Idaho Primary Election (verify date at your state's Secretary of State website)
Monday, June 1, 2026 · 10 days away
U.S. House, U.S. Senate, Governor, statewide offices
What’s being decided
A primary election determines which candidates advance to the November general election. Voters in each party select their nominee, and the winners face each other in the fall.
Idaho holds an closed primary — only voters registered with a party may vote in that party's primary.
Candidates
U.S. Senate
Republican · Incumbent since 1999
Mike Crapo has represented Idaho in the U.S. Senate since 1999. He chairs the Senate Finance Committee, one of the most influential committees in Congress, which has jurisdiction over taxes, trade, Social Security, Medicare, and Medicaid. He is one of the Senate's most senior members and a consistent conservative voice on fiscal policy.
Voter information
Registration deadline
Register through Election Day
You can register and vote on Election Day at your polling place.