2026 voter guide
CO
How to vote in Colorado 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, June 30, 2026
- General Election
- Tuesday, November 3, 2026
- Register online by
- Monday, October 26, 2026
- Register by mail by
- Monday, October 26, 2026(postmarked)
- Register in person by
- Tuesday, November 3, 2026
Deadlines shown are for the November 3, 2026 general election.
Subscribe to these deadlines
One tap adds every Colorado deadline to your calendar — and when rules change, the dates update on their own. No account, no email.
Register to vote
Online: 8 days before Election Day. By mail: Postmarked 8 days before Election Day. In person: Election Day (if voting in-person). Same-day registration available.
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 same-day at the polls.
Already registered? Double-check.
Vote by mail
Colorado runs all-mail elections — every registered voter automatically receives a ballot. No request needed: every registered voter automatically receives a mail ballot.
Returning it: Received by 7pm on Election Day. If you are dropping off your ballot in person or at a dropbox, you are allowed to cast your ballot if you’re in line by 7pm on Election Day.
Vote in person
Early voting
OfferedEvery voter gets a mail ballot. In-person early voting at Voter Service and Polling Centers runs Monday, October 19, 2026 through Election Day (closed Sundays and Saturday, October 24).
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 Colorado's 2026 ballots so far.
DHS Notification for Certain Criminal Charges InitiativeCitizen initiative · Immigration · Nov 3, 2026
This initiative would require law enforcement to notify the U.S. Department of Homeland Security when a person is charged with a crime of violence, or has a prior felony conviction, and the person's immigration status cannot be determined.
A yes vote means: Requires police to notify federal homeland security officials in certain criminal cases where immigration status cannot be determined.
A no vote means: Keeps current law, which does not require this notification.
Penalties for Fentanyl Sale and Possession InitiativeCitizen initiative · Drug policy · Nov 3, 2026
This initiative would increase penalties for fentanyl-related felonies and require treatment for certain drug offenses. It would also limit sentencing exceptions in fentanyl-related crimes that cause another person's death.
A yes vote means: Increases penalties for fentanyl-related felonies and requires treatment for certain drug offenses.
A no vote means: Keeps current fentanyl-related penalties unchanged.
Prohibit Sex- or Gender-Related Surgeries for Minors MeasureCitizen initiative · Healthcare · Nov 3, 2026
This initiative would prohibit healthcare professionals from performing surgeries on people under 18 when done as treatment in response to a minor's perception of sex or gender.
A yes vote means: Prohibits surgeries for minors performed as treatment in response to a minor's perception of sex or gender.
A no vote means: Keeps current law on such surgeries unchanged.
Proposition NNLegislative referral · Education funding · Nov 3, 2026
This measure would raise the state's revenue cap under the Taxpayer's Bill of Rights (TABOR) and use the surplus funds for K-12 education expenses.
A yes vote means: Raises the TABOR revenue cap and uses the retained surplus for K-12 education.
A no vote means: Keeps the current TABOR revenue cap unchanged.
Require Life in Prison for Human Trafficking of Minors MeasureCitizen initiative · Crime · Nov 3, 2026
This initiative would require a sentence of life in prison, without the possibility of parole or release, for people convicted of human trafficking of a child for sexual servitude.
A yes vote means: Requires life in prison without parole for human trafficking of a minor for sexual servitude.
A no vote means: Keeps current sentencing law for this crime unchanged.
Require Vehicle and Fuel Tax Revenue for Road Transportation InitiativeCitizen initiative · Transportation · Nov 3, 2026
This initiative would require state and local governments to spend revenue from sales and excise taxes on motor vehicles and fuel on road transportation. Two-thirds of sales taxes on vehicle parts and materials would also go to roads.
A yes vote means: Dedicates vehicle and fuel tax revenue to road transportation uses.
A no vote means: Keeps current rules for how that revenue can be spent.
Sex Requirement for School and College Sports InitiativeCitizen initiative · School sports · Nov 3, 2026
This initiative would require all K-12 and college school sports teams to be separated based on biological sex unless the team is co-ed.
A yes vote means: Requires K-12 and college sports teams to be separated by biological sex unless the team is co-ed.
A no vote means: Keeps current rules for school sports team eligibility unchanged.
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 Colorado?
Yes — Colorado has official online registration (deadline: Monday, October 26, 2026 for the general election). It usually takes a few minutes.
Do I need an excuse to vote by mail?
No — Colorado runs all-mail elections. Every registered voter automatically receives a ballot.
Can I register on Election Day?
Yes — Colorado offers same-day registration. Online: 8 days before Election Day. By mail: Postmarked 8 days before Election Day. In person: Election Day (if voting in-person). Same-day registration available.
When are the 2026 elections?
State Primary: Tuesday, June 30, 2026 · General Election: Tuesday, November 3, 2026
Turn this into your plan
Three questions, then every Colorado 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 Colorado election office. Found an error? Tell us.