Pre-18 voter registration in Idaho
In Idaho 30,726 people turn 18 every year.
Idahoans can pre-register before turning 18.
pre-register before turning To register to vote in Idaho, you must be: 18 by Nov 3rd, 2026. (18 by the next primary or general election).
That means most eligible seniors and many juniors in your high school can register to vote today and vote at 18.
High school students can help one another get ready to vote.
Next Steps!
How to Register to Vote in Idaho
Upcoming Statewide or Federal Elections:
- Nov 3rd, 2026 - Idaho General Election (Register by Oct 23rd, 2026)
Useful Links:
- Registration Form - Download the paper registration form for Idaho.
- Registration Status - Check if you are already registered, your polling place, and more from your state’s voter registration website.
- Fair Elections Center - Learn about conducting a registration drive in Idaho.
- Vote 411 - A nonpartisan resource to help you register, preview your ballot, and find key election information from the League of Women Voters.
- VoteRiders - Find out what forms of ID you can use to register and vote, and get help getting a valid form of ID.
Full Registration Details
By Mail: ID Requirements
To submit a voter registration application by mail in Idaho, you must provide your current Idaho driver's license number OR state ID number, if you have one. If you do not have either of these ID numbers, you must instead provide the last four digits of your Social Security number.
If you have not been issued any of these ID numbers, contact your county elections office to complete your voter registration.
By Mail: Eligibility Requirements
To register in Idaho you must:
be a United States citizen
have resided in Idaho and in the county for 30 days prior to the day of election
be at least 18 years old
not have been convicted of a felony, and without having been restored to the rights of citizenship, or confined in prison on conviction of a criminal offense
By Mail: New Voter Instructions
If you are registering to vote for the first time in your county and submit your registration application by mail, federal law requires you to provide a COPY of proof of identification with your application OR show acceptable documentation when you vote. Acceptable forms of identification include a current and valid photo ID OR a current utility bill, bank statement, government check, paycheck, or government document that shows your name and address. More information about these requirements is available on the Idaho Secretary of State website.
Online Instructions
You need an Idaho ID to use Idaho's online voter registration system. The address on your ID must match your current residence. If you don’t have an Idaho DMV-issued ID with your current address, you can still submit a voter registration application by mail or in person with additional proof of residence documentation.
More information here.
Idaho High School Educators!!!
Support your students’ voter registration effort with our free toolkit.
About this information
This page presents a curated compilation of voting and election information, specifically geared toward high school students, their families, and educators.
Information about deadlines and voting laws is retrieved via the Democracy Works Elections API and was last retrieved on Jul 6th, 2026; the API compiles election guidance from official government sources and other vetted data providers, and details may change over time. Information concerning requirements for high schools is based on The Civics Center’s analysis of State Requirements for High School Voter Registration and was last updated on Jun 22nd, 2026.
Information about youth turning 18 each year is from the U.S. Census, and information on the number of 18-year-olds who have not yet registered is based on applying TCC’s analysis of Census data and state voter files. We also provide links to trusted resources, including VoteRiders (for voter ID information) and Fair Elections Center (for information about laws governing voter registration drives).
These pages are offered for guidance only and are not intended as legal advice. Please consult state election officials or an attorney if you have questions about any particular situation. We hope you find this useful. To cite our resources and original research, please provide links and/or cite The Civics Center.
© 2026 The Civics Center
