five were Republicans.
Illinois had 29 contested state legislative primaries in 2024, a 43% decrease from 2022 and a decade low (tied with 2014).
Of the 29 contested primaries, there were 18 for Democrats and 11 for Republicans. For Democrats, this was seven fewer than in 2022. For Republicans, the number was down 58% from 26 in 2022.
Overall, 232 major party candidates — 133 Democrats and 99 Republicans — filed to run. All 118 House and 20 of 59 Senate seats were up for election.
Senate
The table below shows the number and percentage of open seats in the Illinois State Senate from 2010 to 2024.[3]
| Open Seats in Illinois State Senate elections: 2010 - 2024 | |||
|---|---|---|---|
| Year | Total seats | Open seats | Seats with incumbents running for re-election |
| 2024 | 20 | 1 (5 percent) | 19 (95 percent) |
| 2022 | 59 | 8 (14 percent) | 51 (86 percent) |
| 2020 | 20 | 6 (30 percent) | 14 (70 percent) |
| 2018 | 39 | 6 (15 percent) | 33 (85 percent) |
| 2016 | 40 | 5 (13 percent) | 35 (87 percent) |
| 2014 | 19 | 1 (5 percent) | 18 (95 percent) |
| 2012 | 59 | 12 (20 percent) | 47 (80 percent) |
| 2010 | 21 | 1 (5 percent) | 20 (95 percent) |
House
The table below shows the number and percentage of open seats in the Illinois House of Representatives from 2010 to 2024.[4]
| Open Seats in Illinois House of Representatives elections: 2010 - 2024 | |||
|---|---|---|---|
| Year | Total seats | Open seats | Seats with incumbents running for re-election |
| 2024 | 118 | 5 (4 percent) | 113 (96 percent) |
| 2022 | 118 | 14 (12 percent) | 104 (88 percent) |
| 2020 | 118 | 9 (8 percent) | 109 (92 percent) |
| 2018 | 118 | 18 (15 percent) | 100 (85 percent) |
| 2016 | 118 | 10 (8 percent) | 108 (92 percent) |
| 2014 | 118 | 12 (10 percent) | 106 (90 percent) |
| 2012 | 118 | 19 (16 percent) | 99 (84 percent) |
| 2010 | 118 | 11 (9 percent) | 107 (91 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.
- ↑ 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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