Electoral MeridianIndependent Election Research

Forecasts. Results. Evidence.

States · Colorado

Colorado Proposition 135

Prohibit Surgery on Minors in Response to Perception of Sex or Gender. 2026 results by county, from Colorado's official results file: Yes 51.9%, No 48.1% statewide.

Statewide

Ballot title: Shall there be a change to the Colorado Revised Statutes modifying existing law by prohibiting surgery on a minor for the purpose of altering the minor’s biological sex characteristics, and, in connection therewith, prohibiting any health-care professional or other person from knowingly performing, prescribing, administering, or providing any surgery to a minor for the purpose of altering the minor’s biological sex characteristics and prohibiting the use of state or federal funds, Medicaid reimbursement, or insurance coverage to pay for this type of surgery?

A yes vote
A “yes” vote on Proposition 135 prohibits surgeries on minors that would alter their biological sex characteristics as a treatment in response to a minor’s perception of sex or gender, and prohibits the use of government funds or health insurance to pay for the surgeries.
A no vote
A “no” vote on Proposition 135 maintains Colorado law, which protects access to surgery altering minors’ biological sex characteristics and allows public and private health insurance programs to pay for these surgeries.
Yes 51.9% No 48.1%

1,373,942 yes and 1,273,598 no.

The state's ballot guide, page 59 · The state's unofficial results

The state's unofficial totals. We don't call measures.

By county

64 counties: Yes has the most votes in 49, No has the most votes in 15. The figures for each county are from the same file and add up to the statewide totals.

CountyYesNoVotes
Adams County52.6%47.4%194,831
Alamosa County60.9%39.1%6,003
Arapahoe County49.1%50.9%264,074
Archuleta County65.7%34.3%7,327
Baca County83.9%16.1%1,566
Bent County76.9%23.1%1,634
Boulder County31.5%68.5%170,591
Broomfield County44.3%55.7%39,739
Chaffee County51.0%49.0%12,797
Cheyenne County88.0%12.0%860
Clear Creek County51.7%48.3%4,995
Conejos County69.2%30.8%3,352
Costilla County56.4%43.6%1,714
Crowley County77.6%22.4%1,305
Custer County74.3%25.7%3,170
Delta County71.2%28.8%16,001
Denver County29.9%70.1%302,385
Dolores County77.0%23.0%1,210
Douglas County61.7%38.3%203,450
Eagle County50.0%50.0%23,168
El Paso County62.9%37.1%312,552
Elbert County79.4%20.6%17,207
Fremont County73.7%26.3%19,929
Garfield County56.2%43.8%25,156
Gilpin County54.1%45.9%3,344
Grand County59.0%41.0%8,593
Gunnison County44.5%55.5%9,254
Hinsdale County67.8%32.2%484
Huerfano County64.2%35.8%3,683
Jackson County79.2%20.8%638
Jefferson County47.9%52.1%306,140
Kiowa County88.2%11.8%694
Kit Carson County84.8%15.2%2,901
La Plata County47.1%52.9%29,437
Lake County50.0%50.0%3,342
Larimer County48.1%51.9%192,060
Las Animas County65.0%35.0%6,402
Lincoln County81.8%18.2%1,930
Logan County79.8%20.2%7,726
Mesa County66.3%33.7%74,731
Mineral County62.5%37.5%626
Moffat County80.0%20.0%5,250
Montezuma County64.1%35.9%12,401
Montrose County70.8%29.2%21,095
Morgan County74.5%25.5%10,179
Otero County72.9%27.1%7,074
Ouray County49.1%50.9%3,507
Park County64.2%35.8%9,673
Phillips County82.5%17.5%1,892
Pitkin County41.5%58.5%8,882
Prowers County77.0%23.0%3,968
Pueblo County62.8%37.2%67,449
Rio Blanco County83.2%16.8%2,908
Rio Grande County68.8%31.2%4,780
Routt County47.1%52.9%13,529
Saguache County56.5%43.5%2,695
San Juan County46.0%54.0%561
San Miguel County37.6%62.4%4,000
Sedgwick County80.0%20.0%1,062
Summit County42.9%57.1%14,367
Teller County74.0%26.0%13,630
Washington County84.9%15.1%2,252
Weld County65.1%34.9%145,673
Yuma County82.3%17.7%3,712

The share with the most votes in each place is in bold. That's the count, not a result.

Sources & scope

Colorado's official results, file posted Nov 13, 4:49 PM. Unofficial until certified. Colorado's page has its other statewide offices, ballot measures and legislature.