The following is a list of statewide initiatives and referendums modifying state law and proposing state constitutional amendments in Missouri, sorted by election.
20th century
21st century
2000 +November 2000 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 1A constitutional amendment creating a reserve fund for use by the governor in budget emergencies with legislative approval. 1,223,284 (59.16%) 844,303 (40.84%)Amendment 2A constitutional amendment reducing the amount of time individuals are required to be members of a licensed organization to participate in the operation of a bingo game.672,370 (32.51%)1,395,873 (67.49%)Amendment 3A constitutional amendment requiring salaries for statewide elected officials to be appropriated by the state legislature.780,192 (40.90%)1,127,189 (59.10%)Proposition AAn initiative prohibiting construction of most new outdoor advertising and restricting existing advertising along highways.1,075,333 (48.94%)1,122,119 (51.06%)Proposition BAn initiative establishing a public campaign finance system funded by an increased corporate tax.748,949 (35.40%)1,366,559 (64.60%)
2002 +August 2002 primary electionMeasure nameDescriptionResultYes votesNo votes Proposition AA measure allowing the Missouri Office of Administration to charge a fee of up to $0.50 per month for every wireless telephone number to fund wireless enhanced 911 service.318,875 (34.69%)600,274 (65.31%)Proposition BA measure increasing sales and use taxes by 0.5 cents and increasing the gas tax by 4 cents per gallon to fund highways and transportation until July 2013.255,575 (27.47%)674,779 (72.53%) +November 2002 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 1A constitutional amendment allowing the city of St. Louis to amend their charter to reorganize their county functions and offices.1,173,822 (69.44%)516,584 (30.56%)Amendment 2An initiated constitutional amendment allowing firefighters, ambulance personnel, and emergency dispatchers to collectively bargain.840,493 (48.81%)881,395 (51.19%)Amendment 3A constitutional amendment excluding service of less than half of a legislative term from term limit calculations.879,162 (54.27%)740,941 (45.73%)Amendment 4A constitutional amendment allowing joint boards or commissions established by political subdivisions to own joint projects and issue bonds without regulation by the Public Service Commission.927,715 (57.77%)678,137 (42.23%)Proposition AAn initiative increasing the cigarette tax by 2.75 cents per cigarette ($0.55 per pack) and 20% on other tobacco products to fund healthcare, medical research, smoking prevention, and early childhood education.881,701 (49.15%)912,210 (50.85%)Constitutional Convention QuestionA measure calling for a constitutional convention.569,598 (34.55%)1,079,085 (65.45%) 2004 + August 2004 primary electionMeasure nameDescriptionResultYes votesNo votesAmendment 1An initiated constitutional amendment authorizing floating gambling facilities on the White River in Rockaway Beach, with the revenue being evenly split between teacher salary supplements and capital improvements to schools.659,433 (44.13%)834,943 (55.87%) Amendment 2 A constitutional amendment prohibiting same-sex marriages from being recognized in Missouri. 1,055,771 (70.61%) 439,529 (29.39%) +November 2004 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 3 An initiated constitutional amendment allocating all gas tax revenue to highways, roads, and bridges. 1,966,617 (78.87%) 526,872 (21.13%)
2006 +August 2006 primary electionMeasure nameDescriptionResultYes votesNo votes Amendment 1 A constitutional amendment reauthorizing a 0.1% sales and use tax for 10 years to fund state parks and conservation projects. 485,103 (70.79%) 200,179 (29.21%) + November 2006 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 2 An initiated constitutional amendment allowing any stem cell research permitted under federal law and prohibiting human cloning. 1,085,396 (51.20%) 1,034,596 (48.80%)Amendment 3An initiated constitutional amendment increasing tobacco taxes to fund tobacco prevention programs and provide healthcare for low income Medicaid recipients.1,029,027 (48.57%)1,089,701 (51.43%)Amendment 6A constitutional amendment creating a tax exemption for property that is used for nonprofit purposes or activities of veterans' organizations.1,237,719 (61.28%)782,138 (38.72%)Amendment 7A constitutional amendment preventing elected officials and judges from receiving a state pension if they are convicted of a felony while in office, removed from office for misconduct, or impeached.1,720,007 (84.12%)324,637 (15.88%)Proposition BAn initiative increasing the minimum wage to $6.50 per hour and adjusting annually based on the Consumer Price Index.1,594,632 (75.97%)504,294 (24.03%)
2008 +November 2008 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 1A constitutional amendment establishing English as the official language for all governmental meetings. 2,407,536 (86.31%) 381,874 (13.69%)Amendment 4A constitutional amendment limiting grants and loans for stormwater control projects to public water and sewer districts.1,494,107 (57.85%)1,088,728 (42.15%)Proposition AAn initiative eliminating gambling loss limits, restricting the number of casinos that can be built in the state, and increasing the gambling tax by 1% to provide for public school education.1,578,674 (56.17%)1,231,892 (43.83%)Proposition BAn initiative creating the Missouri Quality Homecare Council, which would ensure the availability of quality home care services for the elderly and disabled.2,077,831 (75.26%)683,137 (24.74%)Proposition CAn initiative requiring electric utility companies to generate or purchase at least 15% of their electricity from renewable sources by 2021. 1,777,500 (66.03%)914,332 (33.97%)
