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Midterm WatchRaces · forecasts · voting guides

Colorado voting guide

Open the election authority’s current instructions

Colorado · November 3, 2026

In-person registration remains available through Election Day; location, identification and ballot rules apply. OFF-CO · BP-REG · VOTE-REG

Ordinary domestic voters; same-day registration routes and local conditions remain distinct.
Registration routeDateRuleEvidence
OnlineOct 26OFF-CO · BP-REG · VOTE-REG
MailOct 26postmarkedOFF-CO · BP-REG · VOTE-REG
In personNov 3OFF-CO · BP-REG · VOTE-REG
A displayed window does not mean every site is open every day. Times are local unless a named time zone is given.
Voting taskDate or windowInstructions
Mailed ballot requestAutomatically mailed; see exceptionsBallots automatically mailed to eligible active registered voters; contact the election authority for a replacement or alternate-address request. BP-MAIL · VOTE-MAIL
In-person early/absentee routeOct 19–Nov 3Voter service centers operate through Election Day. Sites and hours vary; active registered voters are automatically mailed ballots. BP-EARLY · VOTE-EARLY
Ballot returnMethod-specific ruleThe election authority must have the ballot by 7 p.m. on Nov 3; an Election Day postmark alone does not meet this receipt deadline. BP-RETURN · VOTE-MAIL
Election Day hours7 a.m. to 7 p.m.Colorado conducts its elections largely by mail. BP-HOURS · VOTECLOCK · GP-HOURS

Voter service centers operate through Election Day. Sites and hours vary; active registered voters are automatically mailed ballots. OFF-CO · BP-MAIL · VOTE-MAIL · BP-RETURN · BP-EARLY · VOTE-EARLY

Official state election information and ballot lookup. Military/overseas, emergency, accessible-ballot and special-eligibility rules can differ.

2026 House districts; all outlooks are pre-election assessments.
House districtOutlookDDHQ / Cook
CO-1Safe DSafe D / Safe D DDHQ-H · COOK-H
CO-2Safe DSafe D / Safe D DDHQ-H · COOK-H
CO-3Lean RLean R / Likely R DDHQ-H · COOK-H
CO-4Likely RLikely R / Safe R DDHQ-H · COOK-H
CO-5Lean RLikely R / Lean R DDHQ-H · COOK-H
CO-6Safe DSafe D / Safe D DDHQ-H · COOK-H
CO-7Safe DSafe D / Safe D DDHQ-H · COOK-H
CO-8Toss-upLikely D / Toss-up DDHQ-H · COOK-H