CalledUnofficial results
Montana Senate District 41
Montana State Senate · Montana
Erin Farris-Olsen held the seat for Democrats, winning by 31.0 points over Dru Koester.
Staggered Senate
Erin Farris-OlsenDemocrat · winner
65.5%5,963
Dru KoesterLibertarian
34.5%3,139
9,102 votes
Source: Montana Secretary of State unofficial resultsUpdated Nov 7, 2026, 1:22 PM ET
Money in this race
Each line compares the two campaigns on one scale.
Erin Farris-OlsenNo Republican
$41.4K
Raised by the campaign
—
$11.4K
Spent by the campaign
—
Other candidates' campaigns: Dru Koester $2.5K.
Campaign money: Montana Commissioner of Political Practices, through Oct 25, 2026.
Source: Montana Commissioner of Political Practices campaign filingsUpdated Oct 25, 2026
Pre-election forecast (final, Nov 3)
Our model's last run before Election Day, Nov 3, 2026. It no longer updates.
No Republican was on the ballot, so the model gave the seat to Erin Farris-Olsen without simulating it.
How the forecast works →