Illinois State Senate seat · lines in effect since 2022
Illinois Legislative District 24
A district of about 206,000 people, 51% of adults with a bachelor's degree. It votes D+4.5 relative to the nation for president.
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 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 | 2022 | 2026 | |
|---|---|---|---|---|---|
| U.S. Senate | R+6.2 | No race | D+3.6 | No race | No race |
| Governor | No race | R+7.4 | No race | No race | No race |
| Illinois State Senate | No race | No race | No race | R+3.9 | D+9.6 |
Outlined: the race for this seat itselfBlank: no race that year
Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 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 24.
Higher than 83% of seats.
Higher than 53% of seats.
Lower than 59% of seats.
Lower than 72% of seats.
Higher than 78% of seats.
Denser than 59% 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. 1 of the 4 flipped this year.
District 4155% college gradsD+8.6Held RDistrict 26
58% college gradsD+9.3Flipped DDistrict 49
43% college gradsD+11.6Not up in 2026District 27
52% college gradsD+18.8Held D
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
Who has held it
These lines took effect in 2022.
- Benjamin "Ben" McAdams (D)
2027– · Won 2026 by 9.6 - Seth Lewis (R)
2023–2027 · Won 2022 by 3.9
Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)