| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 6, 2018 | Colorado | Amendment X: Industrial Hemp Definition | Passed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Colorado | Amendment 59: Education Funding and TABOR Rebates | Failed |
| Nov. 5, 2019 | Colorado | Proposition CC: Retain revenue for education and transportation | Failed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Colorado | Amendment 58: Severance Taxes on the Oil and Natural Gas Industry | Failed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 6, 2018 | Colorado | Proposition 111: Limitations on Payday Loans | Passed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Colorado | Amendment 51: State Sales Tax Increase for Services for People with Developmental Disabilities | Failed |
| Nov. 4, 2008 | Colorado | Amendment 56: Employer Responsibility for Health Insurance | Failed |
| Nov. 2, 2010 | Colorado | Amendment 63: Health Care Choice | Failed |
| Nov. 8, 2016 | Colorado | Proposed Initiative 106: Medical Aid in Dying | Passed |
| Nov. 3, 2020 | Colorado | Proposition EE: Taxes on Nicotine Products | Passed |
| Nov. 5, 2024 | Colorado | Amendment 79: Right to Abortion and Health Insurance Coverage Initiative | Passed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Colorado | Referendum M: Elimination of Obsolete Constitutional Provisions Regarding Land Value Increase | Passed |
| Nov. 2, 2010 | Colorado | Amendment R: Exempt Possessory Interests in Real Property | Failed |
| Nov. 2, 2010 | Colorado | Amendment 60: Property Taxes | Failed |
| Nov. 6, 2018 | Colorado | Amendment 73: Funding for Public Schools | Failed |
| Nov. 6, 2018 | Colorado | Amendment 74: Compensation for Reduction in Fair Market Value by Government Law or Regulation | Failed |
| Nov. 3, 2020 | Colorado | Amendment B: Repeal Gallagher Amendment | Passed |
| Nov. 2, 2021 | Colorado | PROPOSITION 120: Property Tax Assessment Rate Reduction and Voter-Approved Revenue Change | Failed |
| Nov. 8, 2022 | Colorado | Initiative 108 - Proposition 123: Colorado Dedicate Revenues to Fund Housing Projects Initiative | Passed |
| Nov. 7, 2023 | Colorado | Proposition HH: Reduce Property Taxes And Voter-approved Revenue Change | Failed |
| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Colorado | Amendment 58: Severance Taxes on the Oil and Natural Gas Industry | Failed |
| Nov. 4, 2008 | Colorado | Amendment 52: Use of Severance Tax Revenue for Highways | Failed |
| Nov. 2, 2010 | Colorado | Proposition 101: Income, Vehicle, and Telecommunication Taxes and Fees | Failed |
| Nov. 5, 2019 | Colorado | Proposition CC: Retain revenue for education and transportation | Failed |