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List of Colorado ballot measures

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The U.S. state of Colorado has had a system of direct voting since gaining statehood in 1876. Citizens and the Colorado General Assembly both have the ability to place new legislation, those recently passed by the General Assembly, and constitutional amendments on the ballot for a popular vote. Colorado has three types of ballot measures that can be voted on in a statewide election: initiatives, referendums, and legislatively referred measures. For a measure to be placed on the ballot, supporters must gather signatures from registered voters. From 1877 to 1910, the only ballot measures allowed were legislatively referred measures. In 1910, Referendum 3 was placed on the ballot by the General Assembly and passed, creating a citizen-led process for initiatives and referendums. The first successful citizen-initiated measures were passed in 1912.

Since that time, ballot measures have played a major role in Colorado politics. After Denver was awarded the hosting rights to the 1976 Winter Olympics, citizens moved to block funding the games with a referendum in 1972. A 1990 ballot measure instituting term limits for many elected officials helped galvanize a nationwide movement for term limits, and in 2000 Amendment 20 legalized the medical use of marijuana. That measure was followed by full legalization in 2012 with Amendment 64, and the legalization of psilocybin mushrooms in 2022 with Proposition 122.

Background

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A young woman suffragette sits in a chair near a banner reading "Colorado Women are Citizens." The woman wears a fur coat, hat, and leather gloves. Tassels dangle from the top and bottom of the banner.
A Colorado woman campaigns for women's suffrage

The 1876 Constitution of Colorado included procedures for the General Assembly to place measures on the ballot in a statewide election. In the 1890s, a grassroots movement to increase citizen power began, culminating in a special session of the legislature to discuss initiative and referendums in 1910. That session resulted in 1910's Referendum 3, which passed with over 76% of the vote and created a citizen-initiated process.[1]

Propositions are statutory and amend the Colorado Revised Statutes, whereas amendments change the state constitution. From 1877 to 2016, constitutional amendments, like propositions, required only a simple majority to pass. Following the passage of Amendment 71 in 2016, amendments require 55% of the vote to pass, unless the amendment is to remove language from the constitution.[2][3][4] Referred propositions and amendments are lettered, whereas citizen initiatives are numbered.[5]

In 2020, as part of his administration's response to the COVID-19 pandemic, Governor Jared Polis issued an emergency rule allowing petition signature gatherers to do so via email and mail, rather than in-person efforts. The change, while upheld by the Denver District Court, was overturned by the Colorado Supreme Court later that year.[6]

After the 1876 Constitution was adopted, a legislatively referred constitutional amendment that would have granted women the right to vote was placed on the ballot for the 1877 election.[7]: 92  The measure failed, with over two-thirds of voters against it.[8] Henry Blackwell, a founder of the American Woman Suffrage Association, summed up the unsuccessful campaign by saying "Woman Suffrage can never be carried by a popular vote without a political party behind it".[9] Blackwell was proven correct in 1893 when, in part due to gains made by the Colorado People's Party in the General Assembly, voters supported a women's suffrage ballot measure by a 55%–45% margin.[10][7]: 124–158 

In 1970, the International Olympic Committee granted Denver hosting rights for the 1976 Winter Olympics.[11] Governor John Love claimed that the games would cost taxpayers only $5,000,000. Activists quickly noted a wide variety of issues with the state's cost estimate, however, including a lack of transportation infrastructure, no planning for the Olympic Village, and issues with planned events sites.[12] A petition for 1972's Measure 8 quickly reached the necessary 51,000 signatures and 60% of Coloradans voted to prohibit the state from funding the Olympics. Later estimates found that the cost for Denver to host the games would have been $92,000,000, over 18 times the state's estimate.[13] Richard Lamm, who was a leader in the local anti-Olympics movement, would later parlay his fame from the measure into three terms as Governor.[14]

A woman stands in front of a vast greenhouse containing marijuana plants, flashing the camera with two peace signs
Commercial marijuana operations, such as the one pictured, were legalized as a result of 2012's Amendment 64.

The 1984 ballot included Amendment 3, which barred the use of state funds for abortion services. The measure passed by less than one percentage point and gave Colorado the distinction of being both the first state to decriminalize abortion, having done so in 1967, and the first state to prohibit the government from funding it.[15] 1990's Amendment 5 has been credited by the Initiative & Referendum Institute as having started the term limits movement in the United States and was followed by similar initiatives in 1994 and 1996. Colorado's efforts were unique because they placed term limits on members of Congress in addition to state-level officials.[1] The term-limits movement resulted in the Supreme Court case U.S. Term Limits, Inc. v. Thornton (1995), which determined that states could not place restrictions on congresspeople beyond the constitutional requirements.[16][17]

In 2000, Amendment 20 passed with 54% of the vote and legalized the medical use of marijuana in the state.[18] It was followed by 2012's Amendment 64, which passed by similar margins and legalized the recreational use of marijuana.[19] The Economist described the vote as "an electoral first not only for America but for the world."[20] Colorado continued this trend of loosening drug policy in 2022 when voters passed Proposition 122 and legalized the use of psilocybin mushrooms in designated "healing centers".[21]

Types of ballot measures

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Citizen-initiated

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The Constitution of Colorado grants citizens some initiative and referendum powers in Article V. In order for a measure to be placed on the ballot, a petition must receive signatures equal to 5% of the votes cast in the previous election. The governor's veto power does not extend to citizen-initiated measures, which go into effect within one month of election returns being certified.[22][23]

  • Initiatives create new state statutes or constitutional amendments. They may be placed on the ballot if their petition is filed at least three months before the upcoming election.[23]
  • Referendums repeal legislation passed in the previous General Assembly session. They may be placed on the ballot if their petition is filed at least 90 days after the previous General Assembly session adjourns.[22]

Government-initiated

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At the General Assembly's discretion, the legislature may place additional measures on the ballot. Article XIX of the Constitution requires that constitutional amendments passed by the legislature be voted on in the next general election.[22] The General Assembly can also vote to place statute changes and proposed spending on the general election ballot.[24]

1800s

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1877

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Ballot Measures from 1877
Measure name Description[8] Status[8] Yes votes No votes
Referendum 1 A constitutional amendment granting women the right to vote Failed 6,612 (32.00%) 14,053 (68.00%)

1880

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Ballot Measures from 1880
Measure name Description[25] Status[25] Yes votes No votes
Amendment 1 A constitutional amendment requiring uniform taxation Passed 19,198 (84.80%) 3,436 (15.20%)

1881

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Ballot Measures from 1881
Measure name Description[26] Status[26] Yes votes No votes
State Capital Referendum A referendum on whether the permanent location of the state capital should be Denver or some other location[a] Passed[b] 30,248 (66.48%) 15,249 (33.52%)

1882

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Ballot Measures from 1882
Measure name Description[25] Status[25] Yes votes No votes
Amendment 2 A constitutional amendment establishing salaries for some state officials Passed 32,858 (79.00%) 8,738 (21.00%)

1884

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Ballot Measures from 1884
Measure name Description[25] Status[25] Yes votes No votes
Amendment 3(a) A constitutional amendment modifying some General Assembly procedures Passed 47,020 (88.00%) 6,413 (12.00%)
Amendment 3(b) A constitutional amendment modifying some General Assembly procedures Passed 45,080 (87.90%) 6,188 (12.10%)
Amendment 3(c) A constitutional amendment modifying some General Assembly procedures Passed 45,394 (88.00%) 6,180 (12.00%)

1886

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Ballot Measures from 1886
Measure name Description[25] Status[25] Yes votes No votes
Amendment 4 A constitutional amendment vesting judicial power in the state court system Passed 17,068 (63.90%) 9,629 (36.10%)
Amendment 5 A constitutional amendment relating to "original jurisdiction" Passed 16,897 (64.10%) 9,453 (35.90%)
Amendment 6 A constitutional amendment providing for additional judges on the Colorado Supreme Court Failed 6,478 (30.00%) 15,132 (70.00%)
Amendment 7 A constitutional amendment allowing the General Assembly to establish criminal courts Failed 7,549 (29.00%) 18,512 (71.00%)
Amendment 8 A constitutional amendment allowing the General Assembly to create police magistrates Failed 7,148 (27.80%) 18,553 (72.20%)
Amendment 9 A constitutional amendment relating to judges on Colorado district courts Passed 14,938 (57.90%) 10,867 (42.10%)
Amendment 10 A constitutional amendment allowing the General Assembly to modify the state court system Passed 14,568 (51.00%) 14,022 (49.00%)

1887

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Ballot Measures from 1887
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to the public debt Passed -- --

1888

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Ballot Measures from 1888
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment limiting the reasons to contract public debt Passed 15,212 (53.20%) 13,385 (46.80%)
Measure 2 A constitutional amendment raising property taxes Failed 749 (7.90%) 8,778 (92.10%)
Measure 3 A constitutional amendment limiting the reasons to contract public debt Passed 13,921 (51.30%) 13,209 (48.70%)
Measure 4 A constitutional amendment limiting the reasons to contract public debt Passed -- --

1890

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Ballot Measures from 1890
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment modifying the size and salaries of the Colorado Supreme Court Failed 15,283 (42.10%) 20,991 (57.90%)
Measure 2 A constitutional amendment relating to "compensation and services" Failed 15,395 (43.40%) 20,078 (56.60%)

1892

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Ballot Measures from 1892
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to uniform taxation Passed 13,713 (52.70%) 12,294 (47.30%)
Measure 3 A constitutional amendment relating to the maximum tax rate Passed 12,440 (51.50%) 11,731 (48.50%)

1893

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Ballot Measures from 1893
Measure name Description[25] Status[7] Yes votes No votes
Measure 2 A constitutional amendment granting women the right to vote[c] Passed 35,798 (54.90%) 29,451 (45.10%)

1894

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Ballot Measures from 1894
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to locality's "pledging of credit" Failed 26,434 (33.80%) 51,711 (66.20%)
Measure 2 A constitutional amendment relating to limits on state debt Failed 22,393 (29.50%) 53,634 (70.50%)
Measure 3 A constitutional amendment relating to city debt Failed 21,293 (29.70%) 50,513 (70.30%)

1896

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Ballot Measures from 1896
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to limits on state debt Failed 25,340 (38.90%) 39,790 (61.10%)

1900–1949

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1900

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Ballot Measures from 1900
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to the process to amend the constitution Passed 31,471 (73.10%) 11,568 (26.90)

1902

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Ballot Measures from 1902
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to the election process for county commissioners Passed 49,646 (65.10%) 26,559 (34.90%)
Measure 2 A constitutional amendment relating to the city and county of Denver Passed 59,750 (69.90%) 25,767 (30.1%)
Measure 3 A constitutional amendment relating to the eight-hour work day[27] Passed 72,980 (73.50%) 26,266 (26.50%)
Measure 4 A constitutional amendment relating to voter qualifications Passed 44,769 (62.30%) 27,077 (37.70%)
Measure 5 A constitutional amendment relating to the election process for district attorneys Passed 45,191 (64.20%) 25,243 (35.80%)
Measure 6 A constitutional amendment relating to property tax exemptions Failed 32,710 (31.10%) 72,370 (68.90%)
Measure 7 A constitutional amendment relating to tax limits Failed 31,527 (31.10%) 69,741 (68.90%)
Measure 8 A constitutional amendment relating to the election process for justices of the peace Passed 48,682 (65.10%) 26,082 (34.90%)
Measure 9 A constitutional amendment relating to the election process for county officials Passed 48,944 (65.20%) 26,140 (34.80%)
Measure 10 A constitutional amendment relating to the election process for county judges Passed 44,856 (63.90%) 25,326 (36.10%)

