Ballot measure supermajority requirements ballot measures

Voters have decided on ballot measure supermajority requirements across the U.S. As a state ballot measure topic, this includes measures to increase, decrease, or otherwise change the vote threshold to approve certain ballot measure types. The topic is grouped within the election policy area.

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Upcoming ballot measures

See also: 2026 ballot measures and 2027 ballot measures

The following is a list of state ballot measures related to this topic that are certified or potential for this year and future elections:

2026

1. California Supermajority Requirement for Initiatives Establishing One-Time Revenue Sources Amendment (2026) - Potential
2. California Two-Thirds Vote Requirement for Special Taxes Initiative (2026) - Potential
3. California Vote Requirements for Initiatives Requiring Supermajority Votes Amendment (2026) - On the ballot
4. Hawaii Simple Majority Vote for Constitutional Amendments Measure (2026) - Potential
5. Missouri Amendment 4, Require Congressional District Approval for Initiated Constitutional Amendments, Prohibit Foreign Contributions, and Penalize Petition Fraud Amendment (2026) - On the ballot
6. North Dakota 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
7. South Dakota Constitutional Amendment L, 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
8. Utah 60% Vote Requirement for Ballot Initiatives to Increase or Expand Taxes Amendment (2026) - On the ballot

List of state ballot measures

Click the tabs to view state ballot measures related to this topic, organized by year or state.

Years

States

2026

1. California Supermajority Requirement for Initiatives Establishing One-Time Revenue Sources Amendment (2026) - Potential
2. California Two-Thirds Vote Requirement for Special Taxes Initiative (2026) - Potential
3. California Vote Requirements for Initiatives Requiring Supermajority Votes Amendment (2026) - On the ballot
4. Hawaii Simple Majority Vote for Constitutional Amendments Measure (2026) - Potential
5. Missouri Amendment 4, Require Congressional District Approval for Initiated Constitutional Amendments, Prohibit Foreign Contributions, and Penalize Petition Fraud Amendment (2026) - On the ballot
6. North Dakota 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
7. South Dakota Constitutional Amendment L, 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
8. Utah 60% Vote Requirement for Ballot Initiatives to Increase or Expand Taxes Amendment (2026) - On the ballot

2024

1. California Proposition 5, Lower Supermajority Requirement to 55% for Local Bond Measures to Fund Housing and Public Infrastructure Amendment (2024)

2023

1. Ohio Issue 1, 60% Vote Requirement to Approve Constitutional Amendments Measure (2023)

2022

1. Arizona Proposition 132, 60% Vote Requirement for Ballot Measures to Approve Taxes Amendment (2022)
2. Arkansas Issue 2, 60% Supermajority Vote Requirement for Constitutional Amendments and Ballot Initiatives Measure (2022)
3. South Dakota Constitutional Amendment C, 60% Vote Requirement for Ballot Measures Increasing Taxes or Appropriating $10 Million Measure (June 2022)

2018

1. South Dakota Constitutional Amendment X, 55% Vote Requirement to Approve Constitutional Amendments Measure (2018)

2016

1. California Proposition 50, Legislator Suspension Amendment (June 2016)
2. Colorado Amendment 71, 55% Vote Requirement and Signature Distribution Requirement for Constitutional Amendments Measure (2016)

2012

1. Washington Initiative 1185, Tax Increase Approval Requirement Measure (2012)

2010

1. Alabama Special County Educational Tax Amendment, Amendment 2 (2010)

2008

1. Arizona Proposition 105, Supermajority Requirement for Tax and Spending Initiatives Amendment (2008)
2. Oregon Measure 56, Eliminate Voter Turnout Requirement for Property Tax Elections Amendment (2008)

2007

1. Washington HJR 4204, Simple Majority for Excess School Tax Levies Amendment (2007)

2006

1. Florida Amendment 3, 60% Majority Requirement for Constitutional Amendments Amendment (2006)

2004

1. Maine Question 1, Impose Maximum Limit on Property Taxes and Require Voter Approval to Raise the Limit Initiative (2004)

