Idaho US Senate 2026
Election day is November 3, 2026. A statewide contest in Idaho.
Who is favoured in Idaho US Senate?
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What the Idaho US Senate election decides
The Senate confirms federal judges and cabinet officers, ratifies treaties, and can stop legislation the House passes. With a six-year term and a hundred-member chamber, a single seat is a larger share of the institution than any House district, which is why Senate races draw national money into state contests.
Each state sends two senators regardless of population, so this seat carries the same weight as California's or Wyoming's. Idaho voters fill it alongside all 2 of the state's House seats and the governorship, and a Senate term runs six years, spanning two future Congresses and, in this case, the next presidential election.
How Idaho votes
Idaho pairs one of the country's fastest-growing metros in Boise with vast agricultural and mountain counties. It is a strongly Republican state where the decisive contests are usually primaries, and growth itself has become a defining issue. That backdrop is the ground any Idaho campaign fights on, and it is what the Electorate HQ simulation reads first when it weighs a ticket's platform against this contest.
About this race
The 2026 United States Senate election in Idaho was an election held on November 3, 2026, to elect a member of the United States Senate to represent the state of Idaho. Republican incumbent Jim Risch was re-elected a fourth term, defeating independent former state representative Todd Achilles and independent software developer Natalie Fleming.
Primary elections were held on May 19. Risch won the Republican nomination with 67.3% of the vote, facing minimal opposition. The Democratic nomination was won by realtor David Roth, who was the nominee in 2022, but after Achilles entered the race in July with the support of Democratic leaders, Roth withdrew near the end of the month.
Background
Latest coverage of the Idaho US Senate race
Risch campaign says rumors of using 1917 Idaho law to avoid Senate election are ‘completely false’Idaho 2026 U.S. Senate Race CandidatesIdaho U.S. Senate Election 2026: Latest PollsLeague of Women Voters of Idaho announces candidate forums for state's governor, US Senate racesDemocrats gain six seats in Idaho LegislatureIdaho: And The Winner Is2026 results: Abortion initiative fails; Idaho GOP’s Risch, Little reelected; HJR 4 rejectedIdaho Republican US Sen. Jim Risch retains seat against independent challenger Todd AchillesThe rest of the Idaho ballot
Every Idaho House district, the counties inside each one, and an address lookup that resolves your exact districts are on the Idaho state page.
Other 2026 races in Idaho
Analysis covering Idaho
Twenty-six states elect a senator and a governor on the same day in 2026
The overlap between the Senate class and the gubernatorial cohort is a coincidence of two unrelated calendars, and it decides where money goes.
The 2026 Senate map covers 62% of the country and 70% of the states
Thirty-five of fifty states vote for Senate this year. Weighted by people rather than states the share drops, and that gap is the design of the chamber.