2018 Illinois elections
A general election was held in the U.S. state of Illinois on November 6, 2018. The elections for Illinois's 18 congressional districts, Governor, statewide constitutional officers, Illinois Senate, and Illinois House were held on this date.
Primaries were held March 20, 2018.
The Democratic Party made gains, including picking up the state's governorship and flipping two of its U.S. House seats. After the election, all executive offices and control of the Illinois General Assembly was held by the Democratic Party. Conversely the Republican Party experienced what was regarded to be their worst defeat in the state since at least 2006.
Election information
2018 was a midterm election year in the United States.Turnout
Primary election
For the primary election, turnout was 26.48%, with 2,103,634 votes cast.;Turnout by county
| County | Registration | Votes cast | Turnout |
| Adams | 47,422 | 6,670 | 14.07% |
| Alexander | 5,303 | 1,691 | 31.89% |
| Bond | 10,978 | 2,854 | 26% |
| Boone | 32,552 | 7,525 | 23.12% |
| Brown | 3,337 | 662 | 19.84% |
| Bureau | 23,661 | 7,446 | 31.47% |
| Calhoun | 3,542 | 905 | 25.55% |
| Carroll | 10,449 | 3,329 | 31.86% |
| Cass | 7,704 | 1,819 | 23.61% |
| Champaign | 119,979 | 31,574 | 26.32% |
| Christian | 20,925 | 4,294 | 20.52% |
| Clark | 11,886 | 4,826 | 40.6% |
| Clay | 8,809 | 2,935 | 33.32% |
| Clinton | 24,486 | 5,462 | 22.31% |
| Coles | 29,515 | 9,238 | 31.3% |
| Cook | 3,043,887 | 938,639 | 30.84% |
| Crawford | 12,328 | 4,239 | 34.39% |
| Cumberland | 7,636 | 3,030 | 39.68% |
| DeKalb | 56,946 | 14,531 | 25.52% |
| DeWitt | 10,885 | 2,773 | 25.48% |
| Douglas | 11,564 | 3,816 | 33% |
| DuPage | 633,638 | 157,671 | 24.88% |
| Edgar | 11,968 | 2,077 | 17.35% |
| Edwards | 4,342 | 1,779 | 40.97% |
| Effingham | 23,564 | 6,023 | 25.56% |
| Fayette | 13,572 | 3,218 | 23.71% |
| Ford | 8,664 | 2,336 | 26.96% |
| Franklin | 28,534 | 5,380 | 18.85% |
| Fulton | 25,423 | 5,349 | 21.04% |
| Gallatin | 3,765 | 1,327 | 35.25% |
| Greene | 8,891 | 1,922 | 21.62% |
| Grundy | 33,916 | 8,070 | 23.79% |
| Hamilton | 5,643 | 1,631 | 28.9% |
| Hancock | 12,244 | 2,562 | 20.92% |
| Hardin | 3,176 | 900 | 28.34% |
| Henderson | 4,847 | 1,278 | 26.37% |
| Henry | 35,896 | 7,645 | 21.3% |
| Iroquois | 17,933 | 4,696 | 26.19% |
| Jackson | 31,777 | 8,683 | 27.32% |
| Jasper | 6,859 | 2,314 | 33.74% |
| Jefferson | 23,547 | 5,680 | 24.12% |
| Jersey | 15,188 | 3,073 | 20.23% |
| Jo Daviess | 15,938 | 3,708 | 23.27% |
| Johnson | 8,834 | 2,448 | 27.71% |
| Kane | 305,679 | 65,419 | 21.4% |
| Kankakee | 67,383 | 11,976 | 17.77% |
| Kendall | 72,920 | 15,883 | 21.78% |
| Knox | 32,995 | 6,517 | 19.75% |
| Lake | 439,860 | 98,944 | 22.49% |
| LaSalle | 69,838 | 16,185 | 23.18% |
| Lawrence | 8,737 | 1,546 | 17.69% |
| Lee | 22,216 | 6,147 | 27.67% |
| Livingston | 21,221 | 6,776 | 31.93% |
| Logan | 18,163 | 5,688 | 31.32% |
| Macon | 74,132 | 16,732 | 22.57% |
| Macoupin | 32,632 | 6,727 | 20.61% |
| Madison | 174,508 | 43,928 | 25.17% |
| Marion | 24,318 | 4,642 | 19.09% |
| Marshall | 8,253 | 2,892 | 35.04% |
| Mason | 9,040 | 2,007 | 22.2% |
| Massac | 10,484 | 3,183 | 30.36% |
| McDonough | 18,905 | 6,078 | 32.15% |
| McHenry | 223,579 | 48,504 | 21.69% |
| McLean | 108,708 | 28,516 | 26.23% |
| Menard | 9,089 | 3,061 | 33.68% |
| Mercer | 12,125 | 2,352 | 19.4% |
| Monroe | 25,313 | 4,012 | 15.85% |
| Montgomery | 15,873 | 5,521 | 34.78% |
| Morgan | 21,747 | 6,244 | 28.71% |
| Moultrie | 8,548 | 2,918 | 34.14% |
| Ogle | 30,493 | 8,468 | 27.77% |
| Peoria | 113,911 | 23,250 | 20.41% |
| Perry | 14,561 | 2,901 | 19.92% |
| Piatt | 12,091 | 5,378 | 44.48% |
| Pike | 10,266 | 2,548 | 24.82% |
| Pope | 2,989 | 823 | 27.53% |
| Pulaski | 4,395 | 1,252 | 28.49% |
| Putnam | 4,269 | 1,181 | 27.66% |
| Randolph | 21,563 | 3,680 | 17.07% |
| Richland | 11,517 | 4,318 | 37.49% |
| Rock Island | 86,055 | 17,265 | 20.06% |
| Saline | 16,361 | 4,578 | 27.98% |
| Sangamon | 131,964 | 31,047 | 23.53% |
| Schuyler | 5,362 | 1,350 | 25.18% |
| Scott | 3,615 | 1,411 | 39.03% |
| Shelby | 14,595 | 4,038 | 27.67% |
| Stark | 4,100 | 1,510 | 36.83% |
| St. Clair | 190,018 | 35,514 | 18.69% |
| Stephenson | 34,036 | 8,488 | 24.94% |
| Tazewell | 89,252 | 24,919 | 27.92% |
| Union | 11,849 | 3,196 | 26.97% |
| Vermilion | 45,711 | 9,999 | 21.87% |
| Wabash | 8,459 | 2,110 | 24.94% |
| Warren | 11,616 | 2,288 | 19.7% |
| Washington | 9,601 | 2,944 | 30.66% |
| Wayne | 12,193 | 3,878 | 31.81% |
| White | 10,218 | 2,557 | 25.02% |
| Whiteside | 37,379 | 8,995 | 24.06% |
| Will | 431,906 | 95,945 | 22.21% |
| Williamson | 44,661 | 9,572 | 21.43% |
| Winnebago | 176,057 | 49,517 | 28.13% |
| Woodford | 25,792 | 8,288 | 32.13% |
| 7,945,074 | 2,103,634 | 26.48% |
General election
For the general election, turnout was 57.23%, with 4,635,541 votes cast. The Illinois State Board of Elections reported that this general election turnout rate was the third-highest for a midterm election over the past forty years. The Illinois State Board of Elections also reported that the total number of votes cast set a record high. Voter registration, at 8.1 million, also sat at a record high.Turnout was considered high in the United States during the 2018 midterm elections, with it being the highest national midterm turnout since 1914.
