Illinois State Senate seat · lines in effect since 2022
Illinois Legislative District 37
A district of about 224,000 people, 27% of adults with a bachelor's degree. It votes R+19.4 relative to the nation for president.
2024 election
Nov 5, 2024- Li Arellano (R) · won100.0%
Unopposed.
Source: MIT Election Data and Science LabUpdated Sep 30, 2026, 12:13 PM ET
Where it sits among all 59 seats
Every Illinois State Senate seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.
Democratic
Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET
Every election for this seat
18 races since 1970. District numbers are redrawn after each census: each group is one set of lines.
| Year | Winner | Runner-up | Won by |
|---|---|---|---|
| Lines first used in 2022 | |||
| 2024 | Li Arellano (R) | — | Unopposed |
| 2022 | Win Stoller (R) | — | Unopposed |
| Lines first used in 2012 | |||
| 2020 | Win Stoller (R) | — | Unopposed |
| 2016 | Chuck Weaver (R) | — | Unopposed |
| 2012 | Darin LaHood (R) | — | Unopposed |
| Lines first used in 2002 | |||
| 2010 | Dale E. Risinger (R) | — | Unopposed |
| 2006 | Dale E. Risinger (R) | Bob Sheehan (D) | 19.5 |
| 2002 | Dale E. Risinger (R) | Paul Mangieri (D) | 6.9 |
| Lines first used in 1992 | |||
| 1998 | Todd Sieben (R) | — | Unopposed |
| 1996 | Todd Sieben (R) | — | Unopposed |
| 1992 | Todd Sieben (R) | Eric Gubelman (D) | 9.1 |
| Lines first used in 1982 | |||
| 1988 | Calvin W. Schuneman (R) | Pennie L. Vonberg Wessels (D) | 6.8 |
| 1984 | Calvin W. Schuneman (R) | David D. Considine (D) | 17.3 |
| 1982 | Calvin W. Schuneman (R) | David D. Considine (D) | 6.7 |
| Lines first used in 1972 | |||
| 1978 | David C. Shapiro (R) | Coe E. Mechling (D) | 39.4 |
| 1974 | David C. Shapiro (R) | Ray A. Scott (D) | 11.0 |
| 1972 | David C. Shapiro (R) | Ray A. Scott (D) | 12.7 |
| Lines first used in 1962 | |||
| 1970 | William C. Harris (R) | Robert P. Hendon (D) | 26.0 |
Won by: the winner's lead over the runner-up, in points of the vote. Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Districts that overlap District 37
The state's districts in other chambers that share residents with this one, and the share of District 37's area in each.
Every race on these lines
Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.
| 2016 | 2018 | 2020 | 2024 | |
|---|---|---|---|---|
| President | R+14.7 | No race | R+16.0 | R+18.7 |
| U.S. Senate | R+12.9 | No race | R+12.5 | No race |
| Governor | No race | R+11.4 | No race | No race |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 8, 2026, 7:01 PM ET
Who lives here, compared
Grey bars show the spread of all 59 seats. Small marks are other seats in Illinois. The black marker is District 37.
Lower than 67% of seats.
Higher than 84% of seats.
Lower than 67% of seats.
Lower than 81% of seats.
Lower than 74% of seats.
Less dense than 86% of seats.
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET
Seats most like this one
Nearest seats on demographics, density and lean.
District 4525% college gradsR+21.5Held RDistrict 44
34% college gradsR+29.0Held RDistrict 47
24% college gradsR+30.9Held RDistrict 53
26% college gradsR+35.4Held R
Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET