From Ballotpedia Elections in Illinois, 2018
| 2018 Illinois Senate elections | |
|---|---|
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| General | November 6, 2018 |
| Primary | March 20, 2018 |
| Past election results |
| 2016・2014・2012・2010・2008 2006・2004・2002・2000 |
| 2018 elections | |
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| Choose a chamber below: | |
Democrats maintained their supermajority in the Illinois State Senate in the 2018 elections, controlling 40 seats to Republicans' 19. As of 2018, a party needed to control 36 seats in the Senate to have a three-fifths supermajority.
A total of 39 seats out of the chamber's 59 seats were up for election in 2018. Heading into the election, Democrats controlled 37 seats and Republicans controlled 22.
Democrats gained a trifecta in Illinois in 2018 by holding the state House and the state Senate and winning the governor's office.
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.[1]
The Illinois State Senate was one of 87 state legislative chambers holding elections in 2018. There are 99 chambers throughout the country. In 2017, three chambers in Virginia and New Jersey were up for election. In 2016, 86 out of 99 legislative chambers held elections. Prior to 2018, the Illinois State Senate last held elections in 2016.
For more information about the Democratic primary, click here.
For more information about the Republican primary, click here.
The Democratic Party attained supermajority status in both chambers of the Illinois General Assembly in the 2018 election. Democrats in the Illinois State Senate already held a supermajority, but Democrats in the Illinois House of Representatives did not previously hold the minimum 71 seats needed for a supermajority. In the state Senate, 39 out of 59 seats were up for election. Democrats increased their supermajority in the Illinois State Senate from 37-22 to 40-19. One Democratic incumbent was defeated in the primary and three Republican incumbents were defeated in the general election.
The Illinois House of Representatives held elections for all 118 seats. The Democratic majority in the House of Representatives increased from 67-51 to 74-44. One Democratic incumbent and one Republican incumbent were defeated in the primary. Seven incumbents were defeated in the general election; one Democrat and six Republicans.
On November 6, 2018, 87 of the nation's 99 state legislative chambers held regularly scheduled elections for 6,073 of 7,383 total seats, meaning that nearly 82 percent of all state legislative seats were up for election.
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Illinois State Senate General Election 2018 |
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Joan McCarthy Lasonde |
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Michael Connelly (i) |
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Seth Lewis |
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Chris Nybo (i) |
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| District 26 |
Tom Georges |
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Tom Rooney (i) |
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Barrett Davie |
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Soojae Lee |
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| District 32 |
Mary Mahady |
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| District 33 |
Nancy Zettler |
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| District 36 |
Gregg Johnson |
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Heidi Henry |
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| District 41 |
Bridget Fitzgerald |
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David Simpson |
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Seth McMillan |
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| District 54 |
Brian Stout |
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Hal Patton (Downstate United Party) |
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Tanya Hildenbrand |
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| District 59 |
Steve Webb |
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The candidate list below is based on an official list provided by the Illinois State Board of Elections website on December 4, 2017. The filing deadline for the March primary was on December 4, 2017. (I) denotes an incumbent.[2]
| Illinois State Senate primary candidates | |||
|---|---|---|---|
| District | Democrat |
Republican |
Other |
| 2 | Omar Aquino (I) |
No candidate | |
| 3 | Mattie Hunter (I) |
No candidate | |
| 5 | Patricia Van Pelt (I) |
No candidate | |
| 6 | John Cullerton (I) |
No candidate | |
| 8 | Ira Silverstein: 7,477 (I) Caroline McAteer-Fournier: 3,556 Ram Villivalam: 13,350 David Zulkey: 1,359 |
No candidate | |
| 9 | Laura Fine |
Joan McCarthy Lasonde |
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| 11 | Martin Sandoval (I) |
No candidate | |
| 12 | Steven Landek (I) |
No candidate | |
| 14 | Emil Jones (I) |
No candidate | |
| 15 | Napoleon Harris (I) |
No candidate | |
