Missouri Petition Signature Requirements (2026)
How many signatures you need to qualify for the ballot in Missouri, the 2026 petition filing windows, and how to validate your signatures against the Missouri voter file.
Signature requirements by office
| Office | Minimum signatures | % of enrolled voters |
|---|---|---|
| State Senator, State Representative | — | 5% |
| State Comptroller | — | 5% |
2026 petition deadlines
State Senator, State Representative; State Comptroller
- Primary petition opens:
- February 24, 2026
- Primary petition deadline:
- March 31, 2026
- General petition opens:
- August 5, 2026
- General petition deadline:
- July 27, 2026
- Primary election:
- August 4, 2026
- General election:
- November 3, 2026
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Upload your petition pages and match every signer against the Missouri voter file in seconds. No paid account required.
Start validating freeMissouri petition rules & details
Primary petition — signature rules
Major-party candidates: declaration of candidacy + filing fee
Primary petition — deadline rules
Filing opens last Tuesday of February, closes last Tuesday of March
General petition — signature rules
Independent candidates: petition required
General petition — deadline rules
Independent candidates file by last Tuesday in July
Primary petition — signature rules
Major-party statewide auditor: declaration + filing fee
Primary petition — deadline rules
Filing window late February through last Tuesday of March
General petition — signature rules
Independent statewide auditor: petition with 1% of last gov vote
Frequently asked questions
How many signatures do I need to get on the ballot in Missouri?
Missouri signature requirements vary by office. State Senator, State Representative: 5% of enrolled voters; State Comptroller: 5% of enrolled voters. See the full table above for all offices.
What is the 2026 petition filing deadline in Missouri?
For the 2026 cycle in Missouri, the primary petition deadline is March 31, 2026, and the general petition deadline is July 27, 2026. Confirm exact dates for your office above and with your election authority.
Can I validate Missouri petition signatures myself?
Yes. Petition Validator lets you upload petition pages and automatically matches each signer against the Missouri voter file — checking registration, address, and duplicates in seconds per signature. You can start free, no paid Victory Waves account required.
How does signature validation work?
You upload images of your petition pages; our system transcribes each signature and matches the signer's name, address, and date against official voter registration data to confirm they're a registered voter in the correct jurisdiction.
Last updated for the 2026 cycle on May 27, 2026. Always confirm requirements and deadlines with your state or local election authority.