Rob Martwick
Illinois State Senator, District 10 since 2020. Next on the ballot in 2028.
- In office
- 6 yrs
- Since 2020
- Bills became law
- 18
- 106 sponsored, 2025–2026 session
- Votes missed
- 7.9%
- Chamber median 2.8%
- With party
- 100%
- On votes splitting the parties
- Last margin
- +21.8
- Won 2024
- Next election
- 2028
- Nov 7, 2028
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Judiciary · vice chair
- Pensions · chair
- Criminal Law
- Financial Institutions
- Labor
- Revenue
- State Government
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 Martwick sits in the Illinois State Senate
Martwick is closer to the center than 5% of the chamber's Democrats.
Closest: Celina Villanueva, Elgie Sims, Ram Villivalam
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:50 PM ET
With Martwick’s party
- Votes with the chamber's Democrats100%
- Cosponsorships of the other party's bills8%
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: Martwick’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Martwick | 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 | Yes | Yes | No | Passed 41–12 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Martwick 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 10 | Won | D+21.8 |
| 2022 | Illinois State Senate, District 10 | Won | — |
| 2020 | Illinois State Senate, District 10 | Won | D+7.6 |
| 2018 | Illinois House of Representatives, District 19 | Won | D+21.4 |
| 2016 | Illinois House of Representatives, District 19 | Won | — |
| 2014 | Illinois House of Representatives, District 19 | Won | — |
| 2012 | Illinois House of Representatives, District 19 | Won | — |
Source: 99chambers results archive
Seats Martwick has held
- Illinois State Senate, District 10 · since 2020
- Illinois House of Representatives, District 19 · 2012–2020
Source: 99chambers results archive
Who Martwick has run against
- Jon Luers (R) · 2024 general, won
- Anthony Beckman (R) · 2020 general, won
- Ammie Kessem (R) · 2018 general, won
Source: 99chambers results archive
How we know Martwick
One person, matched across every source we use.
- Open States ocd-person/4a3645fe-2a56-400f-ae2a-18e50f2b0bea
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET