| | | | Short Title | | Yes | | No | | Outcome | | Type of Change | |
| | 6 | | An act to Amend the Constitution of the State of Colorado, to provide for a privately operated lottery, supervised and regulated by the Depa | | 19% | | 80% | | Rejected | | Constitutional | |
| | 7 | | An amendment to Section II of Article X of the Constitution of the State of Colorado, concerning the general property tax, establishing a ma | | 23% | | 76% | | Rejected | | Constitutional | |
| | 8 | | An Act to Amend Articles X and XI of the State Constitution to prohibit the State from levying taxes and appropriating or loaning funds for | | 59% | | 40% | | Adopted | | Constitutional | |
| | 9 | | An Act to Amend Chapters 3 and 63, C.R.S. 1963, as amended, by adding three new Articles which require, first that public officials disclose | | 60% | | 39% | | Adopted | | Statutory | |
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| Referendum |
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| | 1 | | Authorizing the conduct of sweepstakes races. | | 49% | | 50% | | Rejected | | Statutory | |
| | 2 | | An Amendment to Article XI of the Constitution of the State of Colorado, providing for a student loan program and the enactment of laws ther | | 54% | | 45% | | Adopted | | Constitutional | |
| | 3 | | An Amendment to Article II of the Constitution of the State of Colorado, relating to equality of rights of the sexes. | | 64% | | 35% | | Adopted | | Constitutional | |
| | 4 | | An Amendment to Articles VIII and IX of the Constitution of the State of Colorado, concerning the state institutions of higher education, an | | 51% | | 48% | | Adopted | | Constitutional | |
| | 5 | | An Amendment to Article V of the Constitution of the State of Colorado, removing the prohibition against increasing or decreasing compensati | | 29% | | 70% | | Rejected | | Constitutional | |
| 1970 |
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| | 1 | | An amendment to section 22 of article IV of the constitution of the State of Colorado, exempting the heads of principal departments establis | | 57% | | 42% | | Adopted | | Constitutional | |
| | 2 | | An amendment to article XII of the constitution of the State of Colorado, creating the Colorado state personnel system, providing therein fo | | 66% | | 33% | | Adopted | | Constitutional | |
| | 3 | | An amendment to articles XI, XIV, and XX of the constitution of the State of Colorado, relating to local government, and providing for home | | 65% | | 34% | | Adopted | | Constitutional | |
| | 4 | | An amendment to article VII of the constitution of the State of Colorado, reducing the minimum age and residency requirements of electors an | | 45% | | 54% | | Rejected | | Constitutional | |
| | 5 | | An amendment to article VII of the constitution of the State of Colorado, changing the residency qualification of electors, and providing th | | 64% | | 35% | | Adopted | | Constitutional | |
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| Referendum |
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| | 1 | | An Amendment to Article IV of the Constitution of the State of Colorado, providing for the election of the Governor and Lieutenant Governor | | 67% | | 32% | | Adopted | | Constitutional | |
| | 2 | | An Amendment to Article X of the Constitution of the State of Colorado, relating to the exemption of publicly owned real property from taxat | | 47% | | 52% | | Rejected | | Constitutional | |
| | 3 | | An Amendment to Article XIV of the Constitution of the State of Colorado, relating to the compensation of county officers. | | 51% | | 48% | | Adopted | | Constitutional | |
| 1966 |
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| | 3 | | An Amendment to Article VI of the Constitution of the State of Colorado, concerning the Judicial Department, and providing for the selection | | 52% | | 47% | | Adopted | | Constitutional | |
| | 4 | | An Act to amend Article V of the State Constitution, providing for a Senate of not more than thirty-five members and a House of Representati | | 70% | | 29% | | Adopted | | Constitutional | |
| | 5 | | An Amendment to Article X of the Constitution of the State of Colorado concerning the General Property Tax, establishing a maximum limitatio | | 31% | | 68% | | Rejected | | Constitutional | |
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| |
| | 1 | | An Amendment to Article IV of the Constitution of the State of Colorado, by the addition of a new section 22, providing that executive and a | | 69% | | 30% | | Adopted | | Constitutional | |
| | 2 | | An Amendment to Section 6 of Article X of the Constitution of the State of Colorado, providing for classification of self-propelled equipmen | | 60% | | 39% | | Adopted | | Constitutional | |