Leaving office January 1, 2027.Lost re-election in 2026. This page switches to the former-officeholder layout when the term ends.

DemocratIn office until January 1, 2027

Mike Zimmer

Iowa State Senator, District 35 since 2025. Lost re-election in 2026; leaves office in January 2027. Ran in 1 election in 2025, winning 1.

Iowa State Senator, District 35Educator

Official website Wikipedia

In office: 1 yr; Since 2025
Bills became law: 0; 53 sponsored, 2025–2026 session
Votes missed: 2.0%; Chamber median 2.9%
With party: 85%; On votes splitting the parties
Last margin: −3.8; Lost 2026
Elections: 2; 2025–2026

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:52 PM ET

Committees

As of 2026-10.

Agriculture · ranking member
Education
Health and Human Services
Natural Resources and Environment
Transportation

Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET

Legislation

2025–2026 session · 53 sponsored · 0 became law

BillIntroCmteSenateHouseLaw

SF 2360 A bill for an act relating to partial payments of property taxes and including applicability provisions.
county government · Failed in committee Feb 2026

SF 2241 A bill for an act relating to charter school requirements, including reporting requirements, governance…
boards, commissions, and councils · Failed in committee Feb 2026

SF 2244 A bill for an act relating to the education savings account program, including the establishment and…
contracts · Failed in committee Feb 2026

SF 2245 A bill for an act relating to audits of governmental subdivisions by the state auditor concerning suspected…
accountancy · Failed in committee Feb 2026

SF 2243 A bill for an act relating to the operation of state government, including the commencement of audits,…
auditor of state · Failed in committee Feb 2026

Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET

Voting record

2025–2026 session · placement by roll-call votes

Where Zimmer sits in the Iowa State Senate

Zimmer is closer to the center than 83% of the chamber's Democrats.

Closest: Zach Wahls, Izaah Knox, Matt Blake

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:49 PM ET

With Zimmer’s party

Votes with the chamber's Democrats85%

Black tick: the average of Democrats in the Iowa State Senate.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

Votes chosen for their effect, not their side: Zimmer’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.

Date	Bill	Zimmer	Dem. majority	Rep. majority	Result
Oct 2, 2026	HF 2801: A bill for an act modifying the major economic growth attraction program, and including…	Yes	No	Yes	Passed 28–19
May 2, 2026	HF 2770: A bill for an act relating to and making appropriations to the justice system, providing…	Yes	No	Yes	Passed 29–17
May 2, 2026	HF 2787: A bill for an act prohibiting warrant resolution clinics, including enforcement…	Yes	No	Yes	Passed 31–12
May 2, 2026	SF 2490: A bill for an act relating to oil and gas production, including filing requirements, the…	No	No	Yes	Passed 35–11
May 2, 2026	HF 2781: A bill for an act relating to allocations of moneys from the juvenile detention home fund.	Yes	No	Yes	Passed 34–9