DemocratIn office since Nov 2020

Mark A Thane

Montana State Representative, District 89 since 2020. Ran in 3 elections between 2020 and 2024, winning 3. Re-elected in 2026. Next on the ballot in 2028.

Montana State Representative, District 89

Official website Wikipedia

In office: 6 yrs; Since 2020
Bills became law: 3; 8 sponsored, 2025–2026 session
Votes missed: 0.1%; Chamber median 0.2%
With party: 95%; On votes splitting the parties
Last margin: +24.1; Won 2026
Next election: 2028; Nov 7, 2028

Source: Wikidata, congress-legislators and Open States; 99chambers legislative recordsUpdated Oct 27, 2026, 1:51 PM ET

Committees

As of 2026-10.

Taxation · vice chair
Agriculture
Education
Revenue Interim
Rules
Rules

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

Legislation

2025–2026 session · 8 sponsored · 3 became law

BillIntroCmteHouseSenateLaw

HB 18 Deposit non-levy revenue in school equalization and property tax relief account
Education - School Finance · Became law Apr 2025

HB 91 Allow taxpayers to elect to receive electronic correspondence from the department of revenue
Rule Making · Became law Apr 2025

HB 17 Revise terms for forest lands taxation advisory committee
Forests and Forestry · Became law Feb 2025

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

Voting record

2025–2026 session · placement by roll-call votes

Where Thane sits in the Montana House of Representatives

Thane is closer to the center than 52% of the chamber's Democrats.

Closest: Denise Joy, Luke Muszkiewicz, Peter Strand

Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:55 PM ET

With Thane’s party

Votes with the chamber's Democrats95%

Black tick: the average of Democrats in the Montana House of Representatives.

Source: 99chambers legislative scores from roll calls and cosponsorships

Key votes

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

Date	Bill	Thane	Dem. majority	Rep. majority	Result
Apr 28, 2025	SB 118: Generally revise student data laws to enhance privacy	No	No	Yes	Failed 33–67
Apr 25, 2025	SB 151: Direct the director of the public defender's office to create units for family defense and…	Yes	Yes	No	Failed 49–50
Apr 25, 2025	SB 321: Provide tax credits for children and child care	Yes	Yes	No	Failed 46–53
Apr 24, 2025	SB 322: Increase business equipment tax exemption	No	No	Yes	Failed 48–52

Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls

Career

Offices held, and every time Thane was on a ballot. Filled marks are general elections won; hollow marks are primaries; an orange outline is a loss.

202020212022202320242025202620272028Montana House of Representatives, District 99 Montana House of Representatives, District 89

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	Montana House of Representatives, District 89	Won	D+24.1	D+5.6	+18.5
2024	Montana House of Representatives, District 89	Won	D+11.2	D+5.6	+5.6
2022	Montana House of Representatives, District 99	Won	D+32.0	D+20.4	+11.6
2020	Montana House of Representatives, District 99	Won	D+28.7	D+11.7	+17.0