Twin Falls County, Idaho

Idaho Senate District 25

2 candidates are tracked for Idaho Senate District 25 on the November 3, 2026 ballot: W. Lane Startin and Casey Swensen. Candidate information follows official Twin Falls County election filings; verify with the official election office linked below.

About this race

W. Lane Startin (D), Casey Swensen (R) are on the November 3, 2026 ballot for Idaho Senate District 25. The Idaho Legislature's membership roster shows no sitting member among these candidates. Party nominees were chosen at the May 19, 2026 primary, per the Idaho Secretary of State's candidate filing portal.

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.

Idaho › Twin Falls County › Idaho Senate District 25

W. Lane Startin

Democrat

Biography

W. Lane Startin is a Democratic candidate for Idaho Senate District 25, per his campaign site. The site did not list further biographical details as of September 27, 2026.

Campaign site (opens in a new tab)

Casey Swensen

Republican

Biography

Casey is a former prosecutor who grew up in Twin Falls working at his family's business, Swensen's Market, and later owned a pest control company in the Midwest before returning to Twin Falls to raise his children, per KIVI-TV. No campaign website was found as of September 18, 2026.

Next on your ballotIdaho House District 24 Seat A

See your full ballot

Voting info and more

Questions about this race

Who is running for Idaho Senate District 25 in 2026?

When is the Idaho Senate District 25 election in Idaho?

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

How do I see my exact Twin Falls 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 Twin Falls County and state election office filings, last verified September 25, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Idaho election office, or see the full Twin Falls County sample ballot and your exact ballot by address.

The rest of your Twin Falls County ballot

12 tracked races in Twin Falls County, Idaho. Landed here from another county's search? Look up your own ballot below.

Also on your ballot

Idaho House District 25 Seat A Idaho House District 24 Seat B Idaho House District 25 Seat B See all 12 Twin Falls County races

Candidate profiles

W. Lane Startin, full profile Casey Swensen, full profile Official Idaho election office