2000

1. Arizona Proposition 102, Two-Thirds Vote Requirement for Hunting-Related Initiatives Amendment (2000)
2. California Proposition 26, Simple Majority Vote for Local School Bonds and Charter School Facilities Initiative (March 2000)
3. California Proposition 39, Decrease Supermajority from Two-Thirds to 55% for School Bonds Amendment (2000)

1998

1. Missouri Amendment 2, Voter Approval Requirements for School Property Taxes Measure (1998)
2. Oregon Measure 63, Supermajority Vote for Ballot Measures Proposing Supermajority Requirements Initiative (1998)
3. Utah Proposition 5, Two-Thirds Vote Requirement for Hunting-Related Initiatives Amendment (1998)

1996

1. California Proposition 218, Voter Approval Requirement for Local Tax Increases Initiative (1996)
2. Florida Amendment 1, Two-Thirds Vote Requirement for State Taxes or Fees Constitutional Amendment Initiative (1996)
3. Oregon Measure 46, Require Majority of Registered Voters to Approve Tax Increase Ballot Measures Initiative (1996)
4. South Dakota Amendment B, Supermajority Vote Required to Raise Taxes Measure (1996)

1992

1. Missouri Amendment 1, Four-Sevenths Majority for Tax Increases Measure (1992)
2. Missouri Amendment 10, St. Louis Bond Issue Approval Requirement Measure (1992)

1990

1. California Proposition 136, Changes to Vote Requirements for New or Increased Taxes Initiative (1990)
2. Missouri Amendment 3, Four-Sevenths Majority for Tax Increases Measure (August 1990)

1988

1. Missouri Amendment 4, Required Majority Vote for Bond Approval Measure (August 1988)

1986

1. California Proposition 62, Approval of Local Taxes Initiative (1986)

1985

1. Washington HJR 22, Voter Approval of Excess School Tax Levies Amendment (1985)

1984

1. Nevada Question 12, Government Taxes and Fees Initiative (1984)

1982

1. Missouri Amendment 11, Four-Sevenths Vote to Issue Bonds Measure (1982)

1980

1. Idaho SJR 112, Simple Majority Vote for Citizen Initiatives and Allow Initiatives on General Election Ballots Amendment (1980)
2. Michigan Proposal D, Voter Approval Requirement for New or Increased Taxes Initiative (1980)

1978

1. South Dakota Amendment D, Approval for Income Tax Increase Measure (1978)

1974

1. Arizona Proposition 102, Require Minimum 10% Turnout for Bond and Assessment Elections Amendment (1974)
2. Georgia Amendment 7, Revenue Certificate Elections Measure (1974)
3. Missouri Amendment 2, Voter Approval Requirements for Local Government Bonds for Industrial Projects Measure (1974)
4. Oklahoma State Question 495, Simple Majority Vote for Citizen Initiatives Measure (August 1974)
5. Oklahoma State Question 496, Simple Majority Vote for Constitutional Amendments Measure (August 1974)

1972

1. Washington SJR 5, 60% Vote Requirement for Lotteries Amendment (1972)

1968

1. Missouri Amendment 1, Voter Approval of Municipal Bonds Measure (1968)

1966

1. California Proposition 4, Approval Percentage for Bond Issues About Schools and Libraries Amendment (1966)

1960

1. Michigan Proposal 3, Vote Requirement for Constitutional Convention Questions and Delegate Elections Initiative (1960)

1952

1. Missouri Amendment 2, School District Debt Limit Measure (1952)

1934

1. Idaho HJR 7, Simple Majority Vote for Citizen Initiatives Measure (1934)

1933

1. Oregon Measure Nos. 308-309, Two-Thirds Vote for Municipal Bonds Amendment (July 1933)

1920

1. Missouri Amendment 3, Allow Large Cities to Increase Bonded Debt for Public Utility Acquisition Measure (1920)
2. Nebraska Amendment 39, Constitutional Amendment Vote Requirements Amendment (September 1920)