| 17 | Donne Trotter (I) |
No candidate | |
| 18 | Bill Cunningham (I) |
No candidate | |
| 20 | Iris Martinez: 17,411 (I) Bart Goldberg: 6,318 |
No candidate | |
| 21 | Laura Ellman |
Michael Connelly (I) |
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| 23 | Tom Cullerton (I) |
Seth Lewis |
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| 24 | Suzanne Glowiak Hilton |
Chris Nybo (I) |
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| 26 | Tom Georges |
Dan McConchie (I) |
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| 27 | Ann Gillespie: 17,699 Joe Sonnefeldt: 5,931 |
Tom Rooney (I) |
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| 29 | Julie Morrison (I) |
Barrett Davie |
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| 30 | Terry Link (I) |
Soojae Lee |
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| 32 | Mary Mahady |
Craig Wilcox |
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| 33 | Nancy Zettler |
Karen McConnaughay (I) |
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| 35 | No candidate | Dave Syverson (I) |
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| 36 | Gregg Johnson |
Neil Anderson (I) |
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| 38 | Heidi Henry |
Sue Rezin (I) |
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| 39 | Don Harmon (I) |
No candidate | |
| 41 | Bridget Fitzgerald |
John Curran (I) |
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| 42 | Linda Holmes (I) |
No candidate | |
| 44 | No candidate | Bill Brady (I) |
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| 45 | David Simpson |
Brian Stewart |
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| 47 | No candidate | Jil Tracy (I) |
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| 48 | Andy Manar (I) |
Seth McMillan |
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| 50 | No candidate | Steve McClure |
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| 51 | No candidate | Chapin Rose (I) |
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| 53 | No candidate | Jason Barickman (I) |
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| 54 | No candidate | George Barber: 2,433 Rafael Him: 2,724 Jason Plummer: 12,880 Benjamin Stratemeyer: 4,410 |
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| 56 | Rachelle Aud Crowe |
No candidate | |
| 57 | Christopher Belt |
Tanya Hildenbrand: 5,052 Bob Romanik: 2,759 |
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| 59 | No candidate | Dale Fowler (I) |
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| Notes | • An (I) denotes an incumbent. | ||
| • Candidate lists can change frequently throughout an election season. Ballotpedia staff update this list monthly. To suggest changes, click here to email our State Legislature Project. | |||
Below are election results for all contested primary elections in the Illinois State Senate in 2018. All results are unofficial.
| Illinois State Senate, District 8 Democratic Primary, 2018 | ||
|---|---|---|
| Candidate | Vote % | Votes |
| 51.31% | 14,689 | |
| Ira Silverstein Incumbent | 29.99% | 8,586 |
| Caroline McAteer-Fournier | 13.50% | 3,864 |
| David Zulkey | 5.21% | 1,491 |
| Total Votes | 28,630 | |
| Source: Illinois State Board of Elections, "2018 General Primary Official Vote Totals Book," accessed July 16, 2018 | ||
| Illinois State Senate, District 20 Democratic Primary, 2018 | ||
|---|---|---|
| Candidate | Vote % | Votes |
| 73.36% | 19,414 | |
| Bart Goldberg | 26.64% | 7,050 |
| Total Votes (144 of 151 precincts reporting) | 26,464 | |
| Source: Illinois State Board of Elections, "2018 General Primary Official Vote Totals Book," accessed July 16, 2018 | ||
| Illinois State Senate, District 27 Democratic Primary, 2018 | ||
|---|---|---|
| Candidate | Vote % | Votes |
| 74.81% | 18,279 | |
| Joe Sonnefeldt | 25.19% | 6,154 |
| Total Votes | 24,433 | |
| Source: Illinois State Board of Elections, "2018 General Primary Official Vote Totals Book," accessed July 16, 2018 | ||
| Illinois State Senate, District 54 Republican Primary, 2018 | ||
|---|---|---|
| Candidate | Vote % | Votes |
| 57.23% | 13,265 | |
| Benjamin Stratemeyer | 20.23% | 4,689 |
| Rafael Him | 11.93% | 2,766 |
| George Barber | 10.61% | 2,459 |
| Total Votes | 23,179 | |
| Source: Illinois State Board of Elections, "2018 General Primary Official Vote Totals Book," accessed July 16, 2018 | ||
| Illinois State Senate, District 57 Republican Primary, 2018 | ||
|---|---|---|
| Candidate | Vote % | Votes |
| 64.91% | 5,235 | |
| Bob Romanik | 35.09% | 2,830 |
| Total Votes | 8,065 | |
| Source: Illinois State Board of Elections, "2018 General Primary Official Vote Totals Book," accessed July 16, 2018 | ||
A margin of victory (MOV) analysis for the 2018 Illinois State Senate races is presented in this section. MOV represents the percentage of total votes that separated the winner and the second-place finisher. For example, if the winner of a race received 47 percent of the vote and the second-place finisher received 45 percent of the vote, the MOV is 2 percent.
