| | | | Short Title | | Yes | | No | | Outcome | | Type of Change | |
|
| Referendum |
| |
| | 1 | | Providing for the reorganization of the Judicial Department | | 64% | | 35% | | Adopted | | Constitutional | |
| | 2 | | Relating to officers in the City and County of Denver | | 38% | | 61% | | Rejected | | Constitutional | |
| | 3 | | Relating to income tax payments and to allow the definition of income as used in the laws of the U.S. | | 53% | | 46% | | Adopted | | Constitutional | |
| | 4 | | Relating to the qualification of voters, including the right to vote for President by non-residents | | 68% | | 31% | | Adopted | | Constitutional | |
| | 5 | | Relating to taxable property: assessment and county boards of equalization | | 50% | | 49% | | Adopted | | Constitutional | |
| | 6 | | Relating to county and local officers, including terms of office | | 49% | | 50% | | Rejected | | Constitutional | |
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|
| Initiative |
| |
| | 3 | | Creating a wildlife management commission and a department of wildlife conservation | | 31% | | 68% | | Rejected | | Constitutional | |
| | 4 | | Providing for daylight savings time | | 45% | | 54% | | Rejected | | Statutory | |
| | 5 | | Concerning a retail sales and use tax and authorizing the vesting in counties, cities and towns the power to impose a retail sales and use tax for local purposes, except for drugs and food for off-premise purposes | | 33% | | 66% | | Rejected | | Constitutional | |
| | 7 | | Authorizing the Governor, with consent of the Senate, to appoint administrative officers of certain departments, to be excluded from the state civil service | | 28% | | 71% | | Rejected | | Constitutional | |
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| |
| | 1 | | Concerning the classified civil service of the state | | 38% | | 61% | | Rejected | | Constitutional | |
| | 2 | | Relating to county officers and changes by vote of the people | | 41% | | 58% | | Rejected | | Constitutional | |
| 1958 |
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| | 4 | | Legalizing the conduct of games of chance (lotto, bingo, and raffles) by certain organizations which operate without profit to dues paying members and only under certain conditions | | 50% | | 49% | | Adopted | | Constitutional | |
| | 5 | | Adding a new section to the Constitution providing membership in any labor union | | 38% | | 61% | | Rejected | | Constitutional | |
|
| Referendum |
| |
| | 1 | | Concerning the competitive civil service of the state | | 48% | | 51% | | Rejected | | Constitutional | |
| | 2 | | Relating to the compensation of county and precinct officers | | 36% | | 63% | | Rejected | | Constitutional | |
| | 3 | | Concerning county government | | 39% | | 60% | | Rejected | | Constitutional | |
| 1956 |
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| | 4 | | Providing for the apportionment of members of the Senate and House of Representatives of the General Assembly | | 31% | | 68% | | Rejected | | Constitutional | |
| | 5 | | Revising the old age pension in the Constitution, establishing a monthly award of $100 to be adjusted to increased living costs, providing for a stabilization fund of $5 million and a medical fund of not to exceed $10 million annually | | 65% | | 34% | | Adopted | | Constitutional | |
|
| Referendum |
| |
| | 1 | | Providing for four year terms of office, beginning in January, 1959, for Governor, Lieutenant Governor, Secretary of State, Auditor of State, State Treasurer, and Attorney General | | 62% | | 37% | | Adopted | | Constitutional | |