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Map the Midterms2026 midterms information · not official

Colorado hub

Colorado 2026 midterms: ballot, races, and key dates

Colorado’s September 4, 2026 candidate list marks a U.S. Senate seat, statewide executive offices, and statewide courts, and the state lists certified 2026 ballot measures.

Last updated: October 18, 2026. Unofficial information. Confirm with your official election office (Colorado Secretary of State — Elections).

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Official election office

  • Colorado is on Mountain Time.
  • A registration deadline was not printed on the candidate list or the certified-measures page read October 18, 2026. The Secretary of State publishes the calendar.
  • An early-voting period was not printed on the candidate list or the certified-measures page read October 18, 2026. The Secretary of State publishes the calendar.
  • A mail-ballot deadline was not printed on the candidate list or the certified-measures page read October 18, 2026. The Secretary of State publishes the calendar.
  • Identification rules are published by the Colorado Secretary of State.

Colorado Secretary of State — Elections

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Statewide offices on the November 3, 2026 ballot

  • US Senate (Class II, term expires in 2027)
  • Governor
  • Lt. Governor
  • Secretary of State
  • State Treasurer
  • Attorney General
  • Colorado Supreme Court
  • Colorado Court of Appeals

Last checked October 18, 2026. Sources: Colorado Secretary of State — 2026 general election official candidate list; Colorado Secretary of State — amendments and propositions on the 2026 ballot; U.S. Senate — Class II, terms expire in 2027

Key 2026 general election dates

Dates below are paraphrased from the official pages linked on each line and were last checked against those pages on October 18, 2026. They can change. Colorado Secretary of State — Elections publishes the current calendar. County voting hours vary. “Passed,” “Deadline today,” “In progress,” and “Upcoming” markers use only the date on the device. They ignore cutoff times and the state’s time zone, so a deadline marked for today may already have closed. The marker is not an official cutoff.

Voter registration

The September 4, 2026 candidate list and the certified-measures page, read on October 18, 2026, do not print this deadline. The Colorado Secretary of State publishes the calendar.

Early voting

The September 4, 2026 candidate list and the certified-measures page, read on October 18, 2026, do not print this deadline. The Colorado Secretary of State publishes the calendar.

Mail-ballot request

The September 4, 2026 candidate list and the certified-measures page, read on October 18, 2026, do not print this deadline. The Colorado Secretary of State publishes the calendar.

Mail-ballot return

The September 4, 2026 candidate list and the certified-measures page, read on October 18, 2026, do not print this deadline. The Colorado Secretary of State publishes the calendar.

Compare with other states · Colorado Secretary of State — Elections

Questions about the Colorado 2026 midterms

Short answers from the offices and race guides already linked on this page. Registration and voting rules are published by Colorado Secretary of State — Elections.

What is on the Colorado ballot in the 2026 midterms?
The Colorado Secretary of State’s 2026 general-election official candidate list, certified to the counties on September 4, uses District “State” for US Senate, Governor, Lt. Governor, Secretary of State, State Treasurer, Attorney General, Colorado Supreme Court, and Colorado Court of Appeals. The amendments-and-propositions page says it is an official list of state certified ballot measures on the 2026 November general-election ballot. The U.S. Senate Class II page, read October 18, 2026, includes Colorado among seats whose terms expire in 2027. Those titles are the headings on the Secretary of State’s page of state certified ballot measures for the 2026 November general election.
Where are official Colorado sample-ballot and registration pages?
Go Vote Colorado is the official sample-ballot page. Colorado Secretary of State — Elections publishes registration and election rules. Vote.gov: Colorado registration information. Map the Midterms does not look up voter records, issue sample ballots, or request mail ballots.
Which Map the Midterms race guides cover Colorado?
Map the Midterms does not yet publish a Colorado race guide. Contests for an address are on the official sample ballot.
When is Election Day 2026 in Colorado?
The 2026 U.S. midterm general election is Tuesday, November 3, 2026. The September 4, 2026 candidate list and the certified-measures page, read on October 18, 2026, do not print registration, early-voting, or mail-ballot deadlines. The Colorado Secretary of State publishes the current calendar. Colorado is on Mountain Time.
Is Map the Midterms an official Colorado election website?
No. Map the Midterms is an informational site operated by Joshua Israel Ventures LLC, a Florida limited liability company. It is not a government, secretary of state, or county election website. The official election office for Colorado is Colorado Secretary of State — Elections. Registration, sample ballots, and voting rules are published there and on Vote.gov: Colorado registration information.

Colorado Secretary of State — Elections · Go Vote Colorado · Vote.gov: Colorado registration information · Sample ballot structure