The following is a list of statewide
initiative In political science, an initiative (also known as a popular or citizens' initiative) is a means by which a petition signed by a certain minimum number of registered voters can force a government to choose to either enact a law or hold a pub ...
s and
referenda A referendum (plural: referendums or less commonly referenda) is a Direct democracy, direct and Universal suffrage, universal vote in which an entire Constituency, electorate is invited to vote on a particular proposal and can have nationwide or El ...

modifying state law and proposing state constitutional
amendmentAn amendment is a formal or official change made to a law, contract A contract is a legally binding document between at least two parties that defines and governs the rights and duties of the parties to an agreement. A contract is legally enforc ...
s in
Colorado Colorado (, other variants) is a U.S. state, state in the Mountain states, Mountain West region of the United States. It encompasses most of the Southern Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the weste ...

, sorted by election. The Colorado Legislative Council, an organ of the Colorado General Assembly, maintains a comprehensive list at its website. Measures submitted to popular vote may be classified as follows: Referenda are amendments to state statutes or the state constitution proposed by a two-thirds vote of both houses of the
Colorado General Assembly The Colorado General Assembly is the state legislature A state legislature is a Legislature, legislative branch or body of a State (country subdivision), political subdivision in a Federalism, federal system. Two federations literally use th ...
and must be approved by a simple majority of voters at the next general election. Such referred measures are designated by letter. Initiatives (also referred to simply as Amendments) are amendments to the state statutes or to the state constitution proposed via petition by citizens, and must be signed by a number of registered voters equal to at least 5% of the total number of votes cast for all candidates for the office of secretary of state at the previous general election. Upon acceptance, the initiative is voted upon during the next statewide general election. Amendments are designated by number. The number assigned to a measure when petitions are circulating is generally different from the number ultimately assigned to an initiative when it is placed upon the ballot. There is no difference in Colorado, as of July 16, 2008, between the requirements for placing a statutory change, and a state constitutional change on the ballot, or approving such a change. Colorado Referendum O facing voters in November 2008 would change these requirements by requiring more support at the petition stage to amend the state constitution than to amend a state statute. Colorado voters may also present petitions forcing votes on the repeal of laws enacted by the state legislature without a "safety clause," and may force a public vote on the recall of an elected official. Neither type of ballot issue has been presented to Colorado voters at a statewide level in recent history.


* Colorado state capital referendum, 1881: Denver selected as state capital * Colorado women's suffrage referendum, 1893: Passed: Women's Right to Vote


* Denver Winter Olympics Referendum, 1972: Passed: Opposed to 1976 Winter Olympics being held in Denver * Poundstone Amendment, 1974: Passed: Concerning County Annexations


* Gallagher Amendment, 1982: Passed: Concerning Property Taxes


* Amendment 2, 1992: Passed: Prohibiting anti-LGBT discrimination, overturned in 1996 by Romer v. Evans

November 2, 2004

* Amendment 34: Failed: Construction Liability * Amendment 35: Passed: Tobacco Tax Increase For Health - Related Purposes * Colorado Amendment 36, Amendment 36: Failed: Selection of Presidential Electors * Amendment 37: Passed: Renewable Energy Requirement * Referendum A: Failed: State Personnel System * Referendum B: Passed: Obsolete Constitutional Provisions

November 1, 2005

* Referendum C: Passed: State Spending * Referendum D: Failed: State Borrowing

November 7, 2006

* Colorado Amendment 38, Amendment 38: Failed: Petitions * Amendment 39: Failed: School District Expenditures for Education * Amendment 40: Failed: Term Limits on Court of Appeals and Supreme Court Judges * Colorado Amendment 41, Amendment 41: Passed: Standards of Conduct in Government * Colorado Amendment 42, Amendment 42: Passed: Colorado Minimum Wage Increase * Colorado Amendment 43, Amendment 43: Passed: Traditional Marriage * Colorado Amendment 44, Amendment 44: Failed: Marijuana Possession * Amendment 45: Withdrawn By Proponents On August 22, 2006 after a ballot number was assigned: Domestic Partnerships * Colorado Referendum E, Referendum E: Passed: Extension of Property Tax Exemption of Disabled Veterans * Colorado Referendum F, Referendum F: Failed: Removing Recall Timelines from the Constitution * Colorado Referendum G, Referendum G: Passed: Elimination of Obsolete Constitutional Provisions * Colorado Referendum H, Referendum H: Passed: Unauthorized Alien Labor Tax Deduction * Colorado Referendum I, Referendum I: Failed: Domestic Partnerships * Colorado Referendum J, Referendum J: Failed: Public Schools Expenditure Accountability Act * Colorado Referendum K, Referendum K: Passed: Attorney General Initiate Immigration Lawsuit

