Mark Walker
Illinois State Senator, District 27 since 2024. Did not run for re-election in 2026; leaves office in January 2027.
- In office
- 1 yr
- Since 2024
- Bills became law
- 6
- 25 sponsored, 2025–2026 session
- Votes missed
- 0.9%
- Chamber median 2.8%
- With party
- 100%
- On votes splitting the parties
- Last margin
- +15.1
- Won 2024
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Financial Institutions · chair
- Revenue · vice chair
- Appropriations-Education
- Environment and Conservation
- Human Rights
- Insurance
- Pensions
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 Walker sits in the Illinois State Senate
Walker is closer to the center than 64% of the chamber's Democrats.
Closest: Adriane Johnson, Laura Fine, Rachel Ventura
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:50 PM ET
With Walker’s party
- Votes with the chamber's Democrats100%
- Cosponsorships of the other party's bills5%
Black tick: the average of Democrats in the Illinois State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Walker’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Walker | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| May 31, 2026 | HB 5090: PROCUREMENT-CONSTRUCTION | Yes | Yes | No | Passed 42–12 |
| May 31, 2026 | HB 4379: ADULT CHANGING STATIONS | Yes | Yes | No | Passed 46–12 |
| May 31, 2026 | HB 4571: COUNTIES CD-AFFORDABLE HOUSING | Yes | Yes | No | Passed 44–14 |
| May 29, 2026 | HB 4758: JOB APPLICATION-DRIVER LICENSE | Yes | Yes | No | Passed 41–15 |
| May 29, 2026 | HB 4339: SCH CD-HIGH SCH-REGISTER VOTER | Not voting | Yes | No | Passed 41–12 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Walker 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 |
|---|---|---|---|
| 2024 | Illinois State Senate, District 27 | Won | D+15.1 |
| 2022 | Illinois House of Representatives, District 53 | Won | D+14.0 |
| 2020 | Illinois House of Representatives, District 53 | Won | — |
| 2018 | Illinois House of Representatives, District 53 | Won | D+4.9 |
| 2010 | Illinois House of Representatives, District 66 | Lost | R+8.0 |
| 2008 | Illinois House of Representatives, District 66 | Won | D+4.9 |
Source: 99chambers results archive
Seats Walker has held
- Illinois State Senate, District 27 · since 2024
- Illinois House of Representatives, District 53 · 2018–2024
- Illinois House of Representatives, District 66 · 2008–2010
Source: 99chambers results archive
Who Walker has run against
- Tom Schlenhardt (R) · 2024 general, won
- Jack Vrett (R) · 2022 general, won
- Eddie Corrigan (R) · 2018 general, won
- David Harris (R) · 2010 general, lost
- Christine K. Prochno (R) · 2008 general, won
Source: 99chambers results archive
How we know Walker
One person, matched across every source we use.
- Open States ocd-person/d1c2870a-8fee-47bf-a48e-4320311f06fd
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET