Colorado Petition Signature Requirements (2026)
How many signatures you need to qualify for the ballot in Colorado, the 2026 petition filing windows, and how to validate your signatures against the Colorado voter file.
5%
Of enrolled voters — Attorney General, Secretary Of State, State Treasurer
2026 filing windows have closed — confirm dates with your election authority.
Signature requirements by office
| Office | Minimum signatures | % of enrolled voters | Details |
|---|---|---|---|
| Attorney General, Secretary Of State, State Treasurer | — | 5% | |
| Governor, Lieutenant Governor | — | 5% | |
| State Senator, State Representative | — | 5% | |
| U.S. Senator, U.S. Representative | — | 5% |
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Official sources
Always confirm requirements and deadlines with the official Colorado election authority before you file:
Colorado Secretary of StateFrequently asked questions
How many signatures do I need to get on the ballot in Colorado?
Colorado signature requirements vary by office. Attorney General, Secretary Of State, State Treasurer: 5% of enrolled voters; Governor, Lieutenant Governor: 5% of enrolled voters; State Senator, State Representative: 5% of enrolled voters. See the full table above for all offices.
What is the 2026 petition filing deadline in Colorado?
Filing windows for Colorado have closed or vary by office. Create a free account and confirm dates with your election authority.
Can I validate Colorado petition signatures myself?
Yes. Petition Validator lets you upload petition pages and automatically matches each signer against the Colorado 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.
Petition requirements in other states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Washington
- West Virginia
- Wisconsin
- Wyoming
- District of Columbia
Last updated for the 2026 cycle on May 26, 2026. Always confirm requirements and deadlines with your state or local election authority.