;Turnout by county
| County | Registration | Votes cast | Turnout% |
| Adams | 47,811 | 24,611 | 51.48% |
| Alexander | 5,354 | 2,278 | 42.55% |
| Bond | 11,197 | 6,723 | 60.04% |
| Boone | 33,054 | 18,176 | 54.99% |
| Brown | 3,509 | 1,934 | 55.12% |
| Bureau | 23,847 | 13,840 | 58.04% |
| Calhoun | 3,559 | 2,377 | 66.79% |
| Carroll | 10,682 | 6,039 | 56.53% |
| Cass | 7,774 | 4,683 | 60.24% |
| Champaign | 124,057 | 80,112 | 64.58% |
| Christian | 21,209 | 13,027 | 61.42% |
| Clark | 11,936 | 6,249 | 52.35% |
| Clay | 8,948 | 4,956 | 55.39% |
| Clinton | 24,810 | 14,269 | 57.51% |
| Coles | 30,551 | 17,385 | 56.9% |
| Cook | 3,090,800 | 1,795,518 | 58.09% |
| Crawford | 12,624 | 7,022 | 55.62% |
| Cumberland | 7,712 | 4,400 | 57.05% |
| DeKalb | 60,754 | 36,610 | 60.26% |
| DeWitt | 11,083 | 6,286 | 56.72% |
| Douglas | 11,701 | 6,499 | 55.54% |
| DuPage | 639,752 | 370,249 | 57.87% |
| Edgar | 12,106 | 6,264 | 51.74% |
| Edwards | 4,406 | 2,468 | 56.01% |
| Effingham | 23,873 | 14,621 | 61.24% |
| Fayette | 13,474 | 8,011 | 59.46% |
| Ford | 8,803 | 5,061 | 57.49% |
| Franklin | 28,743 | 15,632 | 54.39% |
| Fulton | 25,576 | 12,727 | 49.76% |
| Gallatin | 3,720 | 2,205 | 59.27% |
| Greene | 8,946 | 4,441 | 49.64% |
| Grundy | 33,041 | 19,646 | 59.46% |
| Hamilton | 5,666 | 3,677 | 64.9% |
| Hancock | 12,431 | 7,143 | 57.46% |
| Hardin | 2,980 | 1,774 | 59.53% |
| Henderson | 4,836 | 2,736 | 56.58% |
| Henry | 34,493 | 19,694 | 57.1% |
| Iroquois | 17,968 | 10,388 | 57.81% |
| Jackson | 39,503 | 20,693 | 52.38% |
| Jasper | 6,882 | 4,577 | 66.51% |
| Jefferson | 24,002 | 14,264 | 59.43% |
| Jersey | 15,544 | 8,905 | 57.29% |
| Jo Daviess | 16,164 | 9,414 | 58.24% |
| Johnson | 8,879 | 5,343 | 60.18% |
| Kane | 314,170 | 172,056 | 54.77% |
| Kankakee | 68,513 | 37,012 | 54.02% |
| Kendall | 78,788 | 45,534 | 57.79% |
| Knox | 33,475 | 18,125 | 54.14% |
| Lake | 448,295 | 254,217 | 56.71% |
| LaSalle | 71,111 | 40,691 | 57.22% |
| Lawrence | 8,830 | 4,410 | 49.94% |
| Lee | 22,496 | 12,742 | 56.64% |
| Livingston | 21,591 | 12,261 | 56.79% |
| Logan | 18,396 | 10,246 | 55.7% |
| Macon | 75,161 | 39,738 | 52.87% |
| Macoupin | 32,151 | 18,458 | 57.41% |
| Madison | 180,511 | 105,432 | 58.41% |
| Marion | 24,747 | 12,786 | 51.67% |
| Marshall | 8,303 | 4,783 | 57.61% |
| Mason | 9,112 | 5,334 | 58.54% |
| Massac | 10,650 | 5,507 | 51.71% |
| McDonough | 18,464 | 10,368 | 56.15% |
| McHenry | 235,593 | 117,838 | 50.02% |
| McLean | 109,316 | 68,087 | 62.28% |
| Menard | 9,172 | 5,519 | 60.17% |
| Mercer | 12,357 | 7,130 | 57.7% |
| Monroe | 26,035 | 15,754 | 60.51% |
| Montgomery | 16,338 | 11,721 | 71.74% |
| Morgan | 22,026 | 11,870 | 53.89% |
| Moultrie | 8,547 | 5,226 | 61.14% |
| Ogle | 32,316 | 19,267 | 59.62% |
| Peoria | 117,449 | 65,865 | 56.08% |
| Perry | 14,475 | 8,672 | 59.91% |
| Piatt | 12,141 | 7,730 | 63.67% |
| Pike | 10,433 | 6,693 | 64.15% |
| Pope | 3,004 | 1,813 | 60.35% |
| Pulaski | 4,434 | 2,488 | 56.11% |
| Putnam | 4,289 | 2,645 | 61.67% |
| Randolph | 21,517 | 12,464 | 57.93% |
| Richland | 11,599 | 6,192 | 53.38% |
| Rock Island | 100,163 | 51,283 | 51.2% |
| Saline | 16,441 | 9,773 | 59.44% |
| Sangamon | 135,830 | 87,193 | 64.19% |
| Schuyler | 5,293 | 3,176 | 60% |
