Illinois' 15th Congressional District
Illinois' 15th Congressional District in the United States House of Representatives is represented by Mary Miller (R).
As of the 2020 Census, Illinois representatives represented an average of 754,279 residents. After the 2010 Census, each member represented 714,688 residents.
Elections
See also: Illinois's 15th Congressional District election, 2030
There are no official candidates yet for this election.
See also: Illinois' 15th Congressional District election, 2028
There are no official candidates yet for this election.
See also: Illinois' 15th Congressional District election, 2026
General election
The primary will occur on March 17, 2026. The general election will occur on November 3, 2026. General election candidates will be added here following the primary.
Democratic primary
Democratic primary for U.S. House Illinois District 15
Paul Davis (D), Kyle Nudo (D), Randy Raley (D), and Jennifer Todd (D) are running in the Democratic primary for U.S. House Illinois District 15 on March 17, 2026.
Candidate | ||
 | Paul Davis  | |
 | Kyle Nudo | |
 | Randy Raley | |
 | Jennifer Todd | |
| ||||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
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Withdrawn or disqualified candidates
- Anthony Barnes (D)
Republican primary
Republican primary for U.S. House Illinois District 15
Incumbent Mary Miller (R), Judy Bowlby (R), and Ryan Tebrugge (R) are running in the Republican primary for U.S. House Illinois District 15 on March 17, 2026.
Candidate | ||
 | Mary Miller | |
| Judy Bowlby | ||
| Ryan Tebrugge | ||
| ||||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
See also: Illinois' 15th Congressional District election, 2024
General election
General election for U.S. House Illinois District 15
Incumbent Mary Miller (R) won election in the general election for U.S. House Illinois District 15 on November 5, 2024.
Candidate | % | Votes | ||
| ✔ | | Mary Miller (R) | 99.5 | 308,825 |
| Other/Write-in votes | 0.5% | 1,409 | ||
| Total votes: 310,234 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Democratic primary
Democratic primary for U.S. House Illinois District 15
No candidate advanced from the Democratic primary for U.S. House Illinois District 15 on March 19, 2024.
Candidate | % | Votes | ||
 | Kevin Gaither (Write-in) | 100.0 | 259 | |
| Total votes: 259 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Republican primary
Republican primary for U.S. House Illinois District 15
Incumbent Mary Miller (R) advanced from the Republican primary for U.S. House Illinois District 15 on March 19, 2024.
Candidate | % | Votes | ||
| ✔ | | Mary Miller | 100.0 | 65,205 |
| Total votes: 65,205 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
See also: Illinois' 15th Congressional District election, 2022
General election
General election for U.S. House Illinois District 15
Incumbent Mary Miller (R) defeated Paul Lange (D) in the general election for U.S. House Illinois District 15 on November 8, 2022.
Candidate | % | Votes | ||
| ✔ | | Mary Miller (R) | 71.1 | 213,007 |
 | Paul Lange (D) | 28.9 | 86,396 | |
| Total votes: 299,403 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Democratic primary
Democratic primary for U.S. House Illinois District 15
Paul Lange (D) advanced from the Democratic primary for U.S. House Illinois District 15 on June 28, 2022.
Candidate | % | Votes | ||
| ✔ | | Paul Lange | 100.0 | 21,433 |
| Total votes: 21,433 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Republican primary
Republican primary for U.S. House Illinois District 15
Incumbent Mary Miller (R) defeated incumbent Rodney Davis (R) in the Republican primary for U.S. House Illinois District 15 on June 28, 2022.
Candidate | % | Votes | ||
| ✔ | | Mary Miller | 57.4 | 64,549 |
 | Rodney Davis | 42.6 | 47,852 | |
| Total votes: 112,401 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
See also: Illinois' 15th Congressional District election, 2020
General election
General election for U.S. House Illinois District 15
Mary Miller (R) defeated Erika Weaver (D) in the general election for U.S. House Illinois District 15 on November 3, 2020.
Candidate | % | Votes | ||
| ✔ | | Mary Miller (R) | 73.4 | 244,947 |
 | Erika Weaver (D) | 26.6 | 88,559 | |
| Total votes: 333,506 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Withdrawn or disqualified candidates
Democratic primary
Democratic primary for U.S. House Illinois District 15
Erika Weaver (D) defeated Kevin Gaither (D), Craig Morton (D), and John Hursey Jr. (D) in the Democratic primary for U.S. House Illinois District 15 on March 17, 2020.
Candidate | % | Votes | ||
| ✔ | | Erika Weaver | 51.9 | 17,778 |
| | Kevin Gaither | 22.3 | 7,653 | |
 | Craig Morton | 19.2 | 6,576 | |
 | John Hursey Jr. | 6.6 | 2,244 | |
| Total votes: 34,251 (100% precincts reporting) | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Republican primary
Republican primary for U.S. House Illinois District 15
Mary Miller (R) defeated Darren Duncan (R), Kerry Wolff (R), and Charles Ellington (R) in the Republican primary for U.S. House Illinois District 15 on March 17, 2020.
Candidate | % | Votes | ||
| ✔ | | Mary Miller | 57.4 | 48,129 |
 | Darren Duncan | 21.8 | 18,309 | |
| Kerry Wolff | 13.4 | 11,208 | ||
 | Charles Ellington | 7.4 | 6,200 | |
| Total votes: 83,846 (100% precincts reporting) | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Withdrawn or disqualified candidates
- John Christian Bambenek (R)
- Lori Fuller (R)
- Kent Gray (R)
- Jacob Lane (R)
- Ron McCuan (R)
- Kimberly Wade (R)
- Alex Walker (R)
See also: Illinois' 15th Congressional District election, 2018
General election
General election for U.S. House Illinois District 15
Incumbent John Shimkus (R) defeated Kevin Gaither (D) in the general election for U.S. House Illinois District 15 on November 6, 2018.
Candidate | % | Votes | ||
| ✔ |  | John Shimkus (R) | 70.9 | 181,294 |
| | Kevin Gaither (D) | 29.1 | 74,309 | |
| Other/Write-in votes | 0.0% | 5 | ||
| Total votes: 255,608 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Democratic primary
Democratic primary for U.S. House Illinois District 15
Kevin Gaither (D) defeated Carl Spoerer (D) in the Democratic primary for U.S. House Illinois District 15 on March 20, 2018.
Candidate | % | Votes | ||
| ✔ | | Kevin Gaither | 62.1 | 17,300 |
 | Carl Spoerer | 37.9 | 10,573 | |
| Total votes: 27,873 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
Republican primary
Republican primary for U.S. House Illinois District 15
Incumbent John Shimkus (R) advanced from the Republican primary for U.S. House Illinois District 15 on March 20, 2018.
Candidate | % | Votes | ||
| ✔ | | John Shimkus | 100.0 | 73,825 |
| Total votes: 73,825 | |||
| = candidate completed the Ballotpedia Candidate Connection survey. | ||||
| If you are a candidate and would like to tell readers and voters more about why they should vote for you, complete the Ballotpedia Candidate Connection Survey. | ||||
Do you want a spreadsheet of this type of data? Contact our sales team. | ||||
District map
Redistricting
2020-2021
Illinois enacted a congressional map on November 24, 2021, after Gov. J.B. Pritzker (D) signed the proposal into law.[11] The Illinois State Senate voted 41-18 in favor of the map on October 28, 2021, followed by the Illinois House of Representatives voting 71-43 in favor on October 29, 2021.[12]
How does redistricting in Illinois work? 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.[13]
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.[13]
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.[13]
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."[13]
2020
2024
2010-2011
In 2011, the Illinois State Legislature re-drew the congressional districts based on updated population information from the 2010 census.
