Seth Lewis
Illinois State Senator, District 24 since 2022. Lost re-election in 2026; leaves office in January 2027.
- In office
- 3 yrs
- Since 2022
- Bills became law
- 2
- 50 sponsored, 2025–2026 session
- Votes missed
- 9.4%
- Chamber median 2.8%
- With party
- 60%
- On votes splitting the parties
- Last margin
- −9.6
- Lost 2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET
Committees
As of 2026-10.
- Appropriations-Public Safety and Infrastructure · republican spokesperson
- Consumer Protection · ranking member
- Appropriations
- Child Welfare
- Financial Institutions
- Human Rights
- Transportation
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Lewis sits in the Illinois State Senate
Lewis is closer to the center than 95% of the chamber's Republicans.
Closest: Darby Hills, Don DeWitte, John Curran
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:50 PM ET
With Lewis’s party
- Votes with the chamber's Republicans60%
- Cosponsorships of the other party's bills47%
Black tick: the average of Republicans in the Illinois State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Lewis’s vote, each party’s majority, and the result. An orange vote differs from most Republicans.
| Date | Bill | Lewis | Rep. majority | Dem. majority | Result |
|---|---|---|---|---|---|
| May 31, 2026 | HB 5090: PROCUREMENT-CONSTRUCTION | Yes | No | Yes | Passed 42–12 |
| May 31, 2026 | HB 4379: ADULT CHANGING STATIONS | Yes | No | Yes | Passed 46–12 |
| May 31, 2026 | HB 4571: COUNTIES CD-AFFORDABLE HOUSING | Yes | No | Yes | Passed 44–14 |
| May 29, 2026 | HB 4758: JOB APPLICATION-DRIVER LICENSE | Yes | No | Yes | Passed 41–15 |
| May 29, 2026 | HB 4339: SCH CD-HIGH SCH-REGISTER VOTER | Yes | No | Yes | Passed 41–12 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Lewis was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.
Source: 99chambers results archive (MEDSL, Klarner, state election offices)
Elections
Margin against the seat’s presidential baseline: how the seat voted for president in the same or nearest year.
| Year | Race | Result | Margin | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | Illinois Legislative District 24 | Lost | D+9.6 | D+3.4 | −6.2 |
| 2022 | Illinois State Senate, District 24 | Won | R+3.9 | — | — |
| 2020 | Illinois House of Representatives, District 45 | Won | R+6.4 | — | — |
| 2018 | Illinois State Senate, District 23 | Lost | D+9.7 | — | — |
| 2016 | Illinois State Senate, District 23 | Lost | D+1.4 | — | — |
| 2014 | Illinois House of Representatives, District 45 (primary) | Lost | −3.7 | — | — |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $643.7K
- Spent
- $537.1K
- Cash
- $210.6K
Source: Illinois State Board of Elections filings through Sep 30, 2026Updated Nov 1, 2026, 9:15 AM ET
Campaign committees
Open committees can still raise and spend money.
| Citizens for Seth Lewis State | Active |
Source: Illinois State Board of Elections filings through Sep 30, 2026Updated Nov 1, 2026, 9:15 AM ET
Seats Lewis has held
- Illinois State Senate, District 24 · since 2022
- Illinois House of Representatives, District 45 · 2020–2022
Source: 99chambers results archive
Who Lewis has run against
- Benjamin "Ben" McAdams (D) · 2026 general, lost
- Lauren Nowak (D) · 2022 election, won
- Diane Pappas (D) · 2020 election, won
- Thomas E. Cullerton (D) · 2018 election, lost
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Lewis
One person, matched across every source we use.
- Open States ocd-person/0b9e2838-eeb0-4d10-8292-64a9e9f54dc1
- Wikidata Q105093920
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:51 PM ET