Pre-18 voter registration in Missouri
In Missouri 80,261 people turn 18 every year.
Missourians can pre-register before turning 18.
pre-register before turning To register to vote in Missouri, you must be: 17 years and 6 months old.
That means all 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 Missouri
Upcoming Statewide or Federal Elections:
- Aug 4th, 2026 - Missouri Primary Election (Register by Jul 8th, 2026)
- Nov 3rd, 2026 - Missouri General Election (Register by Oct 7th, 2026)
Useful Links:
- Registration Form - Download the paper registration form for Missouri.
- 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 Missouri.
- 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 Missouri, you must provide your Missouri driver’s license number AND the last four digits of your Social Security number, if you have been issued them.
If you do not have one or both of these ID numbers, indicate this on the form. Missouri will assign you a unique identification number.
By Mail: Eligibility Requirements
To register in Missouri you must:
be a United States citizen
be a resident of Missouri
be at least 17-1/2 years of age (you must be 18 to vote)
not be on probation or parole after conviction of a felony, until finally discharged from such probation or parole
not be convicted of a felony or misdemeanor connected with the right of suffrage
not be adjudged incapacitated by any court of law
not be confined under a sentence of imprisonment
By Mail: New Voter Instructions
If you are registering to vote for the first time in your jurisdiction 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 National Voter Registration Form.
Online Instructions
Missouri requires that you use a tablet, mobile device, or other touchscreen device to register online to vote. This is because you will be required to provide a signature during the process.
More information here.
Missouri 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
