| Election Date | State | Title | Outcome |
|---|---|---|---|
| Nov. 4, 2008 | Colorado | Referendum L: Age Qualification for Serving in General Assembly | Failed |
| Nov. 2, 2010 | Colorado | Amendment Q: Temporary Location for the State Seat of Government | Passed |
| Nov. 6, 2018 | Colorado | Ammendment V: Lower Age Requirement for Members of the State Legislature | Failed |
| Nov. 6, 2018 | Colorado | Amendment Y: Congressional Redistricting | Passed |
| Nov. 6, 2018 | Colorado | Amendment Z: Legislative Redistricting | Passed |
| Nov. 3, 2020 | Colorado | Proposition 117: Voter Approval for Certain New State Enterprises | Passed |