District analysis
- See also: The Cook Political Report's Partisan Voter Index
- See also: FiveThirtyEight's elasticity scores
2026
Heading into the 2026 elections, based on results from the 2024 and 2020 presidential elections, the Cook Partisan Voter Index for this district is R+20. This meant that in those two presidential elections, this district's results were 20 percentage points more Republican than the national average. This made Illinois' 15th the 32nd most Republican district nationally.[14]
2024
Heading into the 2024 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+22. This meant that in those two presidential elections, this district's results were 22 percentage points more Republican than the national average. This made Illinois' 15th the 29th most Republican district nationally.[15]
Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Donald Trump (R) would have defeated Joe Biden (D) 68.3%-29.6%.[16]
2022
Heading into the 2022 elections, based on results from the 2020 and 2016 presidential elections, the Cook Partisan Voter Index for this district was R+22. This meant that in those two presidential elections, this district's results were 22 percentage points more Republican than the national average. This made Illinois' 15th the 26th most Republican district nationally.[17]
Daily Kos calculated what the results of the 2020 presidential election in this district would have been following redistricting. Joe Biden (D) would have received 29.6% of the vote in this district and Donald Trump (R) would have received 68.3%.[18]
2018
Heading into the 2018 elections, based on results from the 2016 and 2012 presidential elections, the Cook Partisan Voter Index for this district was R+21. This meant that in those two presidential elections, this district's results were 21 percentage points more Republican than the national average. This made Illinois' 15th Congressional District the 29th most Republican nationally.[19]
FiveThirtyEight's September 2018 elasticity score for states and congressional districts measured "how sensitive it is to changes in the national political environment." This district's elasticity score was 1.10. This means that for every 1 point the national political mood moved toward a party, the district was expected to move 1.10 points toward that party.[20]
See also
- Redistricting in Illinois
- Illinois' 15th Congressional District election, 2024
- Illinois' 15th Congressional District election, 2022
- Illinois' 15th Congressional District election, 2020
- Illinois' 15th Congressional District election, 2018
External links
Footnotes
- ↑ Illinois State Board of Elections, "Candidate List," accessed November 30, 2015
- ↑ The New York Times, "Illinois Primary Results," March 15, 2016
- ↑ News Gazette, "Thorsland acknowledges challenges in bid for Congress," accessed October 4, 2013
- ↑ Politico, "2012 Election Map, Illinois"
- ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 2, 2010," accessed March 28, 2013
- ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 4, 2008," accessed March 28, 2013
- ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 7, 2006," accessed March 28, 2013
- ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 2, 2004," accessed March 28, 2013
- ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 5, 2002," accessed March 28, 2013
- ↑ U.S. Congress House Clerk, "Statistics of the Congressional Election of November 7, 2000," accessed March 28, 2013
- ↑ The Associated Press, "Gov. Pritzker signs new Illinois congressional map into law," Nov. 24, 2021
- ↑ Chicago Tribune, "Fourth version of a Democratic-drawn congressional map passed by legislators, heads to Pritzker," Oct. 29, 2021
- ↑ 13.0 13.1 13.2 13.3 All About Redistricting, "Illinois," accessed April 16, 2015
- ↑ Cook Political Report, "2025 Cook PVI℠: District Map and List (119th Congress)," accessed July 1, 2025
- ↑ Cook Political Report, "The 2022 Cook Partisan Voting Index (Cook PVI℠)," accessed January 10, 2024
- ↑ Daily Kos, "Daily Kos Elections' 2020 presidential results by congressional district, for new and old districts," accessed September 15, 2022
- ↑ Cook Political Report, "The 2022 Cook Partisan Voting Index (Cook PVI℠)," accessed February 6, 2023
- ↑ Daily Kos, "Daily Kos Elections' 2020 presidential results by congressional district, for new and old districts," accessed September 15, 2022
- ↑ Cook Political Report, "Introducing the 2017 Cook Political Report Partisan Voter Index," April 7, 2017
- ↑ FiveThirtyEight, "Election Update: The Most (And Least) Elastic States And Districts," September 6, 2018