2010s
2010 +August 2010 primary electionMeasure nameDescriptionResultYes votesNo votes Proposition CA constitutional amendment prohibiting the government from imposing penalties on people who do not purchase health insurance. 669,847 (71.07%) 272,723 (28.93%) +November 2010 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 1A constitutional amendment requiring the office of county assessor to be an elected position in all charter counties except Jackson County. 1,360,556 (74.12%) 475,000 (25.88%)Amendment 2A constitutional amendment exempting all real property used as a homestead by former prisoners of war from property taxes.1,227,297 (65.76%)639,065 (34.24%)Amendment 3An initiated constitutional amendment prohibiting any new tax on the sale or transfer of real estate.1,592,177 (83.73%)309,398 (16.27%)Proposition AAn initiative requiring cities to hold referendums on earnings taxes levied by the city.1,297,197 (68.39%)599,672 (31.61%)Proposition BAn initiative requiring large-scale dog breeding operations to provide humane treatment and veterinary care and limiting the number of dogs breeders can own.997,870 (51.59%)936,190 (48.41%)
2012 +August 2012 primary electionMeasure nameDescriptionResultYes votesNo votes Amendment 2A constitutional amendment protecting the right to express religious beliefs, allowing children the right to pray in schools, and requiring all public schools to display the Bill of Rights. 780,567 (82.76%) 162,631 (17.24%) +November 2012 general electionMeasure nameDescriptionResultYes votesNo votesAmendment 3A constitutional amendment changing the selection of supreme court judges from a nonpartisan process to one that would give the governor more discretion and control over a selecting commission.608,458 (23.97%)1,929,470 (76.03%)Proposition AAn initiative allowing the city of St. Louis to establish a municipal police force by transferring control of the city's police force from a governor-appointed board of police commissioners to the city.1,617,443 (63.89%)914,143 (36.11%)Proposition BAn initiative implementing a tax on tobacco products to fund tobacco prevention services in education institutions.1,321,586 (49.25%)1,362,005 (50.75%)Proposition EA measure prohibiting the governor from establishing any state-operated health insurance exchange without approval from the legislature or voters.1,573,292 (61.71%)976,250 (38.29%)
2014 + August 2014 primary electionMeasure nameDescriptionResultYes votesNo votes Amendment 1A constitutional amendment establishing a right to farm and ranch. 499,963 (50.12%) 497,588 (49.88%)Amendment 5A constitutional amendment establishing a right to keep and bear arms.602,863 (60.95%)386,308 (39.05%)Amendment 7A constitutional amendment increasing the sales tax by 0.75% for ten years to fund transportation projects.408,288 (40.82%)591,932 (59.18%)Amendment 8A constitutional amendment allowing the creation of a Veterans Lottery Ticket to fund veterans' services.441,520 (45.01%)539,519 (54.99%)Amendment 9A constitutional amendment protecting personal electronic communication and data from unreasonable searches and seizures.729,752 (74.75%)246,515 (25.25%) + November 2014 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 2A constitutional amendment allowing evidence of prior criminal acts to be admissible in prosecutions for sexual crimes involving a victim under the age of eighteen. 1,018,773 (71.98%) 396,519 (28.02%)Amendment 3An initiated constitutional amendment implementing teacher performance evaluations to determine their employment status and prohibiting teachers from collectively bargaining regarding the implementation of this evaluation system.339,422 (23.57%)1,100,628 (76.43%)Amendment 6A constitutional amendment establishing a six day long early voting period.416,447 (29.70%)985,966 (70.30%)Amendment 10A constitutional amendment restricting the governor's power to use public funds in the budget without legislative approval. 791,099 (56.80%)601,699 (42.20%)
2016 + November 2016 general electionMeasure nameDescriptionResultYes votesNo votes Amendment 1A constitutional amendment reauthorizing a 0.1% sales and use tax for 10 years to fund state parks and conservation projects. 2,187,773 (79.88%) 551,117 (20.12%)Amendment 2An initiated constitutional amendment establishing limits on political campaign contributions.1,894,870 (69.95%)814,016 (30.05%)Amendment 3An initiated constitutional amendment increasing cigarette taxes by 60 cents per pack by 2020.1,120,389 (40.45%)1,649,723 (59.55%)Amendment 4An initiated constitutional amendment prohibiting new sales/use taxes on any service or transaction not subject to a sales/use tax before 2015.1,533,909 (56.98%)1,158,291 (43.02%)Amendment 6A constitutional amendment allowing laws that require the presentation of a voter ID when voting in elections.1,712,274 (63.01%)1,005,234 (36.99%)Proposition AAn initiative increasing cigarette taxes by 23 cents per pack by 2021.1,223,251 (44.81%)1,506,644 (55.19%)
2018 + August 2018 primary electionMeasure nameDescriptionResultYes votesNo votes Proposition AA referendum enacting a right-to-work law, which would prohibit employers from requiring union membership as a condition of employment. 453,283 (32.53%) 939,973 (67.47%)