Michigan Senate · District 15

Jeff Irwin

Democratic

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Votes with the Senate Majority Leader 94% On 362 contested votes where both voted · 95% on all votes Votes with own party 97% Partisan rank: 21 of 38 in the Senate (tied with 3 others) Didn't vote at roll call 0.2% 1 of 631 roll calls

Bills passed 4 57 sponsored · 4 became law · Rank 6 of 38 in the Senate (tied with 1 other) Bills that became law 4 of 4 passed · 0 vetoed

Where they sit

Every current senator, placed from most liberal to most conservative by how they voted on contested bills.

How these numbers work →

← Most liberalThe aisleMost conservative →

Votes with DemocratsCrosses party linesVotes with Republicans

Jeff Irwin's seat is marked. Seats run from most liberal (left) to most conservative (right), by contested floor votes. Color shows how often each member crosses party lines toward the middle on votes that divide the parties: solid blue or red means almost never, and purple means on at least 1 in 5 of those votes. Gray seats are members too new to score. How these numbers work

Michigan Senate22ndpercentile

More liberal than 78% of the Michigan Senate.

Most liberalMost conservative

9th most liberal of 38

The scores

How these numbers work →

Votes with the Senate Majority Leader

94%

Each tick is a current senator, by party; the dot is Jeff Irwin.

On 362 contested votes where both voted95% on all 630 votes where both voted

Votes with own party

97%

Each tick is a current senator, by party; the dot is Jeff Irwin.

On 288 party-line votesPartisan rank: 21 of 38 in the Senate (tied with 3 others)20 senators vote with their party more often

Bills

The bills Jeff Irwin sponsored this term and how far they got. Co-sponsors aren’t counted.

How these numbers work →

Bills: Jeff Irwin
	Bills
Sponsored	57
Passed both chambers	4
Became law	4
Vetoed by the Governor	0

Rank by bills passed: Rank 6 of 38 in the Senate (tied with 1 other) · 6 of 20 Democrats (tied with 1 other)

A bill's sponsor is its primary sponsor, the first name on it; co-sponsors aren't counted.

Bills that passed both chambers

Bills that passed both chambers: Jeff Irwin
Bill	Result	Final action
SB 966 Housing: housing development authority; housing opportunity tax credit program; establish and administer	Became law	July 3, 2026
SB 585 Probate: guardians and conservators; requirement to have an appraisal for the sale of real property; provide for	Became law	July 3, 2026
SB 18 Children: foster care; conditions on the use of certain benefits for a child in foster care; provide	Became law	July 3, 2026
SB 105 Insurance: health insurers; methods of payments and reimbursements for dental benefits; provide for	Became law	July 3, 2026

Budget projects

The Michigan pages don't credit legislators with budget items.

Contested votes where they split

22 against the Senate Majority Leader; 20 against most of their party.

Contested votes where they split: Jeff Irwin
Date	Bill and motion	Their vote	Senate Majority Leader	Most of their party
July 3, 2026	HB 6074: Property: land sales; purchase of residential property by certain businesses; prohibit Passage	Nay	Yea (split)	Yea (split)
July 3, 2026	HB 4187: Individual income tax: revenue distributions; distribution and use of renew Michigan fund and lapse of interest and earnings from the revitalization and… Passage	Nay	Yea (split)	Yea (split)
July 3, 2026	HB 4471: Retirement: county employees; employment of retirant in a county sheriff's office; allow without forfeiting retirement allowance Passage	Nay	Yea (split)	Yea (split)
April 30, 2026	SB 877: Appropriations: supplemental; appropriations for multiple departments and branches for fiscal year 2025-2026; provide for Amendment	Nay	Yea (split)	Yea (split)
Dec. 16, 2025	HB 4543: Individual income tax: home heating credit; adjustments based on Detroit Consumer Price Index; change to United States Consumer Price Index Passage	Nay	Yea (split)	Yea (split)
Dec. 9, 2025	SB 723: Economic development: brownfield redevelopment authority; transformational brownfield plan; modify Passage	Nay	Yea (split)	Yea (split)
Dec. 9, 2025	SB 722: Economic development: commercial redevelopment; commercial rehabilitation act; modify Passage	Nay	Yea (split)	Yea (split)
Dec. 9, 2025	SB 721: Economic development: commercial redevelopment; commercial redevelopment act; modify Passage	Nay	Yea (split)	Yea (split)
Nov. 13, 2025	HB 5055: Law enforcement: other; jurisdiction of sergeant at arms; modify Passage	Nay	Yea (split)	Yea (split)
Oct. 21, 2025	SB 596: State finance: budgets; legislatively directed spending items; create a request and monitoring process for Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4183: Transportation: motor fuel tax; motor fuel tax; increase and expand applicability Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4182: Use tax: exemptions; motor fuel sales; exempt Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4181: Streamline sales and use tax: exemptions; tax on motor fuel; exclude Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4180: Sales tax: exemptions; motor fuel sales; exempt Passage	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	SB 578: Highways: bridges; movable bridge fund; modify and create neighborhood roads fund Concurrence in House Amendments	Nay	Yea (split)	Yea (split)
Oct. 3, 2025	HB 4951: Marihuana: taxation; comprehensive road funding act; create Passage	Nay	Yea (split)	Yea (split)
Sept. 4, 2025	SB 396: Environmental protection: air pollution; regulation of carbon sequestration; provide for Passage	Nay	Yea (split)	Yea (split)
Sept. 4, 2025	SB 395: Natural resources: gas and oil; definitions in the crude oil and petroleum act; update Passage	Nay	Yea (split)	Yea (split)
Sept. 4, 2025	SB 394: Natural resources: gas and oil; ownership and conveyance rights associated with pore space; establish Passage	Nay	Yea (split)	Yea (split)
June 17, 2025	SB 424: Criminal procedure: sex offender registration; sex offender registration act; modify Passage	Nay	Yea (split)	Yea (split)
Feb. 20, 2025	HB 4002: Labor: benefits; requirements for an employer to provide earned sick time, modify Passage	Nay	Yea (split)	Nay
Feb. 13, 2025	SB 8: Labor: hours and wages; minimum hourly wage rate; modify Passage	Nay	Yea (split)	Nay

Every roll call

How Jeff Irwin voted on each of the 631 floor roll calls while in office, newest first.

Every roll call: Jeff Irwin
Date	Vote	Their vote	Most of their party	Senate Majority Leader	Yeas–nays
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Contested and party-line votes link to their own pages; the rest link to the official record.

Contact, committees and caucuses

Contact

Email: senjirwin@senate.michigan.gov
Capitol office: Room 5100, Binsfeld Building P.O. Box 30036, Lansing, MI 48909
517-373-2406

Committees

Housing and Human Services Chair
Finance, Insurance and Consumer Protection Democratic vice chair
Appropriations
Civil Rights, Judiciary and Public Safety
Education

Contact details and committee assignments from Open States' data on the Michigan Legislature, which it collects from the chambers' websites, as of Oct. 15, 2026.

Source: the Michigan House and Senate Journals, Jan. 8, 2025 to Oct. 14, 2026. How these numbers work · Corrections