The table below presents the following figures for each party:
| Illinois State Senate: 2018 Margin of Victory Analysis | ||||
|---|---|---|---|---|
| Party | Elections won | Elections won by less than 10% | Unopposed elections | Average margin of victory[3] |
| Total | ||||
The margin of victory in each race is presented below. The list is sorted from the closest MOV to the largest (including unopposed races).
| Illinois State Senate: 2018 Margin of Victory by District | ||||
|---|---|---|---|---|
| District | Winning Party | Losing Party | Margin of Victory | |
The below map displays each seat in the Illinois State Senate which changed partisan hands as a result of the 2018 elections, shaded according to the partisan affiliation of the winner in 2018. Hover over a shaded district for more information.
| State legislative seats flipped in 2018, Illinois State Senate | |||
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| District | Incumbent | 2018 winner | Direction of flip |
| Illinois State Senate District 21 | R to D | ||
| Illinois State Senate District 24 | R to D | ||
| Illinois State Senate District 27 | R to D | ||
Six incumbents did not run for re-election in 2018.[4] Those incumbents were:
| Name | Party | Current Office |
|---|---|---|
| Daniel K. Biss | Senate District 9 | |
| Tim Bivins | Senate District 45 | |
| William McCann | Senate District 50 | |
| Kyle McCarter | Senate District 54 | |
| William Haine | Senate District 56 | |
| James Clayborne | Senate District 57 |
See statutes: Chapter 10, Section 5, Article 7 of the Illinois Statutes
In Illinois, a candidate may run with an established political party, with a new party, as an independent candidate, or as a write-in candidate. Candidate qualification processes are detailed below.[5]
Established political party candidates, new party candidates, and independent candidates must file nomination papers with the Illinois State Board of Elections in order to qualify for placement on the ballot. These nomination papers must be filed during the designated filing period. The filing period for established party candidates begins 113 days before the primary election and ends 106 days before the primary election. New party and independent candidates have a separate filing period. Their filing period begins 141 days before the general election and ends 134 days before the general election.[6][5]
Nomination papers include the following:[5]
| Petition signature requirements | |||
|---|---|---|---|
| Office | Established party candidates | New party candidates | Independent candidates |
| Statewide office (e.g., governor and lieutenant governor, attorney general, secretary of state, comptroller, treasurer) | 5,000 (no more than 10,000) primary voters belonging to the candidate's party | 1% of the number of voters who voted in the most recent general election or 25,000, whichever is less | 1% of the number of voters who voted in the most recent general election or 25,000, whichever is less |
| United States Representative | 0.5% of primary voters in the district belonging to the candidate's party | 5% of the total number of district voters who voted in the last general election | 5% of the total number of district voters who voted in the last general election |
| State senator | 1,000 (no more than 3,000) district voters belonging to the candidate's party | 5% of the total number of district voters who voted in the last general election | 5% of the total number of district voters who voted in the last general election |
| State representative | 500 (no more than 1,500) district voters belonging to the candidate's party | 5% of the total number of district voters who voted in the last general election | 5% of the total number of district voters who voted in the last general election |
Any objections to nomination papers must be filed no later than five business days after the filing deadline.[11]
Write-in votes will not be counted unless the candidate files a declaration of intent no later than 61 days before the election in which he or she is running. This form must indicate the office being sought by the candidate.[5][12]
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.
| State legislators | |
|---|---|
| Salary | Per diem |
| $69,464/year | $151/day |
Illinois legislators assume office the second Wednesday in January.
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 | |
In the 2016 elections, the Democratic majority in the Illinois Senate decreased from 39-20 to 37-22.
| Illinois State Senate | |||
|---|---|---|---|
| Party | As of November 7, 2016 | After November 8, 2016 | |
| Democratic Party | 39 | 37 | |
| Republican Party | 20 | 22 | |
| Total | 59 | 59 | |
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. Illinois came under divided government following the 2014 elections when Republicans won control of the governor's office and Democrats retained control of the state legislature. Prior to the 2014 elections, Democrats had held a trifecta since the 2002 elections. From 1992 to 2017, there were 12 years of Democratic trifectas and two years of Republican trifectas.
