One candidate is tracked for Idaho Senate District 21 on the November 3, 2026 ballot: Treg A. Bernt. Candidate information follows official Ada County election filings; verify with the official election office linked below.
Treg A. Bernt (R) is the only candidate on the November 3, 2026 ballot for Idaho Senate District 21; unopposed candidates still appear on Idaho ballots, so the race is on the ballot but is not contested. Treg A. Bernt is the sitting member, per the Idaho Legislature's membership roster. Party nominees were chosen at the May 19, 2026 primary, per the Idaho Secretary of State's candidate filing portal.
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. The sitting officeholder, Treg A. Bernt, is on the ballot. One name is on the ballot for this seat.
Idaho › Ada County › Idaho Senate District 21
R Incumbent
Per the campaign site.
Treg is a Meridian business owner serving his second term in the Idaho Senate representing District 21, per the Idaho Legislature. He previously served in the Idaho House from 2020 to 2022, per the Idaho Legislature.
Who is running for Idaho Senate District 21 in 2026?
One candidate is tracked for Idaho Senate District 21 on the November 3, 2026 ballot: Treg A. Bernt. Candidate information follows official Ada County election filings; verify with the official election office linked below.
When is the Idaho Senate District 21 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 Ada 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.
Candidate roster from official Ada County and state election office filings, last verified September 27, 2026. Bios and priorities carry their attribution inline.
Cross-check with the official Idaho election office, or see the full Ada County sample ballot and your exact ballot by address.
39 tracked races in Ada County, Idaho. Landed here from another county's search? Look up your own ballot below.