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Voting in Idaho
Idaho will hold its 2026 primary elections on May 19. The general election will be held on November 3.
When to Vote
Dates you shouldn’t miss.
Primary Election Dates
All primary elections in Idaho are partially closed.
Each political party may decide whether voters who are not affiliated with their party can vote in the primary election or not.
In 2026, the Republican party will be holding closed primaries, meaning only registered Republicans may participate. The Democratic party will be holding primaries that are open to Democratic voters as well as voters who are unaffiliated with any political party.
May 19, 2026
Primary election day
May 19, 2026
Voter registration deadline — in person
May 8, 2026
Voter registration deadline — online
May 8, 2026
Voter registration deadline — by mail
May 8, 2026
Vote by mail request deadline (by mail)
May 8, 2026
Vote by mail request deadline (in person)
May 20, 2026
Ballot return deadline (must be received)
Apr 27, 2026–May 15, 2026
Early voting
General Election Dates
Plan to Vote
Make a plan to vote
How to Vote
How to vote in Idaho
Early Voting
Vote by Mail
Voter ID
Voting FAQs
Can I check to see if I’m registered to vote?
How long does it take to process my voter registration?
How frequently are elections held?
How can I track my absentee ballot status?
Can I register to vote at my student address?
Can I vote without an address?
Can a US citizen without a US address who is living abroad register to vote?
I think my voting rights have been denied. What do I do?