Lewis and Clark County, Montana

Montana Senate District 41

2 candidates are tracked for Montana Senate District 41 on the November 3, 2026 ballot: Erin Farris-Olsen and Dru Koester. Candidate information follows official Lewis and Clark County election filings; verify with the official election office linked below.

About this race

Erin Farris-Olsen (Democratic), Dru Koester (Libertarian) are on the November 3, 2026 ballot for Montana Senate District 41. The state's list marks no incumbent for this seat. Party nominees were chosen at the June 2, 2026 primary, per the Montana Secretary of State's 2026 candidate list.

What this office does

State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.

This race. Elected by district: only voters who live in the district see this race on their ballot.

Montana › Lewis and Clark County › Montana Senate District 41

Erin Farris-Olsen

Democratic

Top priorities

Opposes legislation restricting personal decisions about health and family
Supports expanding affordable housing and child care access
Supports public education from early childhood through career training

Per the campaign site.

Biography

Erin is a working mother and nonprofit leader with over 20 years of experience in law, public policy and nonprofit leadership, per the campaign site. She is a longtime resident of the Helena-area Senate District 41, per the campaign site.

Campaign site (opens in a new tab)

Dru Koester

Libertarian

Top priorities

Supports homeschooling
Supports reduced government spending and balanced budgets
Supports gun rights

Per the campaign site.

Biography

Dru describes herself as a blue collar homeschool mom and small business owner who has been married more than 20 years, per a guest column she wrote in the Bozeman Daily Chronicle. She is based in East Helena and is running for Montana Senate District 41 as a Libertarian, per her campaign site.

Campaign site (opens in a new tab)

Next on your ballotMontana Senate District 42

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Voting info and more

Questions about this race

Who is running for Montana Senate District 41 in 2026?

When is the Montana Senate District 41 election in Montana?

Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Montana are on the Montana election hub at theballotbrief.com.

How do I see my exact Lewis and Clark County ballot?

Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.

Verify this race

Candidate roster from official Lewis and Clark County and state election office filings, last verified September 25, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Montana election office, or see the full Lewis and Clark County sample ballot and your exact ballot by address.

The rest of your Lewis and Clark County ballot

15 tracked races in Lewis and Clark County, Montana. Landed here from another county's search? Look up your own ballot below.

Also on your ballot

Montana House District 17 Montana House District 76 Montana House District 79 See all 15 Lewis and Clark County races

Candidate profiles

Erin Farris-Olsen, full profile Dru Koester, full profile Official Montana election office