Jeff Irwin
Michigan State Senator, District 15 since 2018. Did not run for re-election in 2026; leaves office in January 2027.
- In office
- 7 yrs
- Since 2018
- Bills became law
- 4
- 59 sponsored, 2025–2026 session
- Votes missed
- 0.2%
- Chamber median 1.5%
- With party
- 96%
- On votes splitting the parties
- Last margin
- +48.3
- Won 2022
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 9:43 AM ET
Committees
As of 2026-10.
- Finance, Insurance and Consumer Protection · democratic vice chair
- Housing and Human Services · chair
- Appropriations
- Civil Rights, Judiciary and Public Safety
- Education
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Children: children's rights · Became law Jul 2026
Insurance: dental care corporations · Became law Jul 2026
Probate: guardians and conservators · Became law Jul 2026
Corporate income tax: credits · Became law Jul 2026
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Irwin sits in the Michigan State Senate
Irwin is closer to the center than 45% of the chamber's Democrats.
Closest: Sean McCann, Paul Wojno, Winnie Brinks
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:53 PM ET
With Irwin’s party
- Votes with the chamber's Democrats96%
- Cosponsorships of the other party's bills13%
Black tick: the average of Democrats in the Michigan State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Irwin’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Irwin | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Sep 9, 2026 | HB 5482: State agencies (existing): generally; plans to correct audit recommendations; require… | Yes | Yes | No | Passed 24–10 |
| Sep 9, 2026 | SB 729: State finance: authorities; outstanding obligations of the state building authority;… | Yes | Yes | No | Passed 24–10 |
| Jul 3, 2026 | SB 1052: Human services: medical services; definition of kickbacks or bribes; modify. Amends sec.… | Yes | Yes | No | Passed 22–14 |
| Jul 3, 2026 | SB 569: Health: funding; various fees under the public health code; transfer and deposit into the… | Yes | Yes | No | Passed 21–15 |
| Jul 3, 2026 | HB 5630: Appropriations: school aid omnibus; fiscal year 2026-2027 appropriations for K-12 school… | Yes | Yes | No | Passed 25–11 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Irwin 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 |
|---|---|---|---|
| 2022 | Michigan State Senate, District 15 | Won | D+48.3 |
| 2018 | Michigan State Senate, District 18 | Won | D+55.6 |
| 2014 | Michigan House of Representatives, District 53 | Won | D+64.7 |
| 2012 | Michigan House of Representatives, District 53 | Won | D+61.9 |
| 2010 | Michigan House of Representatives, District 53 | Won | D+60.9 |
Source: 99chambers results archive
Seats Irwin has held
- Michigan State Senate, District 15 · since 2022
- Michigan State Senate, District 18 · since 2018
- Michigan House of Representatives, District 53 · 2010–2016
Source: 99chambers results archive
Who Irwin has run against
- Scott Price (R) · 2022 general, won
- Martin Church (R) · 2018 general, won
- John Spisak (R) · 2014 general, won
- John Spisak (R) · 2012 general, won
- Chase Ingersoll (R) · 2010 general, won
Source: 99chambers results archive
How we know Irwin
One person, matched across every source we use.
- Open States ocd-person/a1c1163d-af8d-4b88-9365-07717d4a45c3
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 9:43 AM ET