Illinois Senate District 31
State Senate District 31
Covers part of Lake County.
Who Holds This Seat
Running in 2026
No 2026 candidates are on file for this seat yet.
The District
Includes Grayslake, Old Mill Creek, Zion, Waukegan (part), Gurnee (part), Wadsworth (part), Beach Park, Round Lake, Round Lake Beach, Libertyville (part), Winthrop Harbor, Lindenhurst (part) and 8 more.
136 precincts · District lines: State senate lines: U.S. Census Bureau (1:500,000 cartographic boundary) · 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; Lake County IL GIS, LakeCounty_PoliticalBoundaries FeatureServer/7 (Voting Precincts); 2022 and 2024 generals
Results in This District
| Contest | First | Second | Margin | Votes | Source |
|---|---|---|---|---|---|
| 2024 President136 precinctsIllinois State Board of ElectionsOfficial vote | Kamala D. Harris (D)54,769 · 57.5% | Donald J. Trump (R)37,798 · 39.7% | D+17.8 | 95,202 | Illinois State Board of ElectionsOfficial vote |
| 2022 U.S. Senate136 precinctsIllinois State Board of ElectionsOfficial vote | Tammy Duckworth (D)39,041 · 58.5% | Kathy Salvi (R)26,632 · 39.9% | D+18.6 | 66,736 | Illinois State Board of ElectionsOfficial vote |
| 2022 Governor136 precinctsIllinois State Board of ElectionsOfficial vote | Jb Pritzker (D)38,433 · 57.7% | Darren Bailey (R)25,947 · 38.9% | D+18.7 | 66,640 | Illinois State Board of ElectionsOfficial vote |
| 2020 President148 precinctsIllinois State Board of ElectionsOfficial vote | Joseph R. Biden (D)70,280 · 59.6% | Donald J. Trump (R)44,671 · 37.9% | D+21.7 | 117,980 | Illinois State Board of ElectionsOfficial vote |
| 2020 U.S. Senate148 precinctsIllinois State Board of ElectionsOfficial vote | Richard J. Durbin (D)64,388 · 55.2% | Mark C. Curran Jr. (R)46,956 · 40.2% | D+14.9 | 116,742 | 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
State Senator, District 31
2024 General Election · Nov 5, 2024| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mary Edly-AllenDemocrat | Democrat | 52,654 | 58.2% |
| Ashley JensenRepublican | Republican | 37,880 | 41.8% |
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
State Senator, District 31
2022 General Election · Nov 8, 2022| Candidate | Party | Votes | Share |
|---|---|---|---|
| Mary Edly-AllenDemocrat | Democrat | 36,702 | 56.8% |
| Adam A. SolanoRepublican | Republican | 27,934 | 43.2% |
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
State Senator, District 31
2020 General Election · Nov 3, 2020| Candidate | Party | Votes | Share |
|---|---|---|---|
| Melinda Bush | 58,274 | 58.5% | |
| Christopher Kasperski | 41,373 | 41.5% |
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