Voter guideStatewide measures
Statewide measure · every Colorado voter

Amendment 86Requirements for Off‑Cycle Congressional Redistricting

Placed on the ballot by citizen initiative • Passes with 55 percent of the vote. Blue Book page 30 (the printed page number; your PDF viewer's page count runs higher).

In plain words

Every ten years, after the census (the national count of people), an independent commission draws Colorado's 8 districts for the U.S. House. Changing that map between those times is called off-cycle redistricting. Amendment 86 would require any off-cycle map to be approved by the commission after at least three public hearings, and adopted by the Colorado Supreme Court. An off-cycle map could not be drawn on purpose to help a political party, or split up communities when it is not needed. source: Blue Book, p. 30

Before and after

QuestionTodayIf Amendment 86 passes
Who draws the regular map?An independent commission, every 10 years after the census. The next one is in 2031.No change
Is there a set process for changing the map between those years?NoYes. The commission must hold at least 3 public hearings and approve it, and the Colorado Supreme Court must adopt it.
Can an off-cycle map be drawn on purpose to help a party?The constitution sets no off-cycle rulesNo
What population numbers must an off-cycle map use?No ruleThe latest census or another data source
Cost to the stateNo added cost today. The cost at right is what this measure would addAbout $370,000 in any year the commission must review an off-cycle map

From the official analysis source: Blue Book, p. 30

Example

Illustration only: Suppose a new congressional map is proposed in 2027, before the next regular redraw in 2031. The commission would have to hold at least three public hearings and approve it, and the Colorado Supreme Court would have to adopt it. The Legislative Department would spend about $370,000 that year. source: Blue Book, p. 30

Biggest change

Who it affects most: Anyone trying to change Colorado's U.S. House districts between the regular ten-year redraws, and voters in those 8 districts.

Cost to the state: About $370,000 for the Legislative Department in any year the commission must meet to review an off-cycle map, for staff, commissioner pay-backs and lawyers. The courts would also have a small amount of added work.

Our plain-words summary at an 8th-grade reading level. Every line points to its source.

What your vote means

YES

Any off-cycle change to Colorado's U.S. House map needs the commission's approval and the Colorado Supreme Court's adoption, and cannot be drawn to help a party.

NO

The commission keeps drawing the map every ten years, and the constitution sets no process for changes in between.

Our plain-words summary.

The Blue Book's official wording of YES and NO (tap to open)

YES: A “yes” vote on Amendment 86 requires the Colorado Independent Congressional Redistricting Commission to approve any new congressional districts proposed outside of a scheduled redistricting year.

NO: A “no” vote on Amendment 86 continues the current requirements for changing congressional districts every ten years.

Why people want it, and why others object

Why this is on the ballot

Why supporters want it

Why opponents object

Who backs each side

Most totals are through October 4, 2026 (Rocky Mountain Voice, Oct 6); some are as of September 21 (Colorado Politics). Spending grows until Election Day. These figures come from news reports of state campaign finance filings and were not checked line by line against the filings.

Sources: Rocky Mountain Voice, Oct 6, 2026 · Colorado Politics, Sept 25, 2026 · Colorado Secretary of State: committees for and against 2026 measures · TRACER campaign finance search

Supporter and opponent arguments are the official ones printed in the Blue Book, written by the Legislative Council's nonpartisan staff after hearing from both sides. Who is registered for and against (Secretary of State) . We don't endorse either side.

At a glance

Our plain-words summary of the official Blue Book analysis. Every line points to its source.

Who it affects

How many: Colorado has eight congressional districts. Based on a 2020 census population of 5.8 million, each district must have 721,714 people. The next regular redistricting is in 2031.

Money: economic and budget impact

If it passes

Any change to congressional districts outside the regular ten-year schedule would need approval by the commission, after at least three public hearings, and adoption by the Colorado Supreme Court. Off-cycle maps could not intentionally favor a political party or unnecessarily divide communities of interest, and must use the latest census or another data source. Because it is a constitutional amendment, changing it later would take another statewide vote.

If it fails

Current rules stay. A new commission draws congressional districts every ten years after the census, with the next in 2031. The constitution does not set a specific process for off-cycle redistricting.

Not yet known

Can it actually be enforced?

Short answer: Mostly yes for Colorado's own officials, with one big federal limit: Congress can override state rules on drawing congressional districts.

Not yet known

This is our reading of the cited law, not legal advice. Court outcomes are uncertain.

Official ballot wording

Official ballot wording, word for word (tap to open)

The ballot title, word for word from the 2026 Blue Book.