1904

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Ballot Measures from 1904
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to exemptions to uniform taxation Passed 42,696 (80.30%) 10,444 (19.70%)
Measure 2 A constitutional amendment relating to the Colorado Supreme Court Passed 5,863 (56.40%) 4,528 (43.60%)
Measure 3 A constitutional amendment relating to the Colorado Supreme Court Passed 5,006 (54.50%) 4,174 (45.50%)
Measure 4 A constitutional amendment relating to the Colorado Supreme Court Passed 5,389 (55.70%) 4,293 (44.30%)
Measure 5 A constitutional amendment relating to the Colorado Supreme Court Passed 5,264 (55.50%) 4,218 (44.50%)

1906

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Ballot Measures from 1906
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment relating to the election process and voting machines Passed 27,460 (72.40%) 10,467 (27.60%)

1908

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Ballot Measures from 1908
Measure name Description[25] Status[28] Yes votes No votes
Referendum 1 A constitutional amendment allowing the state to issue bonds for the purpose of paying outstanding warrants Failed 26,254 (48.98%) 27,352 (51.02%)
Referendum 2 A constitutional amendment modifying the salaries of state officials and judges Failed 16,088 (29.88%) 37,753 (70.12%)
Referendum 3 A constitutional amendment modifying the salaries of county officials Failed 18,558 (39.00%) 29,022 (61.00%)

1910

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Ballot Measures from 1910
Measure name Description[25] Status[29] Yes votes No votes
Referendum 1 A constitutional amendment allowing the state to issue bonds for the purpose of paying outstanding warrants Passed 40,054 (50.39%) 39,441 (49.61%)
Referendum 2 A constitutional amendment modifying the Colorado Board of Land Commissioners Passed 42,128 (66.42%) 21,300 (33.58%)
Referendum 3 A constitutional amendment creating an initiative and referendum process in the state Passed 89,141 (76.95%) 26,698 (23.05%)
Referendum 4 A constitutional amendment modifying the salaries of state legislators Passed 39,245 (55.83%) 31,047 (44.17%)
Referendum 5 A constitutional amendment relating to higher education institutions Passed 59,295 (79.70%) 15,105 (20.30%)

1912

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Ballot Measures from 1912
Measure name Description[25] Status[30] Yes votes No votes
Measure 1 A constitutional amendment prohibiting alcoholic beverages statewide Failed 75,877 (39.39%) 116,774 (60.61%)
Measure 2 An initiative allowing search and seizure to enforce prohibition laws Failed 64,616 (44.93%) 79,190 (55.07%)
Measure 3 An initiative creating an eight-hour workday for female employees Passed 108,959 (77.29%) 32,019 (22.71%)
Measure 4 An initiative establishing regulations for public service corporations Failed 30,347 (32.12%) 64,138 (67.88%)
Measure 5 An initiative establishing a Colorado State Fair Failed 49,102 (48.35%) 52,462 (51.65%)
Measure 6 A constitutional amendment allocating funds for the Colorado Immigration Bureau Failed 30,359 (35.87%) 54,272 (64.13%)
Measure 7 An initiative introducing cost-saving measures for publicizing future ballot measures Failed 39,551 (43.85%) 50,635 (56.15%)
Measure 8 A constitutional amendment allowing home rule for counties Passed 49,596 (52.55%) 44,778 (47.45%)
Measure 9 A constitutional amendment establishing a recall process for elected officials Passed 53,620 (57.54%) 39,564 (42.46%)
Measure 10 An initiative modifying election laws Failed 37,616 (49.40%) 38,537 (50.60%)
Measure 11 An initiative establishing a special election system for ballot measures Failed 33,413 (45.12%) 40,634 (54.88%)
Measure 12 A constitutional amendment establishing a definition for "contempt of court" and allowing for jury trials for such charges Failed 31,850 (43.21%) 41,855 (56.79%)
Measure 13 A constitutional amendment establishing a public utilities court with exclusive power over rates Failed 27,534 (34.70%) 51,820 (65.30%)
Measure 14 An initiative providing for a "headless ballot" to be used in elections Passed 43,390 (52.34%) 39,504 (47.66%)
Measure 15 A constitutional amendment extending wider control of schools to the public Failed 38,318 (40.76%) 55,691 (59.24%)
Measure 16 A constitutional amendment establishing juvenile courts in localities with populations greater than 100,000 people Passed 55,416 (57.54%) 40,891 (42.46%)
Measure 17 An initiative to allocate some public aid to supporting the children of single mothers Passed 82,337 (68.50%) 37,870 (31.50%)
Measure 18 An initiative modifying the laws relating to civil service Passed 38,426 (52.13%) 35,282 (47.87%)
Measure 19 An initiative establishing an eight-hour workday for people working in underground mines, smelters, mills, and coke ovens Passed 52,525 (51.85%) 48,777 (48.15%)
Measure 20 An initiative allocating control of some funds to the Colorado Highway Commission Failed 44,568 (49.70%) 45,101 (50.30%)
Measure 21 A referendum to uphold a law requiring teacher examinations Failed 25,369 (31.93%) 54,086 (68.07%)
Measure 22 A referendum upholding a law modifying water rights relating to irrigation Failed 22,931 (32.51%) 47,614 (67.49%)
Measure 23 A referendum upholding a law which altered the rules surrounding the branding of livestock Failed 37,387 (49.77%) 337,740 (50.23%)
Measure 24 A constitutional amendment replacing the Colorado Board of Equalization with the Colorado Tax Commission Failed 32,548 (44.86%) 40,012 (55.14%)
Measure 25 A referendum upholding a law which established an eight-hour workday for people working in underground mines, smelters, and coke ovens Passed 69,489 (69.16%) 30,992 (30.84%)
Measure 26 A referendum upholding a law requiring teachers to attend summer trainings Failed 23,521 (27.10%) 63,266 (72.90%)
Measure 27 A constitutional amendment allowing county officials to be paid from outside sources Failed 28,889 (40.97%) 41,622 (59.03%)
Measure 28 A constitutional amendment raising the limitation on county debts Failed 29,741 (38.61%) 47,284 (61.39%)
Measure 29 A referendum upholding a law which changed some rules related to the management of public funds Failed 20,968 (32.12%) 44,322 (67.88%)
Measure 30 A constitutional amendment defining mining and smelting as public interests Failed 35,997 (48.68%) 37,953 (51.32%)
Measure 31 A constitutional amendment allowing the state to issue bonds for the purpose of funding state highways Failed 36,636 (40.72%) 53,327 (59.28%)
Measure 32 An initiative authorizing the construction of a tunnel through James Peak Failed 45,800 (32.95%) 93,183 (67.05%)

1914

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Ballot Measures from 1914
Measure name Description[25] Status[31] Yes votes No votes
Measure 1 A constitutional amendment requiring that rejected measures not be placed on the ballot again until six years have passed Failed 55,667 (33.09%) 112,537 (66.91%)
Measure 2 A constitutional amendment prohibiting alcohol Passed 129,589 (52.30%) 118,176 (47.70%)
Measure 3 A constitutional amendment allowing women to serve as jurors and requiring 3/4 of jurors to agree for a verdict to be reached Failed 67,130 (46.42%) 77,488 (53.58%)
Measure 4 A constitutional amendment creating a process by which citizens could petition for a special election solely for ballot measures Failed 40,643 (33.42%) 80,977 (66.58%)
Measure 5 An initiative to codify some laws relating to women and children Failed 68,242 (48.62%) 72,122 (51.38%)
Measure 6 An initiative providing for probation in criminal cases involving minors and first offenders Failed 62,561 (47.73%) 68,512 (52.27%)
Measure 7 An initiative increasing the state roads fund for the purpose of constructing new highways Passed 117,146 (68.51%) 53,844 (31.49%)
Measure 8 A constitutional amendment defining newspapers as public utilities Failed 35,752 (28.11%) 91,426 (71.89%)
Measure 9 A referendum upholding a law relating to the capitalization of public utilities Failed 37,633 (37.20%) 63,603 (62.80%)
Measure 10 A referendum upholding a law relating to the licensing and regulation of commission merchants Failed 39,448 (36.90%) 67,454 (63.10%)
Measure 11 A referendum upholding a law relieving employees from assuming risk of injury or death Passed 69,006 (53.37%) 60,298 (46.63%)
Measure 12 A referendum upholding a law which altered the peace officer appointment process Failed 49,116 (42.36%) 66,836 (57.64%)
Measure 13 A referendum upholding a law relating to a public utilities commission Failed 39,703 (37.85%) 65,182 (62.15%)
Measure 14 A constitutional amendment allowing localities sixty years to make up for any indebtedness Failed 38,589 (37.18%) 65,206 (62.82%)
Measure 15 A constitutional amendment relating to the equalization of tax assessments Passed 55,987 (50.32%) 55,275 (49.68%)
Measure 16 An initiative introducing cost-saving measures for publicizing future ballot measures Failed 48,301 (46.19%) 56,259 (53.81%)

1916

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Ballot Measures from 1916
Measure name Description[25] Status[32] Yes votes No votes
Measure 1 A referendum upholding a law relating to medical practice regulation Passed 96,879 (54.06%) 82,317 (45.94%)
Measure 2 A constitutional amendment to codify the state civil service Failed 62,458 (39.28%) 96,561 (60.72%)
Measure 3 A constitutional amendment exempting beer from existing prohibitions on alcohol Failed 77,345 (32.16%) 163,134 (67.84%)
Measure 4 An initiative establishing treatment procedures for people with mental illnesses Passed 164,220 (80.64%) 39,415 (19.36%)
Measure 5 An initiative abolishing the Colorado Tax Commission and transferring its duties to the Colorado Board of Equalization Failed 80,362 (48.89%) 84,011 (51.11%)
Measure 6 An initiative relating to the regulation of livestock running Failed 85,279 (35.47%) 155,134 (64.53%)
Measure 7 An initiative allowing for the investment of public school funds Passed 102,956 (60.92%) 66,058 (39.08%)
Measure 8 An measure calling for a constitutional convention Failed 53,530 (43.48%) 69,579 (56.52%)

1918

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Ballot Measures from 1918
Measure name Description[25] Status[33] Yes votes No votes
Measure 1 An initiative providing public aid for blind adults Passed 131,469 (93.30%) 9,440 (6.70%)
Measure 2 A constitutional amendment codifying the state civil service Passed 75,301 (64.59%) 41,287 (35.41%)
Measure 3 An initiative strengthening existing alcohol prohibition Passed 113,636 (63.71%) 64,740 (36.29%)
Measure 4 A constitutional amendment limiting the time for state legislators to introduce bills from 25 days to 15 days Passed 67,693 (77.28%) 19,901 (22.72%)
Measure 5 A constitutional amendment relating to the publication of ballot measures before the election Passed 98,715 (88.97%) 12,237 (11.03%)

1920

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Ballot Measures from 1920
Measure name Description[25] Status[34] Yes votes No votes
Measure 1 An initiative establishing fixed hours for city fire department employees Passed 113,140 (57.80%) 82,596 (42.20%)
Measure 2 An initiative requiring the licensing and regulation of chiropractors Failed 84,286 (43.52%) 109,385 (56.48%)
Measure 3 An initiative creating a county called Limon County Failed 34,881 (19.81%) 141,239 (80.19%)
Measure 4 An initiative creating a county called Flagler County Failed 33,295 (19.17%) 140,363 (80.83%)
Measure 5 A constitutional amendment allowing the state to issue bonds for the purpose of building the Moffat, Monarch, and San Juan Tunnels Failed 101,841 (44.68%) 126,099 (55.32%)
Measure 6 An initiative allocating $350,000 for the creation of a Psychopathic Hospital and Laboratory (equivalent to $5,323,256 in 2023) Passed 155,049 (75.51%) 50,295 (24.49%)
Measure 7 A constitutional amendment creating a property tax for the purpose of funding state educational facilities Passed 160,268 (75.39%) 52,324 (24.61%)
Measure 8 A constitutional amendment authorizing the state to issue a $5,000,000 bond for the purpose of constructing new highways (equivalent to $76,046,512 in 2023) Passed 100,130 (58.51%) 70,997 (41.49%)
Measure 9 A constitutional amendment increasing the number of county judges Failed 35,095 (26.49%) 97,398 (73.51%)
Measure 10 A constitutional amendment increasing the salaries of constitutional offices and judges Failed 49,313 (30.40%) 112,878 (69.60%)

1922

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Ballot Measures from 1922
Measure name Description[25] Status[35] Yes votes No votes
Measure 1 A constitutional amendment allowing the state to issue $1,500,000 in bonds for the purpose of constructing new highways (equivalent to $27,304,175 in 2023) Passed 131,271 (66.36%) 66,536 (33.64%)
Measure 2 A constitutional amendment creating a public utilities commission Failed 75,061 (41.08%) 107,655 (58.92%)
Measure 3 An initiative reapportioning seats in the Colorado General Assembly Failed 61,502 (37.72%) 101,537 (62.28%)
Measure 4 A constitutional amendment allowing the legislature to issue some exemptions from the ad valorem tax and create an income tax Failed 42,466 (26.08%) 120,355 (73.92%)
Measure 5 An initiative relating to experimental operations on humans and animals Failed 35,476 (16.61%) 178,120 (83.39%)
Measure 6 A measure calling for a constitutional convention Failed 53,015 (36.29%) 93,081 (63.71%)
Measure 7 A constitutional amendment relating to the location and control of higher education institutions Passed 87,282 (59.95%) 58,315 (40.05%)
Measure 8 A constitutional amendment establishing four-year terms for some county officials Failed 37,945 (26.40%) 105,782 (73.60%)
Measure 9 A constitutional amendment establishing four-year terms for some state officials Failed 40,081 (28.54%) 100,367 (71.46%)
Measure 10 A constitutional amendment allowing the legislature to grant non-citizens the ability to own property Failed 43,074 (31.15%) 95,219 (68.85%)

1924

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Ballot Measures from 1924
Measure name Description[25] Status[36] Yes votes No votes
Measure 1 A constitutional amendment establishing a state printer and a printing building committee Failed 32,150 (12.48%) 225,505 (87.52%)
Measure 2 A constitutional amendment authorizing the state to issue bonds for the purpose of paying bonuses to military members Failed 91,510 (43.35%) 119,586 (56.65%)
Measure 3 A constitutional amendment allowing the legislature to set salaries for state officials Failed 67,230 (34.20%) 129,344 (65.80%)

1926

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Ballot Measures from 1926
Measure name Description[25] Status[37] Yes votes No votes
Measure 1 A constitutional amendment allowing the General Assembly to set salaries for state officials and judges Failed 95,625 (47.73%) 104,709 (52.27%)
Measure 2 A constitutional amendment allowing the General Assembly to set salaries for county officials Failed 60,086 (33.69%) 118,284 (66.31%)
Measure 3 A constitutional amendment allowing the legislature to modify vehicle registration fees Failed 68,459 (33.77%) 134,292 (66.23%)
Measure 5 A constitutional amendment allowing the General Assembly to regulate alcohol Failed 107,749 (41.06%) 154,672 (58.94%)
Measure 6 An initiative allowing dentists licensed in other states to practice in Colorado Failed 56,433 (23.59%) 182,816 (76.41%)
Measure 7 A constitutional amendment creating a public utilities commission Failed 35,137 (17.88%) 161,372 (82.12%)
Measure 8 An initiative creating a fuel tax and vehicle registration fees and mandating that all revenues be used exclusively for roads Failed 81,762 (35.98%) 145,482 (64.02%)

1928

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Ballot Measures from 1928
Measure name Description[25] Status[38] Yes votes No votes
Measure 1 A constitutional amendment allowing the General Assembly to set salaries for state officials and judges Passed 134,724 (53.09%) 119,060 (46.91%)
Measure 2 A constitutional amendment requiring that voters on issues related to school funding be property tax payers Failed 69,005 (30.80%) 155,018 (69.20%)
Measure 3 A constitutional amendment modifying eminent domain rules Failed 32,294 (16.97%) 157,973 (83.03%)
Measure 4 A constitutional amendment authorizing the state to issue $60,000,000 in bonds for the purpose of constructing new highways (equivalent to $1,064,651,163 in 2023) Failed 82,422 (32.16%) 173,881 (67.84%)
Measure 5 A constitutional amendment creating an elected Board of Education Failed 84,416 (34.84%) 157,889 (65.16%)

1930

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Ballot Measures from 1930
Measure name Description[25] Status[39] Yes votes No votes
Measure 1 A measure calling for a constitutional convention Failed 93,879 (48.97%) 97,826 (51.03%)
Measure 2 A constitutional amendment creating an elected Board of Education Failed 70,643 (32.05%) 149,770 (67.95%)

1932

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Ballot Measures from 1932
Measure name Description[25] Status[40] Yes votes No votes
Measure 1 A constitutional amendment making some county positions hold a four-year term Failed 102,117 (37.57%) 169,703 (62.43%)
Measure 2 A referendum upholding a law which increased the oleomargarine tax from 10 cents to 15 cents a pound Failed 134,313 (38.16%) 217,671 (61.84%)
Measure 3 An initiative reapportioning seats in the Colorado General Assembly Passed 162,871 (53.07%) 144,037 (46.93%)
Measure 4 A constitutional amendment allowing the General Assembly to create a graduated income tax Failed 85,573 (27.49%) 225,713 (72.51%)
Measure 5 A constitutional amendment allowing the General Assembly to create a limited income tax Failed 101,438 (32.11%) 214,464 (67.89%)
Measure 6 A constitutional amendment limiting fuel taxes Failed 124,610 (33.37%) 248,801 (66.63%)
Measure 7 A constitutional amendment repealing the statewide alcohol prohibition Passed 233,311 (56.07%) 182,771 (43.93%)

1934

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Ballot Measures from 1934
Measure name Description[25] Status[41] Yes votes No votes
Measure 1 A constitutional amendment centralizing most authority with the Governor of Colorado Failed 102,117 (37.57%) 169,703 (62.43%)
Measure 2 A constitutional amendment relating to civil service reform Failed 60,745 (24.02%) 192,140 (75.98%)
Measure 3 A constitutional amendment eliminating uniform taxation Failed 107,457 (39.98%) 161,952 (60.11%)
Measure 4 A constitutional amendment granting voters authority to approve new taxes Failed 126,649 (45.93%) 149,098 (54.07%)
Measure 5 A constitutional amendment requiring that taxes related to gasoline and vehicles be allocated exclusively for roads Passed 160,482 (54.68%) 132,994 (45.32%)
Measure 6 A constitutional amendment limiting fuel taxes to 3 cents Failed 87,090 (31.69%) 187,720 (68.31%)
Measure 7 An initiative to requiring chain stores to pay license fees Passed 197,144 (55.80%) 156,147 (44.20%)

1936

[edit]
Ballot Measures from 1936
Measure name Description[25] Status[42] Yes votes No votes
Measure 1 A constitutional amendment establishing an ownership tax on motor vehicles Passed 218,795 (66.90%) 108,270 (33.10%)
Measure 2 An initiative providing public assistance to sufferers of tuberculosis below a certain income level Passed 176,872 (56.98%) 133,516 (43.02%)
Measure 3 A constitutional amendment limiting tax rates based on the size of a town Failed 60,228 (17.52%) 283,583 (82.48%)
Measure 4 A constitutional amendment allowing the General Assembly to establish an income tax Failed 67,155 (20.40%) 262,022 (79.60%)
Measure 5 A constitutional amendment providing a pension of $45 a month to the elderly (equivalent to $988 in 2023) Passed 239,289 (64.04%) 134,377 (35.96%)
Measure 6 An initiative modifying the laws relating to worker's compensation Passed 203,195 (63.91%) 114,733 (36.09%)
Measure 7 A constitutional amendment allowing women to serve on juries Failed 129,872 (41.35%) 184,204 (58.65%)
Measure 8 A constitutional amendment allowing the general assembly to establish a graduated income tax Passed 167,268 (51.24%) 159,143 (48.76%)
Measure 9 A constitutional amendment exempting churches, schools, and cemeteries from property tax Passed 227,254 (67.16%) 111,123 (32.84%)

1938

[edit]
Ballot Measures from 1938
Measure name Description[25] Status[25] Yes votes No votes
Measure 1 A constitutional amendment giving healthcare practitioners the authority to self-regulate Failed 94,846 (23.13%) 315,174 (76.87%)
Measure 2 A constitutional amendment repealing the $45 a month pension and granting the legislature authority to set pensions Failed 157,975 (36.52%) 274,598 (63.48%)
Measure 3 An initiative repealing the license fees for chain stores Failed 167,109 (38.70%) 264,700 (61.30%)

1940

[edit]
Ballot Measures from 1940
Measure name Description[25] Status[43] Yes votes No votes
Measure 1 A constitutional amendment establishing property tax on all intangible property Failed 50,806 (10.35%) 440,202 (89.65%)
Measure 2 An initiative to establish a racing commission to oversee horse and dog racing Failed 203,195 (42.28%) 277,392 (57.72%)
Measure 3 A constitutional amendment establishing a game and fish commission Failed 196,907 (41.92%) 272,768 (58.08%)
Measure 4 A constitutional amendment modifying the General Assembly's ability relating to income taxes Failed 81,787 (18.26%) 366,049 (81.74%)
Measure 5 A constitutional amendment lowering the elderly's pension to $30 a month (equivalent to $652 in 2023) Failed 138,383 (27.85%) 358,582 (72.15%)

1942

[edit]
Ballot Measures from 1942
Measure name Description[25] Status[44] Yes votes No votes
Measure 1 A constitutional amendment limiting the session length of General Assembly meetings Failed 72,147 (49.49%) 73,648 (50.51%)

1944

[edit]
Ballot Measures from 1944
Measure name Description[25] Status[45] Yes votes No votes
Measure 1 A constitutional amendment allowing women to serve on juries Passed 195,793 (60.65%) 127,057 (39.35%)
Measure 2 A constitutional amendment allowing some foreigners the ability to purchase property Failed 173,652 (47.01%) 195,752 (52.99%)
Measure 3 An initiative appropriating $1,500,000 in funding for old age pensions (equivalent to $25,962,193 in 2023) Passed 195,793 (60.65%) 127,057 (39.35%)
Measure 4 A constitutional amendment granting veterans and their widows preference in the civil service Passed 256,563 (70.55%) 107,100 (29.45%)

1946

[edit]
Ballot Measures from 1946
Measure name Description[25] Status[46] Yes votes No votes
Measure 1 A constitutional amendment allowing for secret ballots Passed 118,470 (56.23%) 92,203 (43.77%)
Measure 2 A constitutional amendment requiring that any balance in the state pension fund roll-over each year Failed 96,787 (36.38%) 169,243 (63.62%)

1948

[edit]
Ballot Measures from 1948
Measure name Description[25] Status[47] Yes votes No votes
Measure 1 A constitutional amendment reorganizing the Colorado Department of Education Passed 238,100 (65.03%) 128,054 (34.97%)
Measure 2 An initiative establishing regulations for animal racing Passed 238,371 (56.50%) 183,292 (43.50%)
Measure 3 A constitutional amendment allowing localities to prohibit alcohol Failed 334,331 (73.46%) 120,799 (26.54%)
Measure 4 A constitutional amendment increasing the old age pension to $55 a month (equivalent to $697 in 2023) Failed 120,799 (26.54%) 334,331 (73.46%)

1950–1999

[edit]

1950

[edit]
Ballot Measures from 1950
Measure name Description[25] Status[48] Yes votes No votes
Measure 1 A constitutional amendment modifying home rule for some localities Passed 145,780 (61.39%) 91,700 (38.61%)
Measure 2 A constitutional amendment modifying some rules relating to the General Assembly Passed 134,048 (58.09%) 96,709 (41.91%)
Measure 3 A constitutional amendment exempting some members of executive departments from the civil service Failed 103,848 (33.26%) 208,408 (66.74%)

1952

[edit]
Ballot Measures from 1952
Measure name Description[25] Status[49] Yes votes No votes
Measure 1 A constitutional amendment modifying salaries and retirement procedures for judges Passed 223,365 (58.28%) 159,883 (41.72%)
Measure 2 A constitutional amendment modifying public utilities regulations Failed 173,652 (46.01%) 203,732 (53.99%)
Measure 3 A constitutional amendment exempting some forms of property from tax Failed 96,584 (25.67%) 279,682 (74.33%)
Measure 4 A constitutional amendment creating a severance tax on some gasoline products Failed 177,125 (35.96%) 315,392 (64.04%)
Measure 5 An initiative prohibiting firefighters from working more than 60 hours a week Failed 169,126 (38.84%) 266,275 (61.16%)
Measure 6 A constitutional amendment legalizing slot machines Failed 152,570 (31.98%) 324,548 (68.02%)

1954

[edit]
Ballot Measures from 1954
Measure name Description[50] Status[51] Yes votes No votes
Amendment 1 A constitutional amendment granting the public utilities commission regulatory authority Passed 229,175 (64.90%) 123,932 (35.10%)
Amendment 2 A constitutional amendment excluding the Director of the Water Conservation Board from civil service Failed 133,073 (45.44%) 159,800 (54.56%)
Amendment 3 A constitutional amendment setting elected state officials terms at four years Failed 123,112 (44.18%) 155,539 (55.82%)
Amendment 4 A constitutional amendment requiring income deductions from old age pensions Failed 104,079 (31.73%) 223,965 (68.27%)
Amendment 5 A constitutional amendment reapportioning the General Assembly Failed 116,695 (42.30%) 159,188 (57.70%)
Referendum 6 An initiative allowing for anticipation warrants for highway purposes Passed 177,697 (57.26%) 132,628 (42.74%)
Amendment 7 A constitutional amendment modifying personal property taxation Failed 143,486 (49.14%) 148,517 (50.86%)
Amendment 8 A constitutional amendment setting county officials terms at four years Passed 168,055 (52.63%) 151,271 (47.37%)

1956

[edit]
Ballot Measures from 1956
Measure name Description[52] Status[53] Yes votes No votes
Amendment 1 A constitutional amendment setting elected state officials terms at four years Passed 316,611 (62.22%) 192,267 (37.78%)
Amendment 2 A constitutional amendment exempting some personal effects from taxation Passed 320,134 (61.97%) 196,423 (38.03%)
Amendment 3 A constitutional amendment modifying the merit system for civil service Failed 156,077 (31.82%) 334,498 (68.18%)
Amendment 4 A constitutional amendment reapportioning the General Assembly Failed 158,204 (31.18%) 349,195 (68.82%)
Amendment 5 A constitutional amendment raising the old age pension to $100 a month and means-testing it (equivalent to $1,121 in 2023) Passed 364,961 (65.72%) 190,366 (34.28%)

1958

[edit]
Ballot Measures from 1958
Measure name Description[54] Status[55] Yes votes No votes
Amendment 1 A constitutional amendment modifying the civil service to make it more competitive Failed 218,426 (48.52%) 231,725 (51.48%)
Amendment 2 A constitutional amendment modifying the salaries for county and precinct officers Failed 146,328 (36.65%) 252,903 (63.35%)
Amendment 3 A constitutional amendment modifying county governments Failed 158,666 (39.64%) 241,636 (60.36%)
Amendment 4 A constitutional amendment legalizing nonprofit lotteries, bingo games, and raffles Passed 244,929 (50.98%) 235,482 (49.02%)
Amendment 5 A constitutional amendment establishing rules for labor union membership Failed 200,319 (38.61%) 318,480 (61.39%)

1960

[edit]
Ballot Measures from 1960
Measure name Description[56] Status[57] Yes votes No votes
Proposal 1 A constitutional amendment modifying the civil service Failed 214,956 (38.57%) 342,352 (61.43%)
Proposal 2 A constitutional amendment modifying the election process for county officials Failed 231,025 (41.31%) 328,241 (58.69%)
Proposal 3 A constitutional amendment creating a department of wildlife conservation Failed 190,366 (31.24%) 419,048 (68.76%)
Proposal 4 An initiative establishing daylight saving time Failed 280,115 (45.46%) 336,033 (54.54%)
Proposal 5 A constitutional amendment imposing a sales tax on all items except drugs and food Failed 200,566 (33.20%) 403,470 (66.80%)
Proposal 7 An initiative exempting some governor appointees from civil service Failed 170,736 (28.40%) 430,394 (71.60%)

1962

[edit]
Ballot Measures from 1962
Measure name Description[58] Status[59] Yes votes No votes
Proposal 1 A constitutional amendment reorganizing the judicial department Passed 303,740 (64.24%) 169,052 (35.76%)
Proposal 2 A constitutional amendment modifying Denver city and county officers Failed 157,249 (38.20%) 254,354 (61.80%)
Proposal 3 A constitutional amendment redefining "income" for state purposes Passed 231,784 (53.46%) 201,795 (46.54%)
Proposal 4 A constitutional amendment establishing minimum voter qualifications Passed 303,942 (68.88%) 137,323 (31.12%)
Proposal 5 A constitutional amendment modifying property tax assessment procedures Passed 215,413 (50.34%) 212,477 (49.66%)
Proposal 6 A constitutional amendment changing term lengths for county officials Failed 207,442 (49.83%) 208,867 (50.17%)
Proposal 7 A constitutional amendment reapportioning the General Assembly Passed 305,700 (63.90%) 172,725 (36.10%)
Proposal 8 A constitutional amendment creating a reapportionment commission Failed 149,822 (32.46%) 311,749 (67.54%)

1964

[edit]
Ballot Measures from 1964
Measure name Description[60] Status[61] Yes votes No votes
Proposal 1 A constitutional amendment creating a state auditor under the legislature Passed 304,066 (63.71%) 173,221 (36.29%)
Proposal 2 A constitutional amendment allowing voters to abolish their County Superintendent's office Passed 308,049 (63.38%) 177,967 (36.62%)

1966

[edit]
Ballot Measures from 1966
Measure name Description[62] Status[63] Yes votes No votes
Amendment 1 A constitutional amendment limiting the number of executive departments at the state level to no more than 20 Passed 369,366 (69.51%) 162,038 (30.49%)
Amendment 2 A constitutional amendment creating an ownership tax on motor vehicles Passed 318,102 (60.10%) 211,177 (39.90%)
Amendment 3 A constitutional amendment creating the Colorado Commission on Judicial Qualifications Passed 293,771 (52.90%) 261,558 (47.10%)
Amendment 4 A constitutional amendment establishing a 35 member Senate and a 65 member House of Representatives Passed 374,884 (70.34%) 158,067 (29.66%)
Amendment 5 A constitutional amendment establishing a limit on property tax increases Failed 178,245 (31.55%) 386,650 (68.45%)
Referred Law 1 An initiative establishing daylight saving time Passed 346,274 (57.26%) 258,490 (42.74%)
Refereed Law 2 An initiative abolishing the death penalty Failed 193,245 (33.15%) 389,707 (66.85%)

1968

[edit]
Ballot Measures from 1968
Measure name Description[64] Status[65] Yes votes No votes
Amendment 1 A constitutional amendment requiring the Governor and Lieutenant Governor be elected jointly Passed 428,522 (67.73%) 204,186 (32.27%)
Amendment 2 A constitutional amendment exempting some property from taxation Failed 284,404 (47.93%) 308,915 (52.07%)
Amendment 3 A constitutional amendment modifying the salaries of county officials Passed 307,356 (51.50%) 288,873 (48.50%)

1970

[edit]
Ballot Measures from 1970
Measure name Description[66] Status[67] Yes votes No votes
Amendment 1 A constitutional amendment exempting department heads from civil service Passed 293,621 (57.21%) 219,639 (42.89%)
Amendment 2 A constitutional amendment modifying the merit system for state employment Passed 346,663 (66.40%) 175,076 (33.60%)
Amendment 3 A constitutional amendment allowing counties to have home rule Passed 325,512 (65.56%) 170,986 (34.44%)
Amendment 4 A constitutional amendment reducing the age and residency requirements for voting Failed 240,622 (45.19%) 291,858 (54.81%)
Amendment 5 A constitutional amendment modifying residency requirements for voting Passed 336,977 (64.60%) 184,694 (35.40%)

1972

[edit]
Ballot Measures from 1972
Measure name Description[68] Status[69] Yes votes No votes
Measure 1 An initiative to legalize sweepstakes races Failed 408,704 (49.49%) 417,149 (50.51%)
Measure 2 A constitutional amendment creating a state student loan program Passed 443,660 (54.13%) 375,948 (45.87%)
Measure 3 A constitutional amendment codifying a right to gender equality Passed 531,415 (64.28%) 295,254 (35.72%)
Measure 4 A constitutional amendment modifying the structure of the University of Colorado's Board of Regents Passed 418,825 (52.00%) 386,645 (48.00%)
Measure 5 A constitutional amendment allowing the salaries of elected officials to change while they are in office Failed 233,678 (29.04%) 571,083 (70.96%)
Measure 6 A constitutional amendment allowing for a private lottery hosted by the United States Sweepstakes Corporation Failed 161,281 (19.93%) 647,817 (80.06%)
Measure 7 A constitutional amendment limiting property taxes Failed 192,913 (23.53%) 627,007 (76.47%)
Measure 8 A constitutional amendment preventing the state from instituting new taxes or loaning money for the 1976 Winter Olympics Passed 514,228 (59.44%) 350,964 (40.56%)
Measure 9 An initiative instituting new transparency requirements for public officials Passed 491,073 (60.11%) 325,819 (39.89%)
Measure 10 An initiative creating a regulatory agency to govern utility rates Failed 350,264 (42.80%) 468,154 (57.20%)
Measure 11 An initiative requiring drivers to hold vehicle insurance Failed 208,155 (25.89%) 595,887 (74.11%)
Measure 12 A constitutional amendment limiting property taxes Failed 167,882 (21.09%) 628,201 (78.91%)

1974

[edit]
Ballot Measures from 1974
Measure name Description[70] Status[71] Yes votes No votes
Amendment 1 A constitutional amendment requiring county territory changes be approved by voters Passed 409,174 (58.35%) 292,040 (41.65%)
Amendment 2 An initiative imposing the death penalty on people convicted of class 1 felonies Passed 451,403 (61.15%) 286,805 (38.85%)
Amendment 3 A constitutional amendment requiring regular reports by the State Treasurer Passed 425,505 (63.26%) 247,141 (36.74%)
Amendment 4 A constitutional amendment allowing localities to invest in energy sector corporations Passed 481,513 (82.75%) 100,360 (17.25%)
Amendment 5 A constitutional amendment creating a commission to govern Denver's growth Passed 397,442 (61.17%) 252,256 (38.83%)
Amendment 6 A constitutional amendment modifying the functions of the executive and legislative departments Passed 386,284 (59.96%) 257,967 (40.04%)
Amendment 7 A constitutional amendment modifying the aviation fuel tax Passed 375,390 (56.13%) 293,430 (43.87%)
Amendment 8 A constitutional amendment prohibiting forced busing Passed 485,536 (68.74%) 220,842 (31.26%)
Amendment 9 A constitutional amendment creating the Colorado Reapportionment Commission Passed 386,725 (60.20%) 255,725 (39.80%)
Amendment 10 A constitutional amendment requiring voter approval before nuclear detonations Passed 399,818 (57.85%) 291,284 (42.15%)

1976

[edit]
Ballot Measures from 1976
Measure name Description[72] Status[73] Yes votes No votes
Measure 1 An initiative authorizing some sweepstakes races Passed 522,068 (50.53%) 511,135 (49.47%)
Measure 2 A constitutional amendment modifying the way motor vehicles are categorized for tax purposes Passed 627,562 (61.75%) 388,666 (38.25%)
Measure 3 A constitutional amendment requiring a two-thirds vote in the legislature before the construction of a nuclear power plant Failed 305,142 (29.34%) 734,843 (70.66%)
Measure 4 A constitutional amendment exempting some state government officials from the standard personnel system Failed 237,853 (23.63%) 768,687 (76.37%)
Measure 5 A constitutional amendment allowing county commissioners to modify other elected officials' salaries Failed 376,386 (37.43%) 629,136 (62.57%)
Measure 6 A constitutional amendment revoking the right to gender equality Failed 401,943 (38.99%) 629,060 (61.01%)
Measure 7 An initiative exempting food from sales tax Failed 406,311 (38.87%) 639,058 (61.13%)
Measure 8 An initiative requiring the recycling of beverage containers Failed 346,335 (33.03%) 702,292 (66.97%)
Measure 9 An initiative creating a department to represent public utility customers in government meetings Failed 304,594 (39.97%) 711,627 (70.03%)
Measure 10 A constitutional amendment requiring voter approval of all taxes Failed 259,201 (25.25%) 767,157 (74.75%)

1978

[edit]
Ballot Measures from 1978
Measure name Description[74] Status[75] Yes votes No votes
Amendment 1 A constitutional amendment clarifying the procedure for replacing county commissioners who resign during their term Passed 442,071 (66.13%) 226,432 (33.87%)
Amendment 2 A constitutional amendment limiting state spending Failed 295,616 (41.27%) 420,759 (58.73%)

1980

[edit]
Ballot Measures from 1980
Measure name Description[76] Status[77] Yes votes No votes
Amendment 1 A constitutional amendment requiring that measure petition signers also be registered voters Passed 638,731 (60.14%) 423,322 (39.86%)
Amendment 2 A constitutional amendment creating a state-run lottery Passed 660,213 (59.83%) 443,289 (40.17%)
Amendment 3 A constitutional amendment allowing towns and cities to annex unincorporated areas with voter approval Passed 601,302 (56.65%) 460,084 (34.35%)
Amendment 4 A constitutional amendment relating to real estate sales Failed 381,821 (33.87%) 745,625 (66.13%)
Amendment 5 A constitutional amendment allowing banks to open additional branches Failed 292,323 (25.58%) 850,454 (74.42%)
Amendment 6 A constitutional amendment restructuring the regional transportation district's board Passed 570,049 (56.17%) 444,902 (43.83%)

1982

[edit]
Ballot Measures from 1982
Measure name Description[78] Status[79] Yes votes No votes
Amendment 1 A constitutional amendment modifying property tax assessments Passed 551,334 (65.49%) 290,590 (34.51%)
Amendment 2 A constitutional amendment allowing bail to be denied to people accused of capital offenses Passed 737,813 (82.52%) 156,336 (17.48%)
Amendment 3 A constitutional amendment establishing a system for judicial discipline Passed 659,905 (77.33%) 193,425 (22.67%)
Amendment 4 A constitutional amendment modifying some legislative procedures Passed 442,601 (54.27%) 372,897 (45.73%)
Amendment 5 An initiative requiring beverage containers to have a minimum refund value Failed 242,653 (25.51%) 708,564 (75.45%)
Amendment 6 A constitutional amendment ending nuclear weapons production Failed 325,985 (36.60%) 564,606 (63.40%)
Amendment 7 An initiative allowing grocery stores to sell wines with alcohol contents below 14% Failed 333,467 (35.00%) 620,190 (65.00%)

1984

[edit]
Ballot Measures from 1984
Measure name Description[80] Status[81] Yes votes No votes
Amendment 1 A constitutional amendment creating the office of the Commissioner of Insurance Passed 641,587 (58.81%) 449,362 (41.19%)
Amendment 2 A constitutional amendment requiring voter registration for all election types Passed 811,130 (72.73%) 304,208 (27.27%)
Amendment 3 A constitutional amendment prohibiting the use of state funds for abortion Passed 627,343 (50.39%) 617,637 (49.61%)
Amendment 4 An initiative allowing voter registration alongside driver's license applications Passed 705,725 (61.18%) 447,803 (38.82%)
Amendment 5 A constitutional amendment allowing some forms of casino gambling Failed 406,989 (33.18%) 819,533 (66.82%)

1986

[edit]
Ballot Measures from 1986
Measure name Description[82] Status[83] Yes votes No votes
Amendment 1 A constitutional amendment modifying the merit system for state employment Failed 461,004 (48.57%) 488,226 (51.43%)
Amendment 2 A constitutional amendment allowing county commissioners to modify other elected officials salaries Failed 406,960 (45.24%) 492,511 (54.76%)
Amendment 3 A constitutional amendment requiring that home rule municipalities abide by an initiative and referendum system Passed 455,053 (53.42%) 396,738 (46.58%)
Amendment 4 A constitutional amendment preventing new taxes without voter approval Failed 375,097 (37.50%) 625,158 (62.50%)

1988

[edit]
Ballot Measures from 1988
Measure name Description[84] Status[85] Yes votes No votes
Amendment 1 A constitutional amendment making English the official state language Passed 829,617 (61.15%) 527,053 (38.85%)
Amendment 2 A constitutional amendment modifying expenses reimbursements Passed 645,002 (53.93%) 551,118 (46.07%)
Amendment 3 A constitutional amendment restricting General Assembly sessions to no more than 120 days Passed 641,363 (52.33%) 584,359 (47.77%)
Amendment 4 A constitutional amendment creating an eight-hour workday, modifying age qualifications to vote, and repealing some obsolete provisions Passed 799,250 (67.21%) 389,906 (32.79%)
Amendment 5 A constitutional amendment exempting some forms of property from taxation Passed 624,021 (51.90%) 578,295 (48.10%)
Amendment 6 A constitutional amendment requiring voter approval for new taxes Failed 567,884 (42.19%) 778,075 (57.81%)
Amendment 7 A constitutional amendment allowing state funds to be used for abortion Failed 534,070 (39.76%) 809,078 (60.24%)
Amendment 8 A constitutional amendment modifying some General Assembly procedures Passed 852,448 (71.96%) 332,159 (28.04%)

1990

[edit]
Ballot Measures from 1990
Measure name Description[86] Status[87] Yes votes No votes
Amendment 1 A constitutional amendment requiring voter approval for some tax increases Failed 494,934 (48.93%) 516,534 (51.07%)
Amendment 2 A referendum modifying the presidential primary system Passed 582,835 (61.16%) 370,166 (38.84%)
Amendment 3 A constitutional amendment repealing some obsolete provisions Passed 717,544 (77.84%) 204,294 (22.16%)
Amendment 4 A constitutional amendment allowing limited gambling in Black Hawk, Central, and Cripple Creek cities Passed 574,620 (57.31%) 428,096 (42.39%)
Amendment 5 A constitutional amendment instituting term limits for most statewide elected officials Passed 708,975 (70.99%) 289,664 (29.01%)

1992

[edit]
Ballot Measures from 1992
Measure name Description[88] Status[89] Yes votes No votes
Amendment 1 A constitutional amendment establishing a Taxpayer Bill of Rights (TABOR) Passed 812,308 (53.68%) 700,906 (46.32%)
Amendment 2 A constitutional amendment prohibiting local governments for granted protected status to sexual orientation Passed 813,966 (53.41%) 710,151 (46.59%)
Amendment 3 A constitutional amendment authorizing some forms of gambling in a variety of cities and counties Failed 448,779 (29.74%) 1,060,168 (70.26%)
Amendment 4 A constitutional amendment authorizing some forms of gambling in a variety of cities and counties Failed 414,699 (27.61%) 1,087,136 (72.39%)
Amendment 5 A constitutional amendment authorizing some forms of gambling in Parachute Failed 414,489 (27.59%) 1,087,713 (72.41%)
Amendment 6 An initiative requiring state-wide educational standards, testing, and implementing a wide variety of school funding reforms Failed 693,231 (45.61%) 826,787 (54.39%)
Amendment 7 A constitutional amendment creating a voucher program for schools Failed 503,162 (33.21%) 1,011,901 (55.79%)
Amendment 8 A constitutional amendment creating the Great Outdoors Colorado Program Passed 876,424 (58.20%) 629,490 (41.80%)
Amendment 9 A constitutional amendment allowing limited gambling in the Central Platte Valley Failed 292,961 (19.62%) 1,200,336 (80.38%)
Amendment 10 An initiative banning the use of bait and dogs in black bear hunting Passed 1,054,032 (69.70%) 458,260 (30.30%)
Referendum A A constitutional amendment establishing victim rights Passed 1,139,427 (80.18%) 281,731 (19.82%)
Referendum B A constitutional amendment repealing some obsolete provisions Passed 1,081,463 (78.02%) 304,718 (21.98%)
Referendum C A constitutional amendment allowing for limited gambling in localities with voter approval Passed 1,075,649 (76.01%) 339,521 (23.99%)

1993

[edit]
Ballot Measures from 1993
Measure name Description[90] Status[91] Yes votes No votes
Referendum A An initiative establishing a sales tax on tourist-related items for the purpose of funding tourism marketing Failed 274,989 (44.82%) 338,546 (55.18%)

