Illinois state legislative districts

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There are 177 seats in the Illinois General Assembly. All 118 seats in the Illinois House of Representatives are up for election every two years. Depending on the election year, roughly ⅓, ⅔, or all of the 59 senate seats may be up for election.

Chambers

Click the following tabs for more information about each chamber:

Senate

The Illinois State Senate is the upper chamber of the Illinois General Assembly. It is made up of 59 senators elected from individual legislative districts determined by population.

As of the 2020 Census, Illinois state senators represented an average of 217,335 residents. After the 2010 Census, each member represented 218,040 residents.

Qualifications

See also: State legislature candidate requirements by state

Article IV of the Illinois Constitution states: "To be eligible to serve as a member of the General Assembly, a person must be a United States citizen, at least 21 years old, and for the two years preceding his election or appointment a resident of the district which he is to represent."[1]

Vacancies

See also: How vacancies are filled in state legislatures

If there is a vacancy in the Illinois General Assembly, the state constitution mandates that the seat must be filled by appointment when allowed by law. The appointment must be made within 30 days after the vacancy. If a vacancy occurs in the Senate with more than twenty-eight months remaining in the term, the appointment is interim until the next general election, when a special election must be held. All other House and Senate vacancies are to be filled by an appointment from the same political party that last held the seat.[2] If the vacated seat was held by an independent (no party affiliation), the governor is to appoint an independent successor within 30 days.[3]

The vacancy must be filled by the respective party organizations covering the legislative district.[4] The respective committeemen and committeewomen representing the legislative district must vote on a replacement.[5] The person selected for the seat serves for the remainder of the unfilled term.[6]

DocumentIcon.jpg See sources: Illinois Const. Art. 4, Sec. 2(d) and Illinois Rev. Stat. ch. 10, § 5/25-6


Salaries

See also: Comparison of state legislative salaries
State legislative salaries, 2024[7]
SalaryPer diem
$89,250/year$166/day

Districts

These are links to every district in the Illinois State Senate.


Office
Illinois State Senate District 1
Illinois State Senate District 2
Illinois State Senate District 3
Illinois State Senate District 4
Illinois State Senate District 5
Illinois State Senate District 6
Illinois State Senate District 7
Illinois State Senate District 8
Illinois State Senate District 9
Illinois State Senate District 10
Illinois State Senate District 11
Illinois State Senate District 12
Illinois State Senate District 13
Illinois State Senate District 14
Illinois State Senate District 15
Illinois State Senate District 16
Illinois State Senate District 17
Illinois State Senate District 18
Illinois State Senate District 19
Illinois State Senate District 20
Illinois State Senate District 21
Illinois State Senate District 22
Illinois State Senate District 23
Illinois State Senate District 24
Illinois State Senate District 25
Illinois State Senate District 26
Illinois State Senate District 27
Illinois State Senate District 28
Illinois State Senate District 29
Illinois State Senate District 30
Illinois State Senate District 31
Illinois State Senate District 32
Illinois State Senate District 33
Illinois State Senate District 34
Illinois State Senate District 35
Illinois State Senate District 36
Illinois State Senate District 37
Illinois State Senate District 38
Illinois State Senate District 39
Illinois State Senate District 40
Illinois State Senate District 41
Illinois State Senate District 42
Illinois State Senate District 43
Illinois State Senate District 44
Illinois State Senate District 45
Illinois State Senate District 46
Illinois State Senate District 47
Illinois State Senate District 48
Illinois State Senate District 49
Illinois State Senate District 50
Illinois State Senate District 51
Illinois State Senate District 52
Illinois State Senate District 53
Illinois State Senate District 54
Illinois State Senate District 55
Illinois State Senate District 56
Illinois State Senate District 57
Illinois State Senate District 58
Illinois State Senate District 59


House

The Illinois House of Representatives is the lower house of the Illinois General Assembly. It is made of 118 representatives elected from individual legislative districts for a two-year term with no term limits.

As of the 2020 Census, Illinois state representatives represented an average of 108,667 residents. After the 2010 Census, each member represented 109,020 residents.