November 4, 2008

This list is up-to-date with the list at th
Secretary of State's Elections Center
as of 2008-10-03, when four proposed amendments (53, 55, 56 and 57) were withdrawn by their labor supporters in exchange for agreements from businesses and politicians to actively oppose Amendments 47, 49 and 5

The withdrawn amendments appeared on the ballot, but the votes were not counted. * Colorado Amendment 46, Amendment 46: Failed: Discrimination and Preferential Treatment By Governments * Colorado Amendment 47, Amendment 47: Failed: Prohibition on Mandatory Labor Union Membership and Dues * Colorado Amendment 48, Amendment 48: Failed: Definition Of Person * Colorado Amendment 49, Amendment 49: Failed: Allowable Government Paycheck Deductions * Colorado Amendment 50, Amendment 50: Passed: Limited Gaming in Central City, Black Hawk, and Cripple Creek * Colorado Amendment 51, Amendment 51: Failed: State Sales Tax Increase for Services for People with Developmental Disabilities * Colorado Amendment 52, Amendment 52: Failed: Use of Severance Tax Revenue for Highways * Amendment 53: WITHDRAWN: Criminal Accountability of Business Executives - ''withdrawn by the sponsors'' * Colorado Amendment 54, Amendment 54: Passed: Campaign Contributions from Certain Government Contractors * Amendment 55: WITHDRAWN: Allowable Reasons for Employee Discharge or Suspension - ''withdrawn by the sponsors'' * Amendment 56: WITHDRAWN: Employer Responsibility for Health Insurance - ''withdrawn by the sponsors'' * Amendment 57: WITHDRAWN: Additional Remedies for Injured Employees - ''withdrawn by the sponsors'' * Colorado Amendment 58, Amendment 58: Failed: Severance Taxes on the Oil and Natural Gas Industry * Colorado Amendment 59, Amendment 59: Failed: Education Funding and TABOR Rebates * Colorado Referendum L, Referendum L: Failed: Qualifications For Serving In State Legislature * Referendum M: Passed: Obsolete Constitutional Provisions Relating To Land Value Increases * Referendum N: Passed: Obsolete Constitutional Provisions Relating To Alcoholic Beverages * Referendum O: Failed: Citizen-Initiated State Laws

November 2, 2010

This list is current as of November 3, 201
Secretary of State Election Center
* Amendment 60: Failed: Reduces property taxes and forces the state to pick up the shortfall. * Amendment 61: Failed: Limits government borrowing. * Colorado Amendment 62, Amendment 62: Failed: Definition of Person. * Amendment 63: Failed: Blocks implementation of Patient Protection and Affordable Care Act, PPACA in Colorado. * Proposition 101: Failed: Lowers state income tax rates and reduces automobile registration fees. * Proposition 102: Failed: Amends criteria for setting bail and bond in Colorado.

November 6, 2012

Secretary of State Election Center
accessed Oct 25, 2012.
* Colorado Amendment 64, Amendment 64: Passed: ''Use and Regulation of Marijuana'' * Colorado Amendment 65, Amendment 65: Passed: ''Colorado Congressional Delegation to Support Campaign Finance Limits'' * Amendment S: Passed: ''State Personnel System''

November 3, 2015

* Proposition BB Passed: ''Allows the state to keep revenue from marijuana taxes''