1994

[edit]
Ballot Measures from 1994
Measure name Description[92] Status[91] Yes votes No votes
Amendment 1 A constitutional amendment increasing the cigarette tax rate to 50% Failed 429,847 (38.53%) 685,860 (61.47%)
Amendment 11 A constitutional amendment increasing the benefits of worker's compensation insurance Failed 369,741 (33.59%) 730,963 (66.41%)
Amendment 12 A constitutional amendment substantially modifying campaign contribution rules Failed 246,723 (22.53%) 848,140 (77.47%)
Amendment 13 A constitutional amendment allowing airports to host slot machines and allowing limited gambling in Manitou Springs Failed 90,936 (8.28%) 1,007,557 (91.72%)
Amendment 15 A constitutional amendment requiring that at least 60% of candidate contributions come from individuals rather than organizations Failed 508,029 (46.35%) 588,072 (53.65%)
Amendment 16 A constitutional amendment preventing the state judiciary from restricting freedom of speech past existing federal precedent Failed 404,156 (36.73%) 696,040 (63.27%)
Amendment 17 A constitutional amendment placing term limits on a variety of public offices Passed 554,238 (51.05%) 531,521 (48.95%)
Amendment 18 A constitutional amendment relating to financial responsibility for medical assistance Failed 334,029 (31.85%) 714,653 (68.15%)
Referendum A A constitutional amendment requiring that ballot measures placed via petition be confined to a single subject Passed 687,527 (65.68%) 359,298 (34.32%)
Referendum B A constitutional amendment requiring the publication of a nonpartisan voter information pamphlet every election Passed 529,749 (50.44%) 520,438 (49.56%)
Referendum C A constitutional amendment denying bail to people accused of violent felonies Passed 822,632 (76.93%) 246,726 (23.07%)

1995

[edit]
Ballot Measures from 1995
Measure name Description[93] Status[94] Yes votes No votes
Referendum A A referendum allowing the state to incur debt for the purposes of funding prisons Failed 291,736 (45.11%) 355,031 (54.89%)

1996

[edit]
Ballot Measures from 1996
Measure name Description[95] Status[94] Yes votes No votes
Amendment 11 A constitutional amendment eliminating many property tax exemptions Failed 242,543 (16.68%) 1,211,637 (83.32%)
Amendment 12 A constitutional amendment setting term limits for many public offices and proposing a federal amendment to the same effect Passed 768,257 (54.01%) 654,124 (45.99%)
Amendment 13 A constitutional amendment modifying the ballot measure process Failed 435,995 (31.07%) 967,266 (68.93%)
Amendment 14 A constitutional amendment prohibiting leghold traps, body-gripping traps, poisons, and snares for hunting Passed 752,413 (52.10%) 691,733 (47.90%)
Amendment 15 An initiative limiting political campaign contributions Passed 928,148 (65.79%) 482,551 (34.21%)
Amendment 16 A constitutional amendment modifying some rules relating to state lands held in trust Passed 708,502 (51.92%) 656,095 (48.08%)
Amendment 17 A constitutional amendment specifying that parents have the right to control their children's upbringing, education, values, and discipline Failed 615,202 (42.35%) 837,606 (57.65%)
Amendment 18 A constitutional amendment allowing some forms of gambling in Trinidad Failed 440,173 (31.46%) 958,991 (68.54%)
Referendum A A constitutional amendment requiring that proposed constitutional amendments reach a 60% vote threshold to pass Failed 544,543 (40.89%) 787,134 (59.11%)
Referendum B A constitutional amendment lengthening the time between the mailing of voter information pamphlets and ballots Passed 739,435 (54.87%) 608,219 (45.13%)
Referendum C A constitutional amendment authorizing the General Assembly to regulate county sheriff's offices Passed 754,339 (56.10%) 590,402 (43.90%)
Referendum D A constitutional amendment modifying unemployment compensation insurance Failed 376,860 (29.32%) 908,476 (70.68%)

1997

[edit]
Ballot Measures from 1997
Measure name Description[96] Status[97] Yes votes No votes
Amendment 1 A constitutional amendment raising the fuel tax and vehicle registration fees for the purpose of funding the Transportation Department Failed 109,663 (15.79%) 585,055 (84.21%)

1998

[edit]
Ballot Measures from 1998
Measure name Description[98] Status[97] Yes votes No votes
Amendment 11 A constitutional amendment prohibiting partial-birth abortions Failed 617,977 (48.52%) 617,977 (51.48%)
Amendment 12 An initiative requiring parental notification before an abortion is performed on an emancipated minor Passed 707,021 (54.87%) 581,481 (45.13%)
Amendment 13 A constitutional amendment requiring uniform application of livestock laws Failed 475,664 (38.70%) 753,509 (61.30%)
Amendment 14 An initiative increasing regulations of commercial hog farms Passed 790,825 (64.21%) 440,766 (35.79%)
Amendment 15 An initiative requiring that water flow meters in the San Luis Valley be certified by the state engineer Failed 292,977 (23.83%) 936,698 (76.17%)
Amendment 16 A constitutional amendment instituting fees on water pumped from state lands in the Rio Grande Water Conservation District Failed 297,872 (24.23%) 931,566 (75.77%)
Amendment 17 A constitutional amendment granting a tax credit to the parents of schoolchildren Failed 515,942 (39.72%) 782,982 (60.28%)
Amendment 18 A constitutional amendment allowing candidates for public office to submit declarations of voluntary term limits Passed 613,557 (50.41%) 603,651 (49.59%)
Referendum A A constitutional amendment relating to healthcare Failed 505,903 (45.32%) 610,449 (54.68%)
Referendum B An initiative allowing the state to hold up to $200,000,000 in excess tax revenue for the purpose of funding school construction and transportation (equivalent to $373,866,884 in 2023) Failed 477,504 (38.41%) 765,654 (61.59%)
Referendum C A constitutional amendment creating the city and county of Broomfield Passed 670,781 (61.29%) 423,603 (38.71%)

1999

[edit]
Ballot Measures from 1999
Measure name Description[99] Status[97] Yes votes No votes
Referendum A A referendum allowing the state to take on additional debt for the purpose of funding transportation projects Passed 477,982 (61.68%) 296,971 (38.32%)

2000–present

[edit]

2000

[edit]
Ballot Measures from 2000
Measure name Description[100] Status[101] Yes votes No votes
Amendment 20 A constitutional amendment legalizing medical marijuana Passed 915,527 (53.53%) 786,983 (46.47%)
Amendment 21 A constitutional amendment introducing small tax cuts Failed 569,788 (33.98%) 1,107,155 (66.02%)
Amendment 22 An initiative requiring background checks on gun purchases at gun shows Passed 1,197,593 (70.05%) 512,084 (29.95%)
Amendment 23 A constitutional amendment modifying public school funding Passed 882,628 (52.71%) 791,934 (47.29%)
Amendment 24 A constitutional amendment requiring voter approval for local government development plans Failed 511,885 (30.11%) 1,888,138 (69.89%)
Amendment 25 A constitutional amendment requiring a 24-hour waiting period before abortions Failed 664,420 (39.44%) 1,020,029 (60.56%)
Referendum A A constitutional amendment establishing a homestead tax exemption for senior citizens Passed 843,620 (54.74%) 697,398 (45.26%)
Referendum B A constitutional amendment modifying the timeframe for adoption of a redistricting plan for the General Assembly Passed 852,098 (60.48%) 556,769 (39.52%)
Referendum C A constitutional amendment modifying the selection process for county surveyors Failed 661,704 (45.45%) 794,310 (54.55%)
Referendum D A constitutional amendment removing some outdated provisions Passed 1,063,345 (71.56%) 422,629 (28.44%)
Referendum E An initiative allowing Colorado to enter multi-state lotteries Passed 836,390 (51.64%) 783,275 (48.36%)
Referendum F An initiative allowing the state to utilize excess state revenues for the purpose of funding school performance grants Failed 697,673 (44.11%) 887,947 (55.89%)

2001

[edit]
Ballot Measures from 2001
Measure name Description[102] Status[103] Yes votes No votes
Amendment 26 An initiative allowing the state to spend $50,000,000 for the purpose of improving Interstate 70 (equivalent to $86,036,459 in 2023) Failed 283,184 (34.10%) 547,213 (65.90%)
Referendum A An initiative increasing the outdoor recreation trust fund by $115,000,000 (equivalent to $197,883,856 in 2023) Passed 478,501 (57.58%) 352,585 (42.42%)

2002

[edit]
Ballot Measures from 2002
Measure name Description[25] Status[103] Yes votes No votes
Amendment 27 A constitutional amendment limiting corporation and labor union contributions to political campaigns Passed 890,390 (66.50%) 448,599 (33.50%)
Amendment 28 An initiative requiring voting by mail Failed 557,573 (42.41%) 757,299 (57.59%)
Amendment 29 An initiative substantially modifying the candidate selection process for primary elections Failed 509,109 (39.84%) 768,683 (60.14%)
Amendment 30 A constitutional amendment allowing same-day voter registration Failed 530,442 (39.25%) 821,050 (60.75%)
Amendment 31 A constitutional amendment prohibiting bilingual education in most circumstances Failed 608,264 (43.78%) 781,016 (56.22%)
Referendum A A constitutional amendment eliminating term limits for district attorneys Failed 461,848 (35.27%) 847,602 (64.73%)
Referendum B A constitutional amendment allowing localities to co-own healthcare facilities with private companies Failed 510,209 (40.76%) 741,568 (59.24%)
Referendum C A constitutional amendment allowing the General Assembly to regulate the position of county coroner Passed 900,611 (70.92%) 369,351 (29.08%)
Referendum D A constitutional amendment removing some obsolete provisions Passed 899,914 (71.89%) 351,886 (28.11%)
Referendum E A referendum establishing March 31 as "Cesar Chavez Day" Failed 275,947 (20.61%) 1,062,780 (79.39%)

2003

[edit]
Ballot Measures from 2003
Measure name Description[104] Status[105] Yes votes No votes
Amendment 32 A constitutional amendment modifying property tax assessment Failed 203,449 (22.45%) 702,829 (77.55%)
Amendment 33 A constitutional amendment allowing some limited forms of gambling Failed 180,959 (19.09%) 766,893 (80.91%)
Referendum A An referendum allowing the state to borrow up to $2,000,000,000 to fund water projects (equivalent to $3,312,590,449 in 2023) Failed 307,412 (32.87%) 627,716 (67.13%)

2004

[edit]
Ballot Measures from 2004
Measure name Description[106] Status[105] Yes votes No votes
Amendment 34 A constitutional amendment prohibiting laws which would limit property owner's ability to recover damages from construction projects Failed 469,566 (23.45%) 1,533,002 (76.55%)
Amendment 35 A constitutional amendment raising the tobacco tax for the purpose of funding educational and preventive health programs Passed 1,258,086 (61.38%) 791,627 (38.62%)
Amendment 36 A constitutional amendment allowing Colorado's electoral votes to be distributed proportionally Failed 696,770 (34.78%) 1,306,834 (65.22%)
Amendment 37 An initiative requiring that a certain percentage of electricity be generated from renewable sources Passed 1,066,023 (53.61%) 922,577 (46.39%)
Referendum A A constitutional amendment substantially modifying the state civil service system Failed 696,007 (39.19%) 1,080,136 (60.81%)
Referendum B A constitutional amendment removing some obsolete provisions relating to education Passed 1,247,998 (69.00%) 560,811 (31.00%)

2005

[edit]
Ballot Measures from 2005
Measure name Description[107] Status[108] Yes votes No votes
Referendum C An initiative allowing the state to spend money collected over the TABOR limit on health care, public education, transportation, and fire and police projects Passed 600,222 (52.06%) 552,662 (47.94%)
Referendum D An initiative allowing the state to borrow up to $2,000,720,000 (equivalent to $3,121,245,923 in 2023) Failed 567,540 (49.38%) 581,751 (50.62%)