Qualifications

See also: State legislature candidate requirements by state

Article IV of the Illinois Constitution states: "To be eligible to serve as a member of the General Assembly, a person must be a United States citizen, at least 21 years old, and for the two years preceding his election or appointment a resident of the district which he is to represent."[8]

Vacancies

See also: How vacancies are filled in state legislatures

If there is a vacancy in the Illinois General Assembly, the state constitution mandates that the seat must be filled by appointment when allowed by law. The appointment must be made within 30 days after the vacancy. If a vacancy occurs in the Senate with more than twenty-eight months remaining in the term, the appointment is interim until the next general election, when a special election must be held. All other House and Senate vacancies are to be filled by an appointment from the same political party that last held the seat.[9] If the vacated seat was held by an independent (no party affiliation), the governor is to appoint an independent successor within 30 days.[10]

The vacancy must be filled by the respective party organizations covering the legislative district.[11] The respective committeemen and committeewomen representing the legislative district must vote on a replacement.[12] The person selected for the seat serves for the remainder of the unfilled term.[13]

DocumentIcon.jpg See sources: Illinois Const. Art. 4, Sec. 2(d) and Illinois Rev. Stat. ch. 10, § 5/25-6


Salaries

See also: Comparison of state legislative salaries
State legislative salaries, 2024[14]
SalaryPer diem
$89,250/year$166/day

Districts

These are links to every district in the Illinois House of Representatives.


Office
Illinois House of Representatives District 1
Illinois House of Representatives District 2
Illinois House of Representatives District 3
Illinois House of Representatives District 4
Illinois House of Representatives District 5
Illinois House of Representatives District 6
Illinois House of Representatives District 7
Illinois House of Representatives District 8
Illinois House of Representatives District 9
Illinois House of Representatives District 10
Illinois House of Representatives District 11
Illinois House of Representatives District 12
Illinois House of Representatives District 13
Illinois House of Representatives District 14
Illinois House of Representatives District 15
Illinois House of Representatives District 16
Illinois House of Representatives District 17
Illinois House of Representatives District 18
Illinois House of Representatives District 19
Illinois House of Representatives District 20
Illinois House of Representatives District 21
Illinois House of Representatives District 22
Illinois House of Representatives District 23
Illinois House of Representatives District 24
Illinois House of Representatives District 25
Illinois House of Representatives District 26
Illinois House of Representatives District 27
Illinois House of Representatives District 28
Illinois House of Representatives District 29
Illinois House of Representatives District 30
Illinois House of Representatives District 31
Illinois House of Representatives District 32
Illinois House of Representatives District 33
Illinois House of Representatives District 34
Illinois House of Representatives District 35
Illinois House of Representatives District 36
Illinois House of Representatives District 37
Illinois House of Representatives District 38
Illinois House of Representatives District 39
Illinois House of Representatives District 40
Illinois House of Representatives District 41
Illinois House of Representatives District 42
Illinois House of Representatives District 43
Illinois House of Representatives District 44
Illinois House of Representatives District 45
Illinois House of Representatives District 46
Illinois House of Representatives District 47
Illinois House of Representatives District 48
Illinois House of Representatives District 49
Illinois House of Representatives District 50
Illinois House of Representatives District 51
Illinois House of Representatives District 52
Illinois House of Representatives District 53
Illinois House of Representatives District 54
Illinois House of Representatives District 55
Illinois House of Representatives District 56
Illinois House of Representatives District 57
Illinois House of Representatives District 58
Illinois House of Representatives District 59
Illinois House of Representatives District 60
Illinois House of Representatives District 61
Illinois House of Representatives District 62
Illinois House of Representatives District 63
Illinois House of Representatives District 64
Illinois House of Representatives District 65
Illinois House of Representatives District 66
Illinois House of Representatives District 67
Illinois House of Representatives District 68
Illinois House of Representatives District 69
Illinois House of Representatives District 70
Illinois House of Representatives District 71
Illinois House of Representatives District 72
Illinois House of Representatives District 73
Illinois House of Representatives District 74
Illinois House of Representatives District 75
Illinois House of Representatives District 76
Illinois House of Representatives District 77
Illinois House of Representatives District 78
Illinois House of Representatives District 79
Illinois House of Representatives District 80
Illinois House of Representatives District 81
Illinois House of Representatives District 82
Illinois House of Representatives District 83
Illinois House of Representatives District 84
Illinois House of Representatives District 85
Illinois House of Representatives District 86
Illinois House of Representatives District 87
Illinois House of Representatives District 88
Illinois House of Representatives District 89
Illinois House of Representatives District 90
Illinois House of Representatives District 91
Illinois House of Representatives District 92
Illinois House of Representatives District 93
Illinois House of Representatives District 94
Illinois House of Representatives District 95
Illinois House of Representatives District 96
Illinois House of Representatives District 97
Illinois House of Representatives District 98
Illinois House of Representatives District 99
Illinois House of Representatives District 100
Illinois House of Representatives District 101
Illinois House of Representatives District 102
Illinois House of Representatives District 103
Illinois House of Representatives District 104
Illinois House of Representatives District 105
Illinois House of Representatives District 106
Illinois House of Representatives District 107
Illinois House of Representatives District 108
Illinois House of Representatives District 109
Illinois House of Representatives District 110
Illinois House of Representatives District 111
Illinois House of Representatives District 112
Illinois House of Representatives District 113
Illinois House of Representatives District 114
Illinois House of Representatives District 115
Illinois House of Representatives District 116
Illinois House of Representatives District 117
Illinois House of Representatives District 118