November 8, 2016

Unofficial Results November 8, 2016 General Election
Colorado Secretary of State.
* Amendment 69 Failed: ''Colorado Care'' * Amendment 70 Passed: ''Raising the minimum wage to $12 by 2020'' * Amendment 71 Passed: ''Make it harder to put an amendment into the constitution'' * Amendment 72 Failed: ''Increase Cigarette And Tobacco Taxes'' * Amendment T Failed: ''No Exception To Involuntary Servitude Prohibition'' * Amendment U Failed: ''Exempt Certain Possessory Interests From Property Taxes'' * Proposition 106 Passed: ''Access To Medical Aid-In-Dying Medication'' * Proposition 107 Passed: ''Presidential Primary Elections'' * Proposition 108 Passed: ''Unaffiliated Voter Participation In Primary Elections''

November 6, 2018

https://ballotpedia.org/Colorado_2018_ballot_measures * Colorado Amendment A (2018), Amendment A Passed: ''Repeals a constitutional exception on the ban of slavery that allowed for slavery and involuntary servitude as punishment for a crime'' * Amendment V Failed: ''Reduces age qualification for legislative members from 25 to 21'' * Amendment W Failed: ''Shortens language on the Colorado ballot regarding judicial retention by consolidating questions'' * Amendment X Passed: ''Changes the definition of industrial hemp from a constitutional definition to a statutory definition'' * Amendment Y Passed: ''Establishes an independent commission for congressional redistricting'' * Amendment Z Passed: ''Establishes an independent commission for state legislative redistricting'' * Amendment 73 Failed: ''Establishes income tax brackets and raises taxes to fund education'' * Amendment 74 Failed: ''Requires that property owners be compensated for any reduction in property value caused by state laws or regulations'' * Amendment 75 Failed: ''Changes campaign finance contribution limits and requirements'' * Proposition 109 Failed: ''Authorizes bonds for transportation projects without raising taxes'' * Proposition 110 Failed: ''Authorizes bonds for transportation projects and raises taxes to repay the debt'' * Proposition 111 Passed: ''Restricts the charges on payday loans to a yearly rate of 36 percent'' * Proposition 112 Failed: ''Mandates minimum setbacks for new oil and gas development projects, including fracking''

November 5, 2019

Source: https://ballotpedia.org/Colorado_2019_ballot_measures * Proposition CC Failed: Allows state to retain excess revenue to fund education and transportation * Proposition DD Passed: ''Legalization and taxation'' of ''sports betting''

November 3, 2020

Source: https://ballotpedia.org/Colorado_2020_ballot_measures * 2020 Colorado Amendment 76, Amendment 76 Passed: ''Change the Constitution of Colorado, Colorado Constitution from saying "every citizen" to "only a citizen" can vote'' * 2020 Colorado Amendment 77, Amendment 77 Passed: Remove single bet limits and expand the allowable games in casinos * 2020 Colorado Amendment B, Amendment B Passed: ''Repeals the Gallagher Amendment, Gallagher Amendment of 1982'' * 2020 Colorado Amendment C, Amendment C Pending: ''Lowers the requirement for charities to obtain bingo and gambling licenses from having to exist for five years to only three'' * 2020 Colorado Proposition 113, Proposition 113 Passed: ''Make Colorado join the National Popular Vote Interstate Compact'' * 2020 Colorado Proposition 114, Proposition 114 Pending: ''Reintroduce gray wolves on public lands'' * 2020 Colorado Proposition 115, Proposition 115 Failed: ''Ban abortion after 22 weeks of pregnancy'' * 2020 Colorado Proposition 116, Proposition 116 Passed: ''Decreases the state income tax rate from 4.63% to 4.55%'' * 2020 Colorado Proposition 117, Proposition 117 Pending: ''Requires voter approval for new Taxpayer_Bill_of_Rights#1992_Colorado_amendment, TABOR exempt state enterprises if their revenue is greater than $50 million within its first five years'' * 2020 Colorado Proposition 118, Proposition 118 Passed: ''Establish a paid family and medical leave program to provide 12 weeks of paid leave funded through a payroll tax split 50/50 between employers and employees'' * 2020 Colorado Proposition EE, Proposition EE Passed: Creates a new nicotine tax and increase tobacco taxes in order to fund education and health care

References & notes


Other references

# # # # # {{DEFAULTSORT:Colorado ballot measures Colorado ballot measures, * Colorado law, Ballot measures Colorado politics-related lists, Ballot measures United States law-related lists Lists of referendums