1916

1. Arizona Measure Nos. 100-101, Require Majority of Votes Cast in Election to Approve Ballot Initiatives Amendment (1916)

1915

1. California Proposition 7, Two-Thirds Vote Requirement for Initiated Bond Measures Amendment (October 1915)

1912

1. Ohio Simple Majority Vote for Constitutional Amendments Measure (September 1912)
2. Oregon Measure Nos. 310-311, Require Majority of Votes Cast in Election to Approve Constitutional Amendments Measure (1912)
3. Oregon Measure Nos. 322-323, Require Majority of Votes Cast in Election to Approve Ballot Initiatives Measure (1912)

1908

1. Texas Proposition 2, School District Taxes Amendment (1908)

Alabama

1. Alabama Special County Educational Tax Amendment, Amendment 2 (2010)

Arizona

1. Arizona Measure Nos. 100-101, Require Majority of Votes Cast in Election to Approve Ballot Initiatives Amendment (1916)
2. Arizona Proposition 102, Require Minimum 10% Turnout for Bond and Assessment Elections Amendment (1974)
3. Arizona Proposition 102, Two-Thirds Vote Requirement for Hunting-Related Initiatives Amendment (2000)
4. Arizona Proposition 105, Supermajority Requirement for Tax and Spending Initiatives Amendment (2008)
5. Arizona Proposition 132, 60% Vote Requirement for Ballot Measures to Approve Taxes Amendment (2022)

Arkansas

1. Arkansas Issue 2, 60% Supermajority Vote Requirement for Constitutional Amendments and Ballot Initiatives Measure (2022)

California

1. California Proposition 136, Changes to Vote Requirements for New or Increased Taxes Initiative (1990)
2. California Proposition 218, Voter Approval Requirement for Local Tax Increases Initiative (1996)
3. California Proposition 26, Simple Majority Vote for Local School Bonds and Charter School Facilities Initiative (March 2000)
4. California Proposition 39, Decrease Supermajority from Two-Thirds to 55% for School Bonds Amendment (2000)
5. California Proposition 4, Approval Percentage for Bond Issues About Schools and Libraries Amendment (1966)
6. California Proposition 5, Lower Supermajority Requirement to 55% for Local Bond Measures to Fund Housing and Public Infrastructure Amendment (2024)
7. California Proposition 50, Legislator Suspension Amendment (June 2016)
8. California Proposition 62, Approval of Local Taxes Initiative (1986)
9. California Proposition 7, Two-Thirds Vote Requirement for Initiated Bond Measures Amendment (October 1915)
10. California Supermajority Requirement for Initiatives Establishing One-Time Revenue Sources Amendment (2026) - Potential
11. California Two-Thirds Vote Requirement for Special Taxes Initiative (2026) - Potential
12. California Vote Requirements for Initiatives Requiring Supermajority Votes Amendment (2026) - On the ballot

Colorado

1. Colorado Amendment 71, 55% Vote Requirement and Signature Distribution Requirement for Constitutional Amendments Measure (2016)

Florida

1. Florida Amendment 1, Two-Thirds Vote Requirement for State Taxes or Fees Constitutional Amendment Initiative (1996)
2. Florida Amendment 3, 60% Majority Requirement for Constitutional Amendments Amendment (2006)

Georgia

1. Georgia Amendment 7, Revenue Certificate Elections Measure (1974)

Hawaii

1. Hawaii Simple Majority Vote for Constitutional Amendments Measure (2026) - Potential

Idaho

1. Idaho HJR 7, Simple Majority Vote for Citizen Initiatives Measure (1934)
2. Idaho SJR 112, Simple Majority Vote for Citizen Initiatives and Allow Initiatives on General Election Ballots Amendment (1980)

Maine

1. Maine Question 1, Impose Maximum Limit on Property Taxes and Require Voter Approval to Raise the Limit Initiative (2004)

Michigan

1. Michigan Proposal 3, Vote Requirement for Constitutional Convention Questions and Delegate Elections Initiative (1960)
2. Michigan Proposal D, Voter Approval Requirement for New or Increased Taxes Initiative (1980)

