2026 voter guide
MO
How to vote in Missouri in 2026
Every deadline, rule, and official link — kept simple. When you're ready, build a personal plan with calendar reminders in about a minute.
Key dates
- State Primary
- Tuesday, August 4, 2026
- General Election
- Tuesday, November 3, 2026
- Register online by
- Wednesday, October 7, 2026
- Register by mail by
- Wednesday, October 7, 2026(postmarked)
- Register in person by
- Wednesday, October 7, 2026
- Request a mail ballot by
- Wednesday, October 21, 2026
Deadlines shown are for the November 3, 2026 general election.
Subscribe to these deadlines
One tap adds every Missouri deadline to your calendar — and when rules change, the dates update on their own. No account, no email.
Register to vote
Online: Received by the fourth Wednesday before Election Day. By mail: Postmarked by the fourth Wednesday prior to Election Day. In person: Received by the fourth Wednesday prior to Election Day before close of business.
Online — the fastest way
A few minutes on the official site.
By mail
Print, sign, and mail the National Mail Voter Registration Form.
In person
At your local election office or DMV.
Already registered? Double-check.
Vote by mail
Missouri requires an approved excuse to vote by mail. Received by 5pm on the second Wednesday prior to Election Day
Returning it: Received by the close of polls on Election Day.
Vote in person
Early voting
OfferedNo-excuse in-person absentee voting runs Tuesday, October 20 through 5:00 p.m. Monday, November 2, 2026.
On Election Day — Tuesday, November 3, 2026 — vote at your assigned polling place or vote center.
On your 2026 ballot
7 statewide measures are certified for Missouri's 2026 ballots so far.
Amendment 1Constitutional amendment · Conservation funding · Aug 4, 2026
This measure would renew Missouri's existing 0.1% sales and use tax for 10 more years to fund state parks and soil and water conservation. The renewal question is referred to voters automatically under the state constitution.
A yes vote means: Renews the 0.1% parks and conservation sales tax for another 10 years.
A no vote means: Does not renew the 0.1% sales tax.
Amendment 2Constitutional amendment · Local elections · Aug 4, 2026
This amendment would require the Jackson County assessor to be an elected position by removing the constitutional exemption that currently allows the county to appoint its assessor.
A yes vote means: Makes the Jackson County assessor an elected office.
A no vote means: Keeps the exemption that allows Jackson County to appoint its assessor.
Amendment 4Constitutional amendment · Initiative process · Aug 4, 2026
This amendment would require citizen-initiated constitutional amendments to win a majority of voters in each congressional district instead of a single statewide majority. It would also add constitutional prohibitions on foreign nationals and foreign adversaries spending on ballot measure campaigns and add penalties for petition signature fraud.
A yes vote means: Requires initiated constitutional amendments to pass in every congressional district and adds foreign-spending bans and petition fraud penalties to the constitution.
A no vote means: Keeps statewide majority approval for initiated amendments and leaves existing foreign-spending and fraud rules in state law.
Amendment 5Constitutional amendment · Taxes · Aug 4, 2026
This amendment would reduce Missouri's individual income tax as state revenue grows until the tax is eliminated, and would prohibit future state individual income taxes once that happens. It would also reduce personal property and other local taxes when local revenues increase, while prohibiting reductions in public school funding, and limit sales tax expansions unless they are used to reduce the income tax.
A yes vote means: Phases out the state individual income tax based on revenue growth and limits certain other taxes.
A no vote means: Keeps the current income tax and related tax rules unchanged.
Amendment 3Constitutional amendment · Abortion · Nov 3, 2026
This amendment would repeal the right to reproductive freedom that Missouri voters approved in 2024 and prohibit abortion except in cases of medical emergency, fetal anomaly, rape, or incest, with rape and incest exceptions limited to 12 weeks. It would also prohibit gender transition surgeries, cross-sex hormones, and puberty blockers for minors.
A yes vote means: Repeals the 2024 reproductive freedom amendment, prohibits most abortions with limited exceptions, and bans gender transition procedures for minors.
A no vote means: Keeps the existing constitutional right to reproductive freedom and does not add the new prohibitions.
Creation of Show-Me Prosperity Investment Fund AmendmentConstitutional amendment · Taxes · Nov 3, 2026
This amendment would create a permanent state-managed endowment fund, invested in S&P 500 exchange-traded funds, using money appropriated by the legislature plus grants and donations. Once the fund's earnings are sufficient to replace state tax revenue, the earnings would be used to eliminate state-imposed taxes.
A yes vote means: Creates the state-managed investment fund and uses its earnings to replace and eliminate state taxes when sufficient.
A no vote means: Does not create the fund.
Require Election of County Sheriffs AmendmentConstitutional amendment · Law enforcement · Nov 3, 2026
This amendment would require most Missouri counties to elect their sheriffs, establish sheriffs as the chief law enforcement officers in those counties, and limit how sheriffs can be removed from office.
A yes vote means: Requires elected sheriffs in most counties, makes them chief law enforcement officers, and limits their removal from office.
A no vote means: Keeps current law on how counties select and remove sheriffs.
All 2026 ballot measures, state by state →
Statewide measures only, from Ballotpedia's certified list (checked Jul 6, 2026). Local measures appear on your county sample ballot.
Quick answers
Can I register to vote online in Missouri?
Yes — Missouri has official online registration (deadline: Wednesday, October 7, 2026 for the general election). It usually takes a few minutes.
Do I need an excuse to vote by mail?
Yes — Missouri requires an approved excuse (like being away, illness, or disability) to vote by mail.
Can I register on Election Day?
No — same-day registration isn't available in Missouri, so the advance deadline is the one that counts. Online: Received by the fourth Wednesday before Election Day. By mail: Postmarked by the fourth Wednesday prior to Election Day. In person: Received by the fourth Wednesday prior to Election Day before close of business.
When are the 2026 elections?
State Primary: Tuesday, August 4, 2026 · General Election: Tuesday, November 3, 2026
Turn this into your plan
Three questions, then every Missouri deadline lands on your calendar with reminders.
Make your voting planCompiled from official state sources, vote.gov, and Ballotpedia (2026 calendars). Rules occasionally change — when it matters, confirm with the Missouri election office. Found an error? Tell us.