Redistricting

The Illinois General Assembly is responsible for drawing both congressional and state legislative district lines. Both chambers of the state legislature must approve a redistricting plan. The governor may veto the lines drawn by the state legislature.[15]

In the event that both chambers of the state legislature do not approve a legislative redistricting plan, a backup commission must draw the lines. The majority and minority leaders of each chamber must appoint two members each to the commission (one legislator and one general citizen). Of the eight commission members, no more than four may belong to the same political party. In the event that these eight members cannot approve a plan, the Illinois Supreme Court must select two individuals (from different political parties) as potential tiebreakers. The secretary of state must then appoint one of these individuals to the backup commission to break the tie.[15]

The Illinois Constitution requires that state legislative districts be "contiguous and reasonably compact." There are no such requirements in place for the state's congressional districts.[15]

State law also mandates the establishment of state legislative districts "that allow racial or language minority communities to elect--or influence the election of--the candidates of their choice, even if no comparable district would be required by the federal Voting Rights Act."[15]

The Illinois State Legislature approved new state legislative maps in a special session on August 31, 2021. Gov. J.B. Pritzker (D) signed the new maps into law on September 24, 2021.[16] These maps were revised versions of maps enacted on June 4, 2021, that the legislature based on non-census population estimates. Following the release of census data in August, the legislature reconvened to develop and approve a revised map. These maps were later subject to a federal lawsuit that was decided on December 30, 2021, with the court upholding the maps enacted on September 24, 2021.[17] Illinois House minority leader Tony McCombie (R) and five voters filed a lawsuit on January 28, 2025, alleging that the state House map enacted in 2021 was drawn unconstitutionally in Democrats' favor. [18] Learn more here.

Senate elections

Under the Illinois Constitution of 1970, senators are divided into three groups, each group having a two-year term at a different part of the decade between censuses, with the rest of the decade being taken up by two four-year terms. Depending on the election year, roughly ⅓, ⅔, or all of the senate seats may have terms ending.[19] Illinois holds elections for its legislature in even years.

2026

See also: Illinois State Senate elections, 2026

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

2024

See also: Illinois State Senate elections, 2024

Elections for the Illinois State Senate took place in 2024. The general election was on November 5, 2024. The primary was March 19, 2024. The filing deadline was December 4, 2023.

In the 2024 election, the partisan breakdown did not change. Democrats maintained their majority of 40-19.


Illinois State Senate
Party As of November 5, 2024 After November 6, 2024
     Democratic Party 40 40
     Republican Party 19 18
     Vacancy 0 1
Total 59 59

2022

See also: Illinois State Senate elections, 2022

Elections for the Illinois State Senate took place in 2022. The general election was on November 8, 2022. A primary was scheduled for June 28, 2022. The filing deadline was March 14, 2022.

In the 2022 elections, Democrats lost one net seat, decreasing their majority to 40-19. On December 9, 2022, former State Sen. Scott Bennett, who won his former seat, died due to complications of a brain tumor. In January 2023, State Sen. Jason Barickman resigned. These vacancies are not reflected on the chart below.

Illinois State Senate
Party As of November 8, 2022 After November 9, 2022
     Democratic Party 41 40
     Republican Party 18 19
Total 59 59

2020

See also: Illinois State Senate elections, 2020

Elections for the office of Illinois State Senate took place in 2020. The general election was held on November 3, 2020. A primary was scheduled for March 17, 2020. The filing deadline was December 2, 2019.

