Andrea Olsen
Montana State Senator, District 48 since 2022. Re-elected in 2026. Next on the ballot in 2030.
Montana State Senator, District 48Born 1961
- In office
- 3 yrs
- Since 2022
- Bills became law
- 0
- 13 sponsored, 2025–2026 session
- Votes missed
- 1.0%
- Chamber median 0.5%
- With party
- 96%
- On votes splitting the parties
- Last margin
- +45.3
- 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.
- Judiciary · vice chair
- Education and Cultural Resources
- Highways and Transportation
- Legislative Consumer
- Transportation Interim
Source: Open States committeesUpdated Oct 27, 2026, 9:43 AM ET
Legislation
Guns and Weapons · Failed in committee May 2025
Insurance · Failed in committee May 2025
Environmental Protection · Failed in committee May 2025
Rule Making · Failed in committee May 2025
Health · Failed in committee May 2025
Source: Open States billsUpdated Nov 6, 2026, 4:22 PM ET
Voting record
Where Olsen sits in the Montana State Senate
Olsen is closer to the center than 0% of the chamber's Democrats.
Closest: Mary Ann Dunwell, Jacinda Morigeau, Susan Webber
Source: 99chambers roll-call scalingUpdated Nov 6, 2026, 4:55 PM ET
With Olsen’s party
- Votes with the chamber's Democrats96%
Black tick: the average of Democrats in the Montana State Senate.
Source: 99chambers legislative scores from roll calls and cosponsorships
Key votes
Votes chosen for their effect, not their side: Olsen’s vote, each party’s majority, and the result. An orange vote differs from most Democrats.
| Date | Bill | Olsen | Dem. majority | Rep. majority | Result |
|---|---|---|---|---|---|
| Apr 23, 2025 | HB 860: Provide for veterinary training loan program | Yes | Yes | Yes | Passed 41–9 |
| Apr 23, 2025 | HB 129: Provide income tax benefit to support emergency response volunteers | Yes | Yes | No | Passed 28–22 |
| Apr 23, 2025 | HB 853: Revise fees for licensed establishments | Yes | Yes | No | Passed 29–21 |
Source: 99chambers key votes from Congress.gov, Voteview and Open States roll calls
Career
Offices held, and every time Olsen 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 | Montana Senate District 48 | Won | — | D+42.1 | — |
| 2022 | Montana State Senate, District 50 | Won | D+45.3 | — | — |
| 2020 | Montana House of Representatives, District 100 | Won | D+64.7 | — | — |
| 2018 | Montana House of Representatives, District 100 | Won | — | — | — |
| 2016 | Montana House of Representatives, District 100 | Won | D+58.5 | — | — |
| 2014 | Montana House of Representatives, District 100 | Won | — | — | — |
| 2014 | Montana House of Representatives, District 100 (primary) | Won | +46.7 | — | — |
Source: 99chambers results archive; 2026: Montana Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Campaign money, 2025–26
- Raised
- $16.3K
- Spent
- $10.2K
Source: Montana Commissioner of Political Practices filings through Oct 25, 2026Updated Nov 1, 2026, 9:16 AM ET
Campaign committees
Open committees can still raise and spend money.
| Olsen, Andrea State | Active |
Source: Montana Commissioner of Political Practices filings through Oct 25, 2026Updated Nov 1, 2026, 9:16 AM ET
Seats Olsen has held
- Montana State Senate, District 50 · since 2022
- Montana House of Representatives, District 100 · 2014–2022
Source: 99chambers results archive
Who Olsen has run against
- Nick Knowles (R) · 2022 election, won
- Carol Minjares (R) · 2020 election, won
- David Moore (R) · 2016 election, won
Source: 99chambers results archive; 2026: Montana Secretary of State (unofficial)
How we know Olsen
One person, matched across every source we use.
- Open States ocd-person/2dcaf4be-0227-4ced-b01c-aacd8376c45a
- Wikidata Q60656217
Source: Identity links: Wikidata, congress-legislators, Open States, FECUpdated Oct 27, 2026, 1:51 PM ET