Missouri

1. Missouri Amendment 1, Four-Sevenths Majority for Tax Increases Measure (1992)
2. Missouri Amendment 1, Voter Approval of Municipal Bonds Measure (1968)
3. Missouri Amendment 10, St. Louis Bond Issue Approval Requirement Measure (1992)
4. Missouri Amendment 11, Four-Sevenths Vote to Issue Bonds Measure (1982)
5. Missouri Amendment 2, School District Debt Limit Measure (1952)
6. Missouri Amendment 2, Voter Approval Requirements for Local Government Bonds for Industrial Projects Measure (1974)
7. Missouri Amendment 2, Voter Approval Requirements for School Property Taxes Measure (1998)
8. Missouri Amendment 3, Allow Large Cities to Increase Bonded Debt for Public Utility Acquisition Measure (1920)
9. Missouri Amendment 3, Four-Sevenths Majority for Tax Increases Measure (August 1990)
10. Missouri Amendment 4, Require Congressional District Approval for Initiated Constitutional Amendments, Prohibit Foreign Contributions, and Penalize Petition Fraud Amendment (2026) - On the ballot
11. Missouri Amendment 4, Required Majority Vote for Bond Approval Measure (August 1988)

Nebraska

1. Nebraska Amendment 39, Constitutional Amendment Vote Requirements Amendment (September 1920)

Nevada

1. Nevada Question 12, Government Taxes and Fees Initiative (1984)

North Dakota

1. North Dakota 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot

Ohio

1. Ohio Issue 1, 60% Vote Requirement to Approve Constitutional Amendments Measure (2023)
2. Ohio Simple Majority Vote for Constitutional Amendments Measure (September 1912)

Oklahoma

1. Oklahoma State Question 495, Simple Majority Vote for Citizen Initiatives Measure (August 1974)
2. Oklahoma State Question 496, Simple Majority Vote for Constitutional Amendments Measure (August 1974)

Oregon

1. Oregon Measure 46, Require Majority of Registered Voters to Approve Tax Increase Ballot Measures Initiative (1996)
2. Oregon Measure 56, Eliminate Voter Turnout Requirement for Property Tax Elections Amendment (2008)
3. Oregon Measure 63, Supermajority Vote for Ballot Measures Proposing Supermajority Requirements Initiative (1998)
4. Oregon Measure Nos. 308-309, Two-Thirds Vote for Municipal Bonds Amendment (July 1933)
5. Oregon Measure Nos. 310-311, Require Majority of Votes Cast in Election to Approve Constitutional Amendments Measure (1912)
6. Oregon Measure Nos. 322-323, Require Majority of Votes Cast in Election to Approve Ballot Initiatives Measure (1912)

South Dakota

1. South Dakota Amendment B, Supermajority Vote Required to Raise Taxes Measure (1996)
2. South Dakota Amendment D, Approval for Income Tax Increase Measure (1978)
3. South Dakota Constitutional Amendment C, 60% Vote Requirement for Ballot Measures Increasing Taxes or Appropriating $10 Million Measure (June 2022)
4. South Dakota Constitutional Amendment L, 60% Vote Requirement for Constitutional Amendments Measure (2026) - On the ballot
5. South Dakota Constitutional Amendment X, 55% Vote Requirement to Approve Constitutional Amendments Measure (2018)

Texas

1. Texas Proposition 2, School District Taxes Amendment (1908)

Utah

1. Utah 60% Vote Requirement for Ballot Initiatives to Increase or Expand Taxes Amendment (2026) - On the ballot
2. Utah Proposition 5, Two-Thirds Vote Requirement for Hunting-Related Initiatives Amendment (1998)

Washington

1. Washington HJR 22, Voter Approval of Excess School Tax Levies Amendment (1985)
2. Washington HJR 4204, Simple Majority for Excess School Tax Levies Amendment (2007)
3. Washington Initiative 1185, Tax Increase Approval Requirement Measure (2012)
4. Washington SJR 5, 60% Vote Requirement for Lotteries Amendment (1972)

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