Staggered Senate
Senators serve four-year terms; half the seats are on the ballot each election.
Montana › Montana State Senate · November 3, 2026 · Updated Oct 16, 2026
Montana State Senate District 41
Erin Farris-Olsen has no major-party opponent.
Erin Farris-Olsen has no major-party opponent.
How this race is decided
The candidates
Democratic
Erin Farris-Olsen
Consultant and nominee for the Clerk of the Montana Supreme Court in 2024
- Experience
- No elected office
Libertarian
Dru Koester
Businessowner
- Experience
- No elected office
The district
Lean D+6: how much more Democratic or Republican than the nation it votes for president.
Presidential vote
Precinct results re-aggregated to the current district lines.
Who lives here
- Population
- 10,994
- People per km²
- 98
- Adults with a B.A.+
- 35%
- White, no degree
- 57%of adults
- White 87%
- Hispanic 4%
- Black 1%
- Asian 1%
- Other / multiracial 8%
American Community Survey 2020–2024, aggregated from census tracts.
Past results
Results in the same-numbered district; earlier elections may have used different lines.
2024 President Vote in this district
11,635 two-party votes · D+6.8 · D+8.3 vs. the nation✓ Kamala Harris (D)53.4%
Donald Trump (R)46.6%
2022 Earlier district lines
9,795 votes · D+10.7✓ Janet Ellis (D)55.4%
Dave Galt (R)44.6%
2020 President Vote in this district
12,437 two-party votes · D+2.3 · R+2.2 vs. the nation✓ Joe Biden (D)51.2%
Donald Trump (R)48.8%
2018 Earlier district lines
10,501 votes · D+15.5✓ Janet Ellis (D)57.8%
John Schmidt (R)42.2%
2016 President Vote in this district
9,762 two-party votes · R+2.5 · R+4.8 vs. the nation✓ Donald Trump (R)51.3%
Hillary Clinton (D)48.7%
2014 Earlier district lines
5,888 votes · Uncontested by the other party✓ Mary M Caferro (D)100.0%