Mike Gierau
Wyoming State Senator, District 17 since 2018. Ran in 5 elections between 1992 and 2022, winning 3. Re-elected in 2026. Next on the ballot in 2030.
Wyoming State Senator, District 17Born 1959
- In office
- 7 yrs
- Since 2018
- Bills became law
- 1
- 2 sponsored, 2025–2026 session
- Votes missed
- 1.7%
- Chamber median 1.4%
- With party
- 100%
- On votes splitting the parties
- Last margin
- +30.9
- Won 2022
- Next election
- 2030
- Nov 5, 2030
Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET
Committees
As of 2026-10.
- Air Transportation Liaison
- Appropriations
- Capital Financing and Investments Select
- Journal
- Management Council
- Rules and Procedure
- Water Select
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 Gierau sits in the Wyoming State Senate
Gierau is closer to the center than 50% of the chamber's Democrats.
Closest: Cale Case, Jim Anderson, Chris Rothfuss
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 5:10 PM ET
With Gierau’s party
- Votes with the chamber's Democrats100%
- Cosponsorships of the other party's bills74%
Black tick: the average of Democrats in the Wyoming State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Gierau’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Gierau | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Mar 11, 2026 | SF 119: Strategic investments and projects account-repeal-2. | Yes | Yes | Yes | Passed 20–10 |
| Mar 11, 2026 | SF 101: Second amendment protection act amendments-3. | Yes | Yes | No | Failed 12–18 |
| Mar 7, 2026 | SF 1: General government appropriations. | Yes | Yes | Yes | Passed 24–5 |
| Mar 6, 2025 | HB 36: Hathaway scholarship-amendments. | No | No | Yes | Passed 23–8 |
| Mar 6, 2025 | HB 94: Charter school authorizations-amendments. | No | No | Yes | Passed 21–10 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Gierau 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 | Seat | +/− |
|---|---|---|---|---|---|
| 2026 | Wyoming State Senate, District 17 | Won | — | D+37.2 | — |
| 2022 | Wyoming State Senate, District 17 | Won | D+30.9 | D+37.7 | −6.8 |
| 2018 | Wyoming State Senate, District 17 | Won | D+24.6 | — | — |
| 2016 | Wyoming House of Representatives, District 16 | Won | — | — | — |
| 2004 | Wyoming House of Representatives, District 23 | Lost | R+3.6 | — | — |
| 1992 | Wyoming State Senate, District 17 | Lost | R+11.9 | — | — |
Source: 99chambers results archive; 2026: civicAPI (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Seats Gierau has held
- Wyoming State Senate, District 17 · since 2018
- Wyoming House of Representatives, District 16 · 2016–2018
Source: 99chambers results archive
Who Gierau has run against
- Steve Duerr (R) · 2022 election, won
- Kate Mead (R) · 2018 election, won
- Keith Gingery (R) · 2004 election, lost
- Robert F. Lalonde (R) · 1992 election, lost
Source: 99chambers results archive; 2026: civicAPI (unofficial)
How we know Gierau
One person, matched across every source we use.
- Open States ocd-person/587874e4-f0c9-4679-aa08-a2442b7d33b1
- Wikidata Q27830771
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:51 PM ET