Illinois 15th Congressional District
Congressional District 15
Covers all of Adams County, Pike County, Hancock County, Shelby County, Christian County, Fayette County, Montgomery County, Logan County, Edgar County, Morgan County, Mason County, Greene County, Schuyler County, De Witt County, Douglas County and 9 more; parts of Champaign County, McDonough County, Sangamon County, Madison County, Warren County, Fulton County, Macon County, Mercer County, Piatt County, Vermilion County and Coles County.
Who Holds This Seat
Running in 2026
Republican · U.S. Representative
- Ballot
- On the 2026 ballot
- Last Change
- New finance report · Oct 6
- Raised
- $1,356,250cycle to date through Jun 30
- Cash on Hand
- $810,427cycle to date through Jun 30
View on FEC.govFEC, cycle to date through Jun 30, 2026
Democrat
- Ballot
- On the 2026 ballot
- Last Change
- New finance report · Oct 9
- Raised
- $86,251cycle to date through Jun 30
- Cash on Hand
- $34,290cycle to date through Jun 30
View on FEC.govFEC, cycle to date through Jun 30, 2026
On File, Not Running
The District
Includes Godfrey (part), Decatur (part), Hillsboro, Jacksonville, Litchfield, Mahomet, Mattoon (part), Quincy, Springfield (part), Taylorville, Adair, Adams and 330 more.
934 precincts · District lines: Congressional lines: U.S. Census Bureau (1:500,000 cartographic boundary, 119th Congress) · Precinct lines: Chicago Board of Election Commissioners, Boundaries - Ward Precincts (2023-2024) (data.cityofchicago.org 6piy-vbxa) for the City of Chicago; Cook County Clerk, Suburban Cook Election Precincts - Current (datacatalog.cookcountyil.gov k7sw-w3b8); DuPage County, Election_Precincts layer (gis.dupageco.org, current, retrieved 2026-09-24); U.S. Census Bureau 2020 VTDs elsewhere in Illinois; U.S. Census Bureau 2020 TIGER/Line VTDs where no official layer; Sangamon County Clerk, ApprovedPrecincts20231012 (precincts approved 2023-10-12; 2024 general)
Results in This District
| Contest | First | Second | Margin | Votes | Source |
|---|---|---|---|---|---|
| 2024 President911 precinctsIllinois State Board of ElectionsOfficial vote | Donald J. Trump (R)226,613 · 67.8% | Kamala D. Harris (D)100,322 · 30.0% | R+37.8 | 334,442 | Illinois State Board of ElectionsOfficial vote |
| 2022 U.S. Senate789 precinctsIllinois State Board of ElectionsOfficial vote | Kathy Salvi (R)165,233 · 65.7% | Tammy Duckworth (D)80,616 · 32.1% | R+33.7 | 251,402 | Illinois State Board of ElectionsOfficial vote |
| 2022 Governor745 precinctsIllinois State Board of ElectionsOfficial vote | Darren Bailey (R)174,652 · 69.0% | Jb Pritzker (D)71,371 · 28.2% | R+40.8 | 253,117 | Illinois State Board of ElectionsOfficial vote |
| 2020 President882 precinctsIllinois State Board of ElectionsOfficial vote | Donald J. Trump (R)266,415 · 67.1% | Joseph R. Biden (D)121,867 · 30.7% | R+36.4 | 397,125 | Illinois State Board of ElectionsOfficial vote |
| 2020 U.S. Senate882 precinctsIllinois State Board of ElectionsOfficial vote | Mark C. Curran Jr. (R)249,925 · 63.7% | Richard J. Durbin (D)130,325 · 33.2% | R+30.5 | 392,098 | Illinois State Board of ElectionsOfficial vote |
Totals add up the certified precinct results for the precincts inside today's district lines. A precinct split by the district line counts in full, or only in the district holding most of its voters where the linkage assigns it to one, and votes a county reported only countywide (some counties' absentee and early votes) are left out, so totals can differ from an official canvass.
Past Results
Representative in Congress, District 15
2024 General Election · Nov 5, 2024| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mary E. MillerRepublican | Republican | 308,825 | 97.0% |
| Write-in | 8,248 | 2.6% | |
| William Bonnett | 1,198 | 0.4% | |
| William Bonnett Jr | 44 | 0.0% | |
| William Bonnett, Jr | 14 | 0.0% | |
| William Bonnet | 0 | 0.0% |
Official vote — Illinois State Board of Elections (certified canvass, precinct vote totals by election authority) · Illinois State Board of Elections — Election Vote Totals by Precinct
Representative in Congress, District 15
2022 General Election · Nov 8, 2022| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mary MillerRepublican | Republican | 213,007 | 71.1% |
| Paul J. LangeDemocrat | Democrat | 86,396 | 28.9% |
Official vote — Illinois State Board of Elections (certified canvass, precinct vote totals by election authority) · Illinois State Board of Elections — Election Vote Totals by Precinct
Representative in Congress, District 15
2020 General Election · Nov 3, 2020| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mary MillerRepublican | Republican | 244,947 | 73.4% |
| Erika C. WeaverDemocrat | Democrat | 88,559 | 26.6% |
Official vote — Illinois State Board of Elections (certified canvass, precinct vote totals by election authority) · Illinois State Board of Elections — Election Vote Totals by Precinct