Illinois Party Control: 1992-2022
Sixteen years of Democratic trifectas • Two 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Governor | R | R | R | R | R | R | R | R | R | R | R | D | D | D | D | D | D | D | D | D | D | D | D | R | R | R | R | D | D | D | D |
| Senate | D | R | R | R | R | R | R | R | R | R | R | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D |
| House | D | D | D | R | R | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D | D |
A total of 340 candidates—199 Democrats and 141 Republicans—filed for election. In 2016, 266 candidates—150 Democrats and 116 Republicans—filed for state legislative races in Illinois. There were 235 candidates in 2014. The 340 candidates who filed for election in 2018 represent about a 28 percent increase over 2016, with Democratic and Republican candidates splitting that increase fairly evenly.
The number of primaries held also increased with the number of candidates who filed for election. In 2018, Democrats held 34 primaries between the two chambers, while Republicans held 27 primaries. In 2016, there were 18 Democratic primaries and 15 Republican primaries. There were 13 Democratic primaries and 16 Republican primaries in 2014. About 20 percent of incumbents faced primary opposition in 2018. From 2010 to 2016, around 11 percent of incumbents faced a primary opponent in Illinois legislative races.
On September 28, 2017, sitting Gov. Bruce Rauner (R) signed HB 40, a bill passed by the state Legislature that spring. The bill removed a provision in Illinois law that would have made abortion illegal in the state in the event that the U.S. Supreme Court overturned its ruling in Roe v. Wade. The bill also required that Medicaid and state employee health insurance plans cover abortions.[39] Rauner's decision to sign the bill was criticized by opponents of the bill within the Illinois Republican Party, who argued that the governor had indicated in the spring that he would issue a veto if given the opportunity. A Chicago Tribune story published shortly after Rauner's signature reported that State House Minority Leader Peter Breen (R) had called for members of the Illinois Republican Party to unite behind a candidate to challenge Rauner.[40] At the time of Rauner's signature on HB 40, he had one declared opponent in the Republican primary, William Kelly.
This chart tracks Illinois Republican state legislators that Ballotpedia identified as opposing Gov. Rauner's signing of HB 40. Their positions were determined by their public statements. As of October 10, 2017, four of 22 Senate Republicans—18.2 percent—had publicly opposed Rauner on HB 40.
| Illinois Senate Republican HB 40 opponents | |
|---|---|
| District | Member |
| District 26 | Dan McConchie[41] |
| District 38 | Sue Rezin[41] |
| District 44 | Bill Brady[42] |
| District 54 | Kyle McCarter[43] |
The term wave election is frequently used to describe an election cycle in which one party makes significant electoral gains. How many seats would Republicans have had to lose for the 2018 midterm election to be considered a wave election?
Ballotpedia examined the results of the 50 election cycles that occurred between 1918 and 2016—spanning from President Woodrow Wilson's (D) second midterm in 1918 to Donald Trump's (R) first presidential election in 2016. We define wave elections as the 20 percent of elections in that period resulting in the greatest seat swings against the president's party.
Applying this definition to state legislative elections, we found that Republicans needed to lose 494 seats for 2018 to qualify as a wave election.
The chart below shows the number of seats the president's party lost in the 10 state legislative waves from 1918 to 2016. Click here to read the full report.
| State legislative wave elections | ||||||
|---|---|---|---|---|---|---|
| Year | President | Party | Election type | State legislative seats change | Elections analyzed[44] | |
| 1932 | Hoover | R | Presidential | -1,022 | 7,365 | |
| 1922 | Harding | R | First midterm | -907 | 6,907 | |
| 1966 | Johnson | D | First midterm[45] | -782 | 7,561 | |
| 1938 | Roosevelt | D | Second midterm | -769 | 7,179 | |
| 1958 | Eisenhower | R | Second midterm | -702 | 7,627 | |
| 2010 | Obama | D | First midterm | -702 | 7,306 | |
| 1974 | Ford | R | Second midterm[46] | -695 | 7,481 | |
| 1920 | Wilson | D | Presidential | -654 | 6,835 | |
| 1930 | Hoover | R | Presidential | -640 | 7,361 | |
| 1954 | Eisenhower | R | First midterm | -494 | 7,513 | |
Every year, Ballotpedia uses official candidate lists from each state to examine the competitiveness of every state legislative race in the country. Nationally, there has been a steady decline in electoral competitiveness since 2010. Most notable is that the number of districts with general election competition has dropped by more than 10 percent.
Below is Ballotpedia's 2016 competitiveness analysis. Click here to read the full study »

Uncontested elections: In 2014, 32.8 percent of Americans lived in states with an uncontested state senate election. Similarly, 40.4 percent of Americans lived in states with uncontested house elections. Primary elections were uncontested even more frequently, with 61 percent of people living in states with no contested primaries. Uncontested elections often occur in locations that are so politically one-sided that the result of an election would be a foregone conclusion regardless of whether it was contested or not.

Open seats: In most cases, an incumbent will run for re-election, which decreases the number of open seats available. In 2014, 83 percent of the 6,057 seats up for election saw the incumbent running for re-election. The states that impose term limits on their legislatures typically see a higher percentage of open seats in a given year because a portion of incumbents in each election are forced to leave office. Overall, the number of open seats decreased from 2012 to 2014, dropping from 21.2 percent in 2012 to 17.0 percent in 2014.
Incumbent win rates: Ballotpedia's competitiveness analysis of elections between 1972 and 2014 documented the high propensity for incumbents to win re-election in state legislative elections. In fact, since 1972, the win rate for incumbents had not dropped below 90 percent—with the exception of 1974, when 88 percent of incumbents were re-elected to their seats. Perhaps most importantly, the win rate for incumbents generally increased over time. In 2014, 96.5 percent of incumbents were able to retain their seats. Common convention holds that incumbents are able to leverage their office to maintain their seat. However, the high incumbent win rate may actually be a result of incumbents being more likely to hold seats in districts that are considered safe for their party.
Marginal primaries: Often, competitiveness is measured by examining the rate of elections that have been won by amounts that are considered marginal (5 percent or less). During the 2014 election, 90.1 percent of primary and general election races were won by margins higher than 5 percent. Interestingly, it is usually the case that only one of the two races—primary or general—will be competitive at a time. This means that if a district's general election is competitive, typically one or more of the district's primaries were won by more than 5 percent. The reverse is also true: If a district sees a competitive primary, it is unlikely that the general election for that district will be won by less than 5 percent. Primaries often see very low voter turnout in comparison to general elections. In 2014, there were only 27 million voters for state legislative primaries, but approximately 107 million voters for the state legislative general elections.
Eleven of 102 Illinois counties—10.8 percent—are Pivot Counties. These are counties that voted for Barack Obama (D) in 2008 and 2012 and for Donald Trump (R) in 2016. Altogether, the nation had 206 Pivot Counties, with most being concentrated in upper midwestern and northeastern states.
| Counties won by Trump in 2016 and Obama in 2012 and 2008 | |||||||
|---|---|---|---|---|---|---|---|
| County | Trump margin of victory in 2016 | Obama margin of victory in 2012 | Obama margin of victory in 2008 | ||||
| Alexander County, Illinois | 8.30% | 13.65% | 12.62% | ||||
| Carroll County, Illinois | 26.69% | 1.49% | 4.81% | ||||
| Fulton County, Illinois | 14.93% | 11.04% | 21.33% | ||||
| Henderson County, Illinois | 28.43% | 12.25% | 17.67% | ||||
| Henry County, Illinois | 20.99% | 3.08% | 7.74% | ||||
| Jo Daviess County, Illinois | 14.64% | 1.16% | 10.49% | ||||
| Knox County, Illinois | 2.91% | 17.37% | 19.89% | ||||
| Mercer County, Illinois | 20.36% | 7.39% | 11.91% | ||||
| Putnam County, Illinois | 19.92% | 1.82% | 15.64% | ||||
| Warren County, Illinois | 16.50% | 5.47% | 8.08% | ||||
| Whiteside County, Illinois | 6.18% | 17.02% | 17.56% | ||||
In the 2016 presidential election, Hillary Clinton (D) won Illinois with 55.8 percent of the vote. Donald Trump (R) received 38.8 percent. In presidential elections between 1900 and 2016, Illinois voted Republican 50 percent of the time and Democratic 50 percent of the time. Illinois voted Democratic in all five elections from 2000 to 2016.
The following table details results of the 2012 and 2016 presidential elections by state Senate districts in Illinois. Click [show] to expand the table. The "Obama," "Romney," "Clinton," and "Trump" columns describe the percent of the vote each presidential candidate received in the district. The "2012 Margin" and "2016 Margin" columns describe the margin of victory between the two presidential candidates in those years. The "Party Control" column notes which party held that seat heading into the 2018 general election. Data on the results of the 2012 and 2016 presidential elections broken down by state legislative districts was compiled by Daily Kos.[47][48]
| In 2012, Barack Obama (D) won 38 out of 59 state Senate districts in Illinois with an average margin of victory of 37.5 points. In 2016, Hillary Clinton (D) won 42 out of 59 state Senate districts in Illinois with an average margin of victory of 36.8 points. Clinton won seven districts controlled by Republicans heading into the 2018 elections. |
| In 2012, Mitt Romney (R) won 21 out of 59 state Senate districts in Illinois with an average margin of victory of 14 points. In 2016, Donald Trump (R) won 17 out of 59 state Senate districts in Illinois with an average margin of victory of 24.8 points. Trump won two districts controlled by Democrats heading into the 2018 elections. |
| 2016 presidential results by state Senate District | |||||||
|---|---|---|---|---|---|---|---|
| District | Obama | Romney | 2012 Margin | Clinton | Trump | 2016 Margin | Party Control |
| 1 | 82.98% | 15.32% | D+67.7 | 81.12% | 14.52% | D+66.6 | D |
| 2 | 83.27% | 14.47% | D+68.8 | 83.59% | 11.87% | D+71.7 | D |
| 3 | 86.67% | 12.37% | D+74.3 | 86.36% | 10.19% | D+76.2 | D |
| 4 | 82.99% | 16.10% | D+66.9 | 82.77% | 13.77% | D+69 | D |
| 5 | 88.27% | 10.52% | D+77.8 | 88.58% | 7.72% | D+80.9 | D |
| 6 | 71.85% | 25.77% | D+46.1 | 80.95% | 13.24% | D+67.7 | D |
| 7 | 84.91% | 12.56% | D+72.4 | 85.94% | 9.36% | D+76.6 | D |
| 8 | 64.03% | 34.54% | D+29.5 | 66.52% | 29.34% | D+37.2 | D |
| 9 | 64.22% | 34.39% | D+29.8 | 73.17% | 21.62% | D+51.6 | D |
| 10 | 57.75% | 40.45% | D+17.3 | 55.74% | 39.49% | D+16.3 | D |
| 11 | 72.92% | 25.65% | D+47.3 | 73.05% | 22.88% | D+50.2 | D |
| 12 | 72.11% | 26.28% | D+45.8 | 73.18% | 22.19% | D+51 | D |
| 13 | 89.07% | 10.03% | D+79 | 88.82% | 8.06% | D+80.8 | D |
| 14 | 80.73% | 18.60% | D+62.1 | 77.38% | 19.76% | D+57.6 | D |
| 15 | 83.30% | 16.00% | D+67.3 | 80.92% | 16.25% | D+64.7 | D |
| 16 | 84.62% | 14.73% | D+69.9 | 79.80% | 17.49% | D+62.3 | D |
| 17 | 83.80% | 15.60% | D+68.2 | 80.67% | 16.84% | D+63.8 | D |
| 18 | 56.76% | 41.90% | D+14.9 | 54.95% | 40.47% | D+14.5 | D |
| 19 | 59.30% | 39.61% | D+19.7 | 57.34% | 38.50% | D+18.8 | D |
| 20 | 82.11% | 15.13% | D+67 | 82.78% | 12.10% | D+70.7 | D |