2006

[edit]
Ballot Measures from 2006
Measure name Description[109] Status[108] Yes votes No votes
Amendment 38 A constitutional amendment expanding the ability for citizens to place measures on the ballot Failed 456,468 (30.67%) 1,027,550 (69.24%)
Amendment 39 A constitutional amendment requiring that 65% of school district budgets be allocated towards classroom instruction Failed 569,483 (37.61%) 944,735 (62.39%)
Amendment 40 A constitutional amendment introducing term limits for judges in the Colorado Supreme Court and Colorado Court of Appeals Failed 648,199 (42.91%) 862,349 (57.09%)
Amendment 41 A constitutional amendment prohibiting elected officials and their family members from accepting gifts and restricting former elected official's abilities to become lobbyists Passed 938,888 (62.57%) 561,646 (37.43%)
Amendment 42 A constitutional amendment increasing the minimum wage and tying it to inflation Passed 823,526 (53.30%) 721,530 (46.70%)
Amendment 43 A constitutional amendment prohibiting same-sex marriages Passed 855,126 (55.02%) 699,030 (44.98%)
Amendment 44 An initiative legalizing the possession of marijuana in small amounts Failed 636,938 (41.08%) 913,411 (58.92%)
Referendum E A constitutional amendment providing a property tax exemption to some disabled veterans Passed 1,195,907 (79.24%) 313,292 (20.76%)
Referendum F A constitutional amendment removing some deadlines relating to recall elections Failed 626,015 (44.68%) 775,207 (55.32%)
Referendum G A constitutional amendment eliminating some obsolete provisions Passed 1,092,293 (76.08%) 343,495 (23.92%)
Referendum H An initiative relating to the income tax deduction limit Passed 744,475 (50.74%) 722,651 (49.26%)
Referendum I An initiative granting same-sex couples the same rights as other domestic partnerships Failed 734,385 (47.65%) 806,717 (52.35%)
Referendum J An initiative requiring that school districts spend at least 65% of their budget on student achievement-related services Failed 620,790 (41.53%) 874,151 (58.47%)
Referendum K An initiative requiring the Attorney General of Colorado to engage in a lawsuit against the United States to force the enforcement of existing immigration laws Passed 830,628 (55.72%) 660,012 (44.28%)

2008

[edit]
Ballot Measures from 2008
Measure name Description[110] Status[111] Yes votes No votes
Amendment 46 A constitutional amendment prohibiting discrimination and preferential treatment in public employment, education, and contracting Failed 1,102,046 (49.19%) 1,138,134 (50.81%)
Amendment 47 A constitutional amendment prohibition union contracts which require employees to pay fees to stay employed Failed 1,003,056 (43.89%) 1,282,501 (56.11%)
Amendment 48 A constitutional amendment defining personhood as beginning at conception Failed 618,779 (26.79%) 1,691,237 (73.21%)
Amendment 49 A constitutional amendment prohibiting public employers from using payroll deductions to benefit private organizations Failed 882,428 (39.24%) 1,366,620 (60.76%)
Amendment 50 A constitutional amendment allowing some forms of gambling in Central, Black Hawk, and Cripple Creek cities Passed 1,330,566 (58.70%) 936,254 (41.30%)
Amendment 51 A constitutional amendment increasing the sales tax for the purpose of funding services for the developmentally disabled Failed 853,211 (37.63%) 1,414,065 (62.37%)
Amendment 52 A constitutional amendment creating a trust fund for highway development Failed 790,124 (35.78%) 1,418,009 (64.22%)
Amendment 54 A constitutional amendment limiting campaign contributions from government contract holders Passed 1,130,098 (51.21%) 1,076,694 (48.79%)
Amendment 58 An initiative modifying the severance tax Failed 944,191 (41.95%) 1,306,782 (58.05%)
Amendment 59 A constitutional amendment relating to education funding and rebates Failed 1,010,409 (45.69%) 1,201,220 (54.31%)
Referendum L A constitutional amendment lowering the age requirement to serve as a General Assembly member to 21 Failed 1,010,896 (46.50%) 1,162,296 (53.50%)
Referendum M A constitutional amendment eliminating some obsolete provisions relating to land value increases Passed 1,307,770 (62.26%) 792,678 (37.74%)
Referendum N A constitutional amendment eliminating some obsolete provisions relating to alcohol Passed 1,449,383 (68.75%) 658,684 (31.25%)
Referendum O A constitutional amendment modifying the requirements to place ballot measures on the ballot Failed 1,004,925 (47.50%) 1,110,877 (52.50%)

2010

[edit]
Ballot Measures from 2010
Measure name Description[112] Status[113] Yes votes No votes
Amendment P A constitutional amendment transferring regulatory power over gambling from the Department of State to the Department of Revenue Failed 611,664 (37.67%) 1,012,193 (62.33%)
Amendment Q A constitutional amendment establishing some government continuity procedures Passed 944,446 (57.52%) 697,373 (42.48%)
Amendment R A constitutional amendment eliminating property taxes for some owners Failed 616,516 (38.34%) 991,347 (61.66%)
Amendment 60 A constitutional amendment limiting property tax increases Failed 427,912 (24.50%) 1,318,507 (75.50%)
Amendment 61 A constitutional amendment prohibiting state and local governments from borrowing money without voter approval Failed 474,772 (26.99%) 1,284,307 (73.01%)
Amendment 62 A constitutional amendment defining personhood as beginning at conception Failed 509,062 (29.47%) 1,218,490 (70.53%)
Amendment 63 A constitutional amendment preventing the establishment of a universal healthcare system Failed 800,155 (46.90%) 905,944 (53.10%)
Proposition 101 An initiative substantially reforming the motor vehicle, income, and telecom taxes Failed 564,588 (32.31%) 1,183,000 (67.69%)
Proposition 102 An initiative allowing first-time offenders of nonviolent misdemeanors to be released pretrial without bail Failed 636,444 (38.03%) 1,037,103 (61.97%)

2011

[edit]
Ballot Measures from 2011
Measure name Description[114] Status[115] Yes votes No votes
Proposition 103 An initiative increasing the state income and sales tax Failed 349,746 (36.30%) 611,907 (63.60%)

2012

[edit]
Ballot Measures from 2012
Measure name Description[116] Status[115] Yes votes No votes
Amendment 64 A constitutional amendment legalizing marijuana Passed 1,383,139 (55.32%) 1,116,894 (44.68%)
Amendment 65 A constitutional amendment relating to corporate contributions to political campaigns Passed 1,762,515 (74.01%) 619,073 (25.99%)
Amendment S A constitutional amendment modifying the state personnel system Passed 1,276,405 (56.35%) 988,541 (43.65%)

2013

[edit]
Ballot Measures from 2013
Measure name Description[117] Status[118] Yes votes No votes
Proposition AA An initiative imposing several new taxes on marijuana sales for the purpose of funding school construction and marijuana regulation Passed 902,181 (65.27%) 479,992 (34.73%)
Amendment 66 A constitutional amendment raising some state taxes for the purpose of funding education Failed 496,151 (35.54%) 899,927 (64.46%)

2014

[edit]
Ballot Measures from 2014
Measure name Description[119] Status[118] Yes votes No votes
Amendment 67 A constitutional amendment redefining the terms "person" and "child" to include human fetuses Failed 702,544 (35.13%) 1,297,299 (64.87%)
Amendment 68 A constitutional amendment allowing limited gambling at some horse racetracks for the purpose of funding a kindergarten fund Failed 597,239 (29.62%) 1,419,095 (70.38%)
Proposition 104 An initiative requiring collective bargaining negotiations for school employees to be open to the public Passed 1,364,747 (70.09%) 582,473 (29.91%)
Proposition 105 An initiative requiring that food containing GMOs carry a label clearly identifying them as such Failed 694,738 (34.53%) 1,317,288 (65.47%)

2015

[edit]
Ballot Measures from 2015
Measure name Description[120] Status[121] Yes votes No votes
Proposition BB An initiative allowing the state to retain $66,000,000 in marijuana tax revenues for the purpose of funding school construction projects Passed 847,380 (69.39%) 373,734 (30.61%)

2016

[edit]
Ballot Measures from 2016
Measure name Description[122] Status[121] Yes votes No votes
Amendment T A constitutional amendment prohibiting slavery as a punishment for a crime Failed 1,280,037 (49.68%) 1,296,722 (50.32%)
Amendment U A constitutional amendment exempting some assets from taxation Failed 1,103,593 (43.85%) 1,412,923 (56.15%)
Amendment 69 A constitutional amendment creating a universal healthcare system for Colorado residents Failed 568,683 (21.23%) 2,109,868 (78.77%)
Amendment 70 A constitutional amendment raising the minimum wage to $12.00 an hour Passed 1,517,903 (55.36%) 1,224,189 (44.64%)
Amendment 71 A constitutional amendment requiring initiative petitioners to gather signatures in all 35 state senate districts and imposing a 55% vote threshold for future constitutional amendments Passed 1,476,948 (55.69%) 1,175,324 (44.31%)
Amendment 72 An initiative raising taxes on cigarettes by $1.75 Failed 1,286,851 (46.94%) 1,454,342 (53.06%)
Proposition 106 An initiative legalizing assisted death Passed 1,765,786 (64.87%) 956,263 (35.13%)
Proposition 107 An initiative creating an open primary system for presidential elections Passed 1,701,599 (64.09%) 953,246 (35.91%)
Proposition 108 An initiative allowing unaffiliated electors to vote in primary elections Passed 1,398,577 (53.27%) 1,227,117 (46.73%)

2018

[edit]
Ballot Measures from 2018
Measure name Description[123] Status[124] Yes votes No votes
Amendment A A constitutional amendment prohibiting slavery as a punishment for a crime Passed 1,599,790 (66.21%) 816,342 (33.79%)
Amendment V A constitutional amendment lowering the minimum age for state legislators from 25 to 21 Failed 889,179 (36.19%) 1,567,560 (63.81%)
Amendment W A constitutional amendment allowing county clerks to consolidate judge retention questions on election ballots Failed[d] 1,262,713 (53.81%) 1,083,712 (46.19%)
Amendment X A constitutional amendment redefining "industrial hemp" Passed 1,421,630 (60.64%) 922,597 (39.36%)
Amendment Y A constitutional amendment creating a 12-member redistricting committee for congressional districts Passed 1,711,008 (71.37%) 686,260 (28.63%)
Amendment Z A constitutional amendment creating a 12-member redistricting committee for General Assembly districts Passed 1,687,583 (71.07%) 687,113 (28.93%)
Amendment 73 A constitutional amendment establishing a graduated income tax Failed 1,137,527 (46.43%) 1,312,331 (53.57%)
Amendment 74 A constitutional amendment requiring property owners be compensated if their property value decreased due to changes in state law Failed 1,139,205 (46.42%) 1,315,182 (53.58%)
Amendment 75 A constitutional amendment allowing candidates in races where a self-funded candidate gives their campaign at least $1,000,000 to accept more than the standard campaign contribution limit Failed 813,861 (34.04%) 1,576,835 (65.96%)
Proposition 109 An initiative allowing the state to issue $3,500,000,000 in bonds for the purpose of funding statewide transportation projects Failed 952,814 (39.28%) 1,472,933 (60.72%)
Proposition 110 An initiative authorizing the state to issue $6,000,000,000 in bonds for the purpose of funding statewide transportation projects and raising the state sales tax rate Failed 990,287 (40.61%) 1,448,535 (59.39%)
Proposition 111 An initiative capping payday loan interest rates Passed 1,865,200 (77.25%) 549,357 (22.75%)
Proposition 112 An initiative mandating that new fracking projects be at least 2,500 feet from occupied buildings Failed 1,116,738 (44.88%) 1,371,284 (55.12%)

2019

[edit]
Ballot Measures from 2019
Measure name Description[125] Status[126] Yes votes No votes
Proposition CC An initiative allowing the state to retain excess revenue and direct it towards transportation and education programs Failed 724,060 (46.34%) 838,282 (53.66%)
Proposition DD An initiative legalizing sports betting Passed 800,745 (51.41%) 756,712 (48.59%)

2020

[edit]
Ballot Measures from 2020
Measure name Description[127] Status[128] Yes votes No votes
Amendment B A constitutional amendment repealing the Gallagher Amendment Passed 1,740,395 (57.52%) 1,285,136 (42.48%)
Amendment C A constitutional amendment lowering the entry requirements for charitable lotteries Failed[d] 1,586,973 (52.35%) 1,444,553 (47.65%)
Amendment 76 A constitutional amendment restricting voting to United States citizens Passed 1,985,239 (62.90%) 1,171,137 (37.10%)
Amendment 77 A constitutional amendment allowing voters in Central, Black Hawk, and Cripple Creek cities to expand gambling Passed 1,854,153 (60.54%) 1,208,414 (39.46%)
Proposition EE An initiative to tax nicotine products for the purpose of funding health and education programs Passed 2,134,608 (67.56%) 1,025,182 (32.44%)
Proposition 113 A referendum to uphold Colorado's membership in the National Popular Vote Interstate Compact Passed 1,644,716 (52.33%) 1,498,500 (47.67%)
Proposition 114 An initiative requiring the Colorado Parks and Wildlife Commission to create a management plan to reintroduce gray wolves Passed 1,590,299 (50.91%) 1,533,313 (49.09%)
Proposition 115 An initiative banning abortions after 22 weeks Failed 1,292,787 (41.01%) 1,859,479 (58.99%)
Proposition 116 An initiative decreasing state income tax rates from 4.63% to 4.55% Passed 1,821,702 (57.86%) 1,327,025 (42.14%)
Proposition 117 An initiative requiring statewide voter approval for some new state enterprises Passed 1,573,114 (52.55%) 1,420,445 (47.45%)
Proposition 118 An initiative creating a paid family and medical leave program Passed 1,804,546 (57.75%) 1,320,386 (42.25%)

2021

[edit]
Ballot Measures from 2021
Measure name Description[129] Status[130] Yes votes No votes
Amendment 78 A constitutional amendment transferring power over custodial funds from the state treasurer to the General Assembly Failed 646,983 (43.03%) 856,704 (56.97%)
Proposition 119 An initiative raising the marijuana sales tax for the purpose of funding a Learning Enrichment and Academic Progress Program Failed 701,479 (45.75%) 831,670 (54.25%)
Proposition 120 An initiative modifying property tax rates and allowing the state to spend $25,000,000 over the TABOR cap to reimburse localities for lost revenue Failed 652,382 (42.96%) 866,197 (57.04%)

2022

[edit]
Ballot Measures from 2022
Measure name Description[131] Status[132] Yes votes No votes
Amendment D A constitutional amendment directing the Governor to assign judges to Colorado's 23rd judicial district Passed 1,502,866 (67.38%) 727,409 (32.62%)
Amendment E A constitutional amendment extending a property tax exemption to the surviving spouses of deceased military service members Passed 2,109,471 (87.93%) 298,514 (12.07%)
Amendment F A constitutional amendment modifying the rules relating to charitable gaming Failed 930,370 (40.64%) 1,359,027 (59.36%)
Proposition FF An initiative reducing the income tax deduction for some income brackets for the purpose of funding school meals Passed 1,384,852 (56.75%) 1,055,583 (43.25%)
Proposition GG An initiative requiring that ballot measures changing income taxes break down their impact by tax bracket Passed 1,704,757 (71.92%) 665,476 (28.08%)
Proposition 121 An initiative decreasing the state income tax rate from 4.55% to 4.40% Passed 1,581,163 (65.24%) 842,506 (34.76%)
Proposition 122 An initiative decriminalizing some psychedelic plants and fungi[133] Passed 1,269,992 (53.64%) 1,121,124 (46.36%)
Proposition 123 An initiative creating a state affordable housing fund Passed 1,269,816 (52.61%) 1,143,974 (47.39%)
Proposition 124 An initiative increasing the number of liquor store licenses any single individual can hold Failed 905,565 (37.69%) 1,497,346 (62.31%)
Proposition 125 An initiative allowing stores that are licensed to sell beer for off-site consumption to also sell wine for off-site consumption Passed 1,228,404 (50.58%) 1,200,219 (49.42%)
Proposition 126 An initiative allowing stores that are licensed to sell alcohol for off-site consumption to also offer delivery Failed 1,183,059 (48.86%) 1,238,074 (51.14%)

2023

[edit]
Measure name Description[134] Status[135] Yes votes No votes
Proposition HH A measure modifying the level and distribution of property taxes Failed 682,667 (40.69%) 995,259 (59.31%)
Proposition II A measure requiring the state to spend excess tobacco tax revenues from 2020's Proposition EE on preschool education programs Passed 1,130,047 (67.53%) 543,405 (32.47%)

2024

[edit]
Measure name Description[136] Status Yes votes No votes
Measure #50 A constitutional amendment requiring voter approval for the state government to retain property tax revenue in excess of 4%. Election not yet held
Measure #89 A constitutional amendment codifying a statewide right to abortion, allowing health insurance companies to provide abortion coverage, and allowing public funding for abortion services. Election not yet held
Measure #91 A measure prohibiting the hunting of mountain lions, lynxes, and bobcats. Election not yet held

See also

[edit]

Notes

[edit]
  1. ^ The question on the ballot was multiple-choice with a variety of different options, including Pueblo, Colorado Springs, Cañon City, Salida, Colorado, and a write-in option.
  2. ^ The "no" vote was broken up between Pueblo (6,047), Colorado Springs (4,790), Cañon City (2,788), Salida (695), and write-ins (929).
  3. ^ The General Assembly lists this referendum as having taken place in 1892, however, it actually took place in November 1893.[7]: 148 
  4. ^ a b Since 2016, with the passage of Amendment 71, constitutional amendments need 55% of the vote to pass.

References

[edit]
  1. ^ a b "Colorado". Initiative & Referendum Institute. Archived from the original on November 10, 2022. Retrieved November 10, 2022.
  2. ^ "Medical Aid in Dying Approved". Fort Collins Coloradoan. Fort Collins, Colorado. Associated Press. November 9, 2016. p. A5. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via Newspapers.com.
  3. ^ Ashby, Charles (August 17, 2016). "Constitutional Protection Measure Makes Ballot". Grand Junction Daily Sentinel. Grand Junction, Colorado. p. 2. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via Newspapers.com.
  4. ^ https://ballotpedia.org/Amending_state_constitutions#Colorado
  5. ^ https://www.bellpolicy.org/2024/03/15/colorado-ballot-initiatives-primer-tracker/
  6. ^ Paul, Jesse (July 1, 2020). "Colorado Supreme Court Rejects Governor's Attempt to Allow Signature Gathering for Ballot Initiatives by Email, Mail". The Colorado Sun. Archived from the original on November 13, 2022. Retrieved November 13, 2022.
  7. ^ a b c d Marilley, Suzanne (1996). Woman Suffrage and the Origins of Liberal Feminism in the United States, 1820-1920. Cambridge: Harvard University Press. ISBN 9780674954656. Archived from the original on August 16, 2023. Retrieved March 19, 2023.
  8. ^ a b c "The Suffrage Vote in Colorado". Woman's Journal. 8: 380. December 1, 1877. Archived from the original on November 10, 2022. Retrieved November 10, 2022 – via Alexander Street.
  9. ^ Blackwell, Henry Browne (October 20, 1877). "The Lesson of Colorado". Woman's Journal. 8: 332. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via Alexander Street.
  10. ^ McCammon, Holly J.; Campbell, Karen (2001). "Winning the Vote in the West: The Political Successes of the Women's Suffrage Movements, 1866-1919". Gender and Society. 15 (1): 78. doi:10.1177/089124301015001004. JSTOR 3081830. S2CID 145444696. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via JSTOR.
  11. ^ Moore, Jack (April 7, 2015). "When Denver Rejected the Olympics in Favour of the Environment and Economics". The Guardian. Archived from the original on December 31, 2015. Retrieved November 10, 2022.
  12. ^ Fuchs, Jeremy (February 6, 2018). "'Colorado Would Be Laughing Stock of the World': Remembering Denver's Disastrous 1976 Olympic Bid". Sports Illustrated. Archived from the original on November 9, 2022. Retrieved November 10, 2022.
  13. ^ Carpenter, Les (January 23, 2022). "The Story Behind the 1976 Denver Olympics That Never Happened". The Washington Post. Archived from the original on December 22, 2022. Retrieved November 10, 2022.
  14. ^ "Dick Lamm, Who Served Three Terms As Governor In Colorado, Dies At Age 85". CBS. July 30, 2021. Archived from the original on November 11, 2022. Retrieved November 10, 2022.
  15. ^ "'First Step'". Grand Junction Daily Sentinel. Grand Junction, Colorado. Associated Press. November 26, 1984. p. 3. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via Newspapers.com.
  16. ^ Silbernagel, Bob (May 23, 1995). "Colorado Supporters Vow Not to Let Ruling Stop Term-Limit Effort". Grand Junction Daily Sentinel. Grand Junction, Colorado. p. 1. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via Newspapers.com.
  17. ^ Will, George (May 24, 1995). "Court Rejects Term Limits". Grand Junction Daily Sentinel. Grand Junction, Colorado. p. 4. Archived from the original on November 11, 2022. Retrieved November 11, 2022 – via Newspapers.com.
  18. ^ "Medical Marijuana Initiatives Pass In Colorado and Nevada; Californians Pass Initiative To Keep Non-Violent Drug Offenders Out Of Jail". NORML. December 9, 2000. Archived from the original on November 11, 2022. Retrieved November 10, 2022.
  19. ^ Smith, Aaron (November 8, 2012). "Marijuana Legalization Passes in Colorado, Washington". CNN Business. Archived from the original on November 11, 2022. Retrieved November 10, 2022.
  20. ^ "A Liberal Drift". The Economist. November 10, 2012. Archived from the original on November 11, 2022. Retrieved November 10, 2022.
  21. ^ Brown, Jennifer (November 9, 2022). "Colorado Becomes Second State to Legalize 'Magic Mushrooms'". The Colorado Sun. Archived from the original on November 12, 2022. Retrieved November 10, 2022.
  22. ^ a b Griswold, Jena (September 21, 2021). "Initiative Procedures & Guidelines: A Citizen's Guide to Placing an Initiative on the Ballot" (PDF). Colorado Department of State. Archived from the original (PDF) on November 10, 2022. Retrieved November 10, 2022.
  23. ^ "History of Election Results for Ballot Issues". Colorado General Assembly. Archived from the original on November 10, 2022. Retrieved November 10, 2022.
  24. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as at au av aw ax ay az ba bb "Ballot History by Year". Colorado General Assembly. Archived from the original on November 9, 2022. Retrieved November 9, 2022.
  25. ^ a b Smiley, Jerome C., ed. (1901). History of Denver With Outlines of the Earlier History of the Rocky Mountain Country. Denver: The Denver Times. p. 508. Archived from the original on August 16, 2023. Retrieved March 19, 2023.
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