Erin Farris-Olsen
Won the 2026 race for Montana Senate District 41.
- Last margin
- +31.0
- Won 2026
Source: Wikidata, congress-legislators and Open States; 99chambers legislative records
Background
As listed by the official candidate list, Wikidata and campaign filings. 99chambers does not summarize platforms or endorsements.
- On the ballot as
- consultant and nominee for the Clerk of the Montana Supreme Court in 2024
Every race Farris-Olsen has run
Baseline: how the seat voted for president in the same or nearest year. Running ahead of it means Farris-Olsen won voters the party’s presidential nominee did not; primaries have no baseline.
| Year | Office | Stage | Result | Opponents | Share | Margin | Raised | Baseline | Against baseline |
|---|---|---|---|---|---|---|---|---|---|
| 2026 | Montana Senate District 41 | General | Won | Dru Koester (L) | 65.5% | D+31.0 | $41.4K | D+6.8 |
Source: 99chambers results archive; 2026: Montana Secretary of State (unofficial)Updated Nov 8, 2026, 7:01 PM ET
Money
Farris-Olsen’s campaign fundraising.
- Raised, 2025–26
- $41.4K
Source: Montana Commissioner of Political Practices filings through Oct 25, 2026Updated Nov 1, 2026, 9:16 AM ET
What’s next
From campaign filings, not from public statements.
| Farris-Olsen, Erin State | Active |
Source: Montana Commissioner of Political Practices filings through Oct 25, 2026Updated Nov 1, 2026, 9:16 AM ET
Who Farris-Olsen has run against
- Dru Koester (L) · 2026 general, won
Source: 99chambers results archive; 2026: Montana Secretary of State (unofficial)
The seat
- Montana Senate District 41 · lean D+5.6 · 14th most Democratic of 50
Source: 99chambers: presidential results on current lines (MEDSL precinct returns)