| 21 | 46.23% | 52.15% | R+5.9 | 53.28% | 39.86% | D+13.4 | R |
| 22 | 63.71% | 34.52% | D+29.2 | 63.92% | 30.63% | D+33.3 | D |
| 23 | 52.74% | 45.60% | D+7.1 | 53.17% | 41.45% | D+11.7 | D |
| 24 | 46.16% | 52.24% | R+6.1 | 53.40% | 39.68% | D+13.7 | R |
| 25 | 45.12% | 53.24% | R+8.1 | 48.13% | 45.16% | D+3 | R |
| 26 | 43.00% | 55.50% | R+12.5 | 47.81% | 45.74% | D+2.1 | R |
| 27 | 48.68% | 49.79% | R+1.1 | 54.39% | 39.41% | D+15 | R |
| 28 | 55.49% | 42.87% | D+12.6 | 57.11% | 37.42% | D+19.7 | D |
| 29 | 57.14% | 41.71% | D+15.4 | 65.07% | 29.97% | D+35.1 | D |
| 30 | 66.04% | 32.75% | D+33.3 | 69.03% | 26.11% | D+42.9 | D |
| 31 | 52.62% | 45.76% | D+6.9 | 53.35% | 40.26% | D+13.1 | D |
| 32 | 44.60% | 53.54% | R+8.9 | 40.94% | 52.59% | R+11.7 | R |
| 33 | 44.76% | 53.77% | R+9 | 46.84% | 47.18% | R+0.3 | R |
| 34 | 56.83% | 41.40% | D+15.4 | 52.03% | 42.31% | D+9.7 | D |
| 35 | 46.14% | 51.97% | R+5.8 | 42.39% | 51.11% | R+8.7 | R |
| 36 | 59.51% | 38.94% | D+20.6 | 48.62% | 45.33% | D+3.3 | R |
| 37 | 44.07% | 54.22% | R+10.2 | 35.89% | 57.77% | R+21.9 | R |
| 38 | 47.72% | 50.29% | R+2.6 | 39.42% | 54.55% | R+15.1 | R |
| 39 | 75.06% | 23.59% | D+51.5 | 74.48% | 21.50% | D+53 | D |
| 40 | 57.73% | 40.91% | D+16.8 | 53.61% | 41.80% | D+11.8 | D |
| 41 | 45.51% | 52.99% | R+7.5 | 49.30% | 44.65% | D+4.7 | R |
| 42 | 63.52% | 34.93% | D+28.6 | 65.57% | 28.70% | D+36.9 | D |
| 43 | 64.43% | 33.98% | D+30.5 | 61.02% | 33.74% | D+27.3 | D |
| 44 | 38.54% | 59.33% | R+20.8 | 34.62% | 58.82% | R+24.2 | R |
| 45 | 44.42% | 53.58% | R+9.2 | 36.02% | 57.63% | R+21.6 | R |
| 46 | 56.66% | 41.18% | D+15.5 | 47.98% | 45.80% | D+2.2 | D |
| 47 | 42.95% | 55.03% | R+12.1 | 31.29% | 63.50% | R+32.2 | R |
| 48 | 50.23% | 47.57% | D+2.7 | 38.73% | 55.97% | R+17.2 | D |
| 49 | 52.93% | 45.63% | D+7.3 | 52.42% | 42.14% | D+10.3 | D |
| 50 | 39.52% | 58.35% | R+18.8 | 34.27% | 60.20% | R+25.9 | R |
| 51 | 33.63% | 64.47% | R+30.8 | 27.83% | 66.44% | R+38.6 | R |
| 52 | 55.77% | 41.50% | D+14.3 | 56.92% | 36.65% | D+20.3 | D |
| 53 | 35.40% | 62.72% | R+27.3 | 34.70% | 58.59% | R+23.9 | R |
| 54 | 34.15% | 63.79% | R+29.6 | 24.92% | 69.88% | R+45 | R |
| 55 | 32.34% | 65.63% | R+33.3 | 22.20% | 73.39% | R+51.2 | R |
| 56 | 50.09% | 47.55% | D+2.5 | 41.85% | 52.46% | R+10.6 | D |
| 57 | 61.29% | 37.07% | D+24.2 | 55.68% | 39.68% | D+16 | D |
| 58 | 42.13% | 55.37% | R+13.2 | 31.26% | 63.80% | R+32.5 | R |
| 59 | 38.88% | 59.03% | R+20.2 | 27.39% | 68.53% | R+41.1 | R |
| Total | 57.61% | 40.74% | D+16.9 | 55.96% | 38.85% | D+17.1 | - |
| Source: Daily Kos | |||||||
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Categories: [State Senate elections, 2018] [Illinois elections, 2018]
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