Ballot measure · Colorado · November 3, 2026

Proposition 135

Title as the state lists it: Prohibit Surgery on Minors in Response to Perception of Sex or Gender1,2

Research draftCitizen initiativeState law
How it got there
Citizen initiative
Kind of measure
State law
To pass
A majority of the votes on it
Researched
October 27, 2026

Research draft. We gathered this from official sources on October 27, 2026: election offices, state laws and court records, each linked to its source. Separate reviewers checked a random sample of 48 facts from the ballot-measure research against the cited sources and found no errors. The rest hasn't been reviewed fact by fact yet, so check the linked source before relying on anything here.

§1What your vote means

Drafted by AI from the public sources cited. Each sentence links to its source.

A yes vote

A yes vote would ban surgery on a minor to alter the minor's biological sex characteristics in response to the minor's perception of sex or gender, with exceptions such as male circumcision and treatment of verifiable disorders of sex development, and bar state or federal funds, Medicaid or insurance from paying for it.2 pp. 59-60

A no vote

A no vote would keep current Colorado law, under which these surgeries for minors are not banned and, when medically necessary, can be covered by private insurers or by public health coverage programs.2 pp. 59-60

§2How it got on the ballot

Citizen initiative. Voters proposed it by signing a petition.1,2

State law. It would change state law, not the constitution.1,2

It is on Colorado's list of statewide measures for November 3, 2026.1,2 One of these official sources itself calls the list certified or final. What we couldn't confirm about the list is in the notes on Colorado's measures.

§3What it needs to pass

Drafted by AI from the public sources cited. Each sentence links to its source.

A majority of the votes on it. Needs more yes votes than no votes.1,2,3 Colo. Const. art. V, § 1(4)(a); Blue Book p. 59