| Scott | 3,470 | 2,098 | 60.46% |
| Shelby | 14,878 | 9,399 | 63.17% |
| Stark | 4,093 | 2,099 | 51.28% |
| St. Clair | 192,407 | 99,849 | 51.89% |
| Stephenson | 34,461 | 16,612 | 48.21% |
| Tazewell | 90,595 | 52,368 | 57.8% |
| Union | 12,098 | 7,693 | 63.59% |
| Vermilion | 49,519 | 23,559 | 47.58% |
| Wabash | 8,004 | 4,056 | 50.67% |
| Warren | 11,612 | 6,177 | 53.19% |
| Washington | 9,777 | 6,205 | 63.47% |
| Wayne | 12,118 | 6,065 | 50.05% |
| White | 10,300 | 6,006 | 58.31% |
| Whiteside | 37,945 | 21,723 | 57.25% |
| Will | 429,647 | 249,682 | 58.11% |
| Williamson | 45,987 | 27,752 | 60.35% |
| Winnebago | 177,945 | 96,765 | 54.38% |
| Woodford | 26,224 | 16,407 | 62.56% |
| 8,099,372 | 4,635,541 | 57.23% |
Federal elections
United States House of Representatives
All of Illinois' 18 seats in the United States House of Representatives were up for election in 2018.The Democratic Party flipped two Republican-held seat, making the composition of Illinois' House delegation 13 Democrats and 5 Republicans.
State elections
Governor and Lieutenant Governor
Incumbent Republican Governor Bruce Rauner ran for re-election to a second term, but was defeated by Democratic venture capitalist and billionaire J. B. Pritzker.Republican primary
Democratic primary
General election
Attorney General
Incumbent Democratic Attorney General Lisa Madigan, who served since 2003, chose not to run for re-election to a fifth term. Democratic state Senator Kwame Raoul defeated Republican Erika Harold.Democratic primary
Republican primary
General election
Secretary of State
Incumbent Democratic Secretary of State Jesse White, who has been in office since 1999, initially announced in August 2015 that he would retire. On August 17, 2017, White reversed this decision and announced that he would run for re-election to a sixth term. Governing magazine projected the race as "safe Democratic".Democratic primary
The following candidate appeared on the ballot:- Jesse White, incumbent Secretary of State
- Mike Hastings, member of the Illinois Senate.
- Walter Burnett Jr., Alderman from Chicago's 27th ward.
Republican primary
- Jason Helland, Grundy County State’s Attorney.
- J.C. Griffin, Iraq War veteran.
Endorsements
General election results
Comptroller
Incumbent Republican Judy Baar Topinka died on December 10, 2014, after being re-elected to a second term in office. A special election was held in 2016 for the remainder of the term, with Democratic City Clerk of Chicago Susana Mendoza defeating appointed Republican Comptroller Leslie Munger. Mendoza won a full term.Democratic primary
The following candidate appeared on the ballot:- Susana Mendoza, incumbent Illinois Comptroller.
Republican primary
- Darlene Senger, former State Representative and 2014 candidate for U.S. House IL-11.
Third parties and independents
Libertarian
The following candidate appeared on the ballot:- Claire Ball, C.P.A.
General election results
Treasurer
Democratic primary
The following candidate appeared on the ballot:- Mike Frerichs, incumbent Treasurer.
Results
Republican primary
The following candidate appeared on the ballot:- Jim Dodge, Orland Park Village Trustee, and 2010 candidate for Illinois Comptroller.
Results