In the 2020 elections, Democrats increased their majority in the Illinois State Senate from 40–19 to 41–18.

Illinois State Senate
Party As of November 3, 2020 After November 4, 2020
     Democratic Party 40 41
     Republican Party 19 18
Total 59 59

2018

See also: Illinois State Senate elections, 2018

Elections for the Illinois State Senate took place in 2018. An open primary election took place on March 20, 2018. The general election was held on November 6, 2018. The candidate filing deadline was December 4, 2017.[20]

In the 2018 elections, Democrats increased their majority in the Illinois State Senate from 37-22 to 40-19.

Illinois State Senate
Party As of November 6, 2018 After November 7, 2018
     Democratic Party 37 40
     Republican Party 22 19
Total 59 59

2016

See also: Illinois State Senate elections, 2016

Elections for the Illinois State Senate were held in 2016. The primary election was held on March 15, 2016, and the general election was held on November 8, 2016. The candidate filing deadline was November 30, 2015.[21] A total of 40 seats out of the 59 seats in the Illinois State Senate were up for election in 2016.

Heading into the election, Democrats held a 39-20 majority. Democrats lost two seats in the election, giving them a 37-22 majority.

Illinois State Senate
Party As of November 7, 2016 After November 8, 2016
     Democratic Party 39 37
     Republican Party 20 22
Total 59 59

House elections

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

2026

See also: Illinois House of Representatives elections, 2026

Elections for the Illinois House of Representatives will take place in 2026. The general election is on November 3, 2026.

2024

See also: Illinois House of Representatives elections, 2024

Elections for the Illinois House of Representatives took place in 2024. The general election was on November 5, 2024. The primary was March 19, 2024. The filing deadline was December 4, 2023.

In the 2024 election, the partisan breakdown did not change. Democrats maintained their majority of 78-40.


Illinois House of Representatives
Party As of November 5, 2024 After November 6, 2024
     Democratic Party 78 78
     Republican Party 40 40
Total 118 118

2022

See also: Illinois House of Representatives elections, 2022

Elections for the Illinois House of Representatives took place in 2022. The general election was on November 8, 2022. A primary was scheduled for June 28, 2022. The filing deadline was March 14, 2022.

In the 2022 elections, the Democratic majority in the Illinois House of Representatives increased from 74–44 to 78–39 with one vacancy.[28]

Illinois House of Representatives
Party As of November 8, 2022 After November 9, 2022
     Democratic Party 73 78
     Republican Party 45 39
     Vacancies 0 1
Total 118 118

2020

See also: Illinois House of Representatives elections, 2020

Elections for the office of Illinois House of Representatives took place in 2020. The general election was held on November 3, 2020. A primary was scheduled for March 17, 2020. The filing deadline was December 2, 2019.

In the 2020 elections, the Democratic majority in the Illinois House of Representatives decreased from 74–44 to 73–45.

Illinois House of Representatives
Party As of November 3, 2020 After November 4, 2020
     Democratic Party 74 73
     Republican Party 44 45
Total 118 118

Selection of speaker

On January 13, 2021, Emanuel Welch (D) was elected speaker of the Illinois House of Representatives. Welch replaced former House Speaker Michael Madigan (D), the longest-serving statehouse speaker in American history and chairman of the Illinois Democratic Party. To read more about the events leading up to Welch's election, click here.

2018

See also: Illinois House of Representatives elections, 2018

Elections for the Illinois House of Representatives took place in 2018. An open primary election took place on March 20, 2018. The general election was held on November 6, 2018. The candidate filing deadline was December 4, 2017.[29]

In the 2018 elections, Democrats increased their majority in the Illinois House of Representatives from 67-51 to 74-44.

Illinois House of Representatives
Party As of November 6, 2018 After November 7, 2018
     Democratic Party 67 74
     Republican Party 51 44
Total 118 118

2016

See also: Illinois House of Representatives elections, 2016

Elections for the Illinois House of Representatives were held in 2016. The primary election was held on March 15, 2016, and the general election was held on November 8, 2016. The candidate filing deadline was November 30, 2015.[30] All 118 seats in the Illinois House of Representatives were up for election in 2016.