Shall there be an amendment to the Colorado Constitution concerning congressional redistricting, and, in connection therewith, reenacting the current process for congressional redistricting in the Colorado Constitution and prohibiting modifications to a final map unless at least three public meetings are held, the modifications do not have the effect of dividing communities of interest or purposefully favoring one political party, and are approved by the congressional redistricting commission and the Colorado Supreme Court?

The official analysis

The full Blue Book analysis, word for word (tap to open)

Everything in this section is quoted from the nonpartisan Legislative Council's 2026 State Ballot Information Booklet (the Blue Book). Charts are described in words. Read the full Blue Book (PDF)

Amendment 86 proposes amending the Colorado Constitution to:

  • require the Colorado Independent Congressional Redistricting Commission and the Colorado Supreme Court to review and approve any proposed changes to congressional districts outside of a scheduled redistricting year; and
  • prohibit off-cycle changes to congressional districts that intentionally favor any political party or unnecessarily divide communities.

Summary and Analysis of Amendment 86

What is congressional redistricting?

Colorado currently has eight congressional districts, which are regions of the state divided to be equal in population and meet other criteria. One person is elected from each of the eight districts to represent Colorado in the U.S. House of Representatives. Congressional redistricting is the process of dividing the state into congressional districts. It usually occurs after a census, which is when all the people in the United States are counted every ten years. Using the state’s population of 5.8 million as of the 2020 census, the current required congressional district population size is 721,714 people.

How is redistricting done in Colorado?

In 2018, Colorado voters amended the Colorado Constitution to create the Colorado Independent Congressional Redistricting Commission (commission). Every ten years, a new commission is formed and is charged with using the population figures from the U.S. Census Bureau, specific legal criteria, and public input from around the state to draw Colorado’s congressional districts. The last commission was formed and completed its work in 2021, and the next commission will meet and create new districts in 2031.

What is off‑cycle redistricting?

Off-cycle redistricting means changing the boundaries of congressional districts between the regular redistricting periods. The current redistricting process, protected in the Colorado Constitution, is designed for redrawing congressional and legislative districts immediately following the census and does not establish a process specifically for off-cycle redistricting. Since 2025, at least ten states have changed their congressional district maps through off-cycle redistricting.

What does Amendment 86 do?

Amendment 86 requires that any off-cycle redistricting, if it were to occur, be approved by the commission and adopted by the Colorado Supreme Court. Before approving any changes, the commission must hold at least three public hearings. The measure also prohibits off-cycle changes to congressional districts that intentionally favor a political party or unnecessarily divide communities of interest. Any such redistricting efforts would require the use of population figures from the most recent census or another data source.

Argument For Amendment 86

1) Amendment 86 protects public participation in any off-cycle changes to congressional districts and ensures that changes are reviewed through a fair and transparent process. Requiring the commission to review districts, and not allowing districts to favor a single political party, keeps partisan politics out of the process. This affirms the voters’ intent in creating an independent commission, which was overwhelmingly approved in a 2018 statewide election. Across the nation, politicians have attempted to change districts in their favor with limited public input. Amendment 86 safeguards the redistricting process in Colorado.

Argument Against Amendment 86

1) If Colorado voters ever want to enact new congressional districts in an off-cycle redistricting year, this measure stands in their way. Whether new districts are in response to partisan redistricting in other states, changes in political priorities, or other concerns with Colorado's congressional districts, this measure creates an unnecessary constitutional barrier. Further, if voters feel that the districts created by the commission during the regularly scheduled redistricting no longer meet the needs of the state, that same commission should not play a role in the process. Voters should always have the final word on whether Colorado’s congressional districts still reflect the state’s needs. Information about the organizations supporting and opposing this measure is available on the Colorado Secretary of State's website:

www.coloradosos.gov/pubs/elections/Initiatives/ballot/contacts/2026.html

Fiscal Impact of Amendment 86

State Spending

The measure increases costs in the Legislative Department by about $370,000 in any year that the commission must convene and review changes to congressional maps outside of its usual redistricting schedule. The costs are to staff the commission, provide reimbursement for commissioners, and hire legal counsel. The Judicial Department will also have a small workload increase to review any new maps.

Latest news

Recent reporting from a range of outlets, newest first. We link to it; we don't endorse it.

Coverage of all the statewide measures

What people are saying

Official campaign accounts on each side, and public posts. Links only: nothing here loads from social media sites. We link to posts; we don't endorse them.

Supporters (yes)

No official campaign accounts listed yet.

Opponents (no)

No official campaign accounts listed yet.

Full text of the measure

Word for word from the Blue Book, pages 71 to 79 (PDF ). Where the measure changes existing statutes, new wording is in CAPITAL LETTERS, as in the printed booklet.

Show the full text

Read more