Heading into the election, Democrats held a 71-47 majority. Democrats lost four seats in the election, giving them a 67-51 majority.

Illinois House of Representatives
Party As of November 7, 2016 After November 8, 2016
     Democratic Party 71 67
     Republican Party 47 51
Total 118 118

District maps

State Senate


State House


See also

Footnotes

  1. Illinois General Assembly, "Constitution of the State of Illinois," accessed February 10, 2023
  2. Illinois General Assembly, "Illinois Constitution," accessed February 4, 2021 (Section Article IV, Section 2(d))
  3. Illinois General Assembly, "Illinois Compiled Statutes," accessed February 4, 2021 (Statute 10 ILCS 5/25-6)
  4. Illinois General Assembly, "Illinois Election Code," accessed February 4, 2021 (Statute 10 ILCS 5/25 6 (a), (c))
  5. Illinois General Assembly, "Illinois Election Code," accessed February 4, 2021 (Statute 10 ILCS 5/25 6 (d))
  6. Illinois General Assembly, "Illinois Election Code," accessed February 4, 2021 (Statute 10 ILCS 5/25 6 (f))
  7. National Conference of State Legislatures, "2024 Legislator Compensation," August 21, 2024
  8. Illinois General Assembly, "Constitution of the State of Illinois," accessed February 10, 2023
  9. Illinois General Assembly, "Illinois Constitution," accessed February 4, 2021 (Section Article IV, Section 2(d))
  10. Illinois General Assembly, "Illinois Compiled Statutes," accessed February 4, 2021 (Statute 10 ILCS 5/25-6)
  11. Illinois General Assembly, "Illinois Election Code," accessed February 4, 2021 (Statute 10 ILCS 5/25 6 (a), (c))
  12. Illinois General Assembly, "Illinois Election Code," accessed February 4, 2021 (Statute 10 ILCS 5/25 6 (d))
  13. Illinois General Assembly, "Illinois Election Code," accessed February 4, 2021 (Statute 10 ILCS 5/25 6 (f))
  14. National Conference of State Legislatures, "2024 Legislator Compensation," August 21, 2024
  15. 15.0 15.1 15.2 15.3 All About Redistricting, "Illinois," accessed April 16, 2015
  16. Cite error: Invalid <ref> tag; no text was provided for refs named septmapexplain
  17. Longview News-Journal, "Court upholds Illinois legislative redistricting plan," Jan. 4, 2021
  18. Democracy Docket, "Illinois Republicans Sue Over Legislative Map, Claiming it Favors Democrats," January 29, 2025
  19. Illinois General Assembly, "Policies and Procedures," accessed February 4, 2021
  20. Illinois State Board of Elections, "Election and campaign finance calendar 2018," accessed August 16, 2017
  21. Illinois State Board of Elections, "Election and Campaign Finance Calendar," accessed November 30, 2015
  22. Follow the Money, "Illinois Senate 2010 Campaign Contributions," accessed May 26, 2015
  23. Follow the Money, "Illinois 2008 Candidates," accessed July 18, 2013
  24. Follow the Money, "Illinois 2006 Candidates," accessed July 18, 2013
  25. Follow the Money, "Illinois 2004 Candidates," accessed July 18, 2013
  26. Follow the Money, "Illinois 2002 Candidates," accessed July 18, 2013
  27. Follow the Money, "Illinois 2000 Candidates," accessed July 18, 2013
  28. Representatives Tim Butler (R) and Jim Durkin (R) resigned prior to the 2023 legislative session. Mike Coffey was appointed to fill Butler's seat before the 2023 session.
  29. Illinois State Board of Elections, "Election and campaign finance calendar 2018," accessed August 16, 2017
  30. Illinois State Board of Elections, "Election and Campaign Finance Calendar," accessed November 30, 2015
  31. Follow the Money, "Illinois House 2010 Campaign Contributions," accessed July 6, 2011
  32. Follow the Money, "Illinois 2008 Candidates," accessed July 18, 2013
  33. Follow the Money, "Illinois 2006 Candidates," accessed July 18, 2013
  34. Follow the Money, "Illinois 2004 Candidates," accessed July 18, 2013
  35. Follow the Money, "Illinois 2002 Candidates," accessed July 18, 2013
  36. Follow the Money, "Illinois 2000 Candidates," accessed July 18, 2013