State legislative structure ballot measures

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Measures by state

As a state ballot measure topic, state legislative structure refers to measures regarding the structure of state legislatures, including the number of legislators and unicameral versus bicameral structures. The topic is grouped within the governance policy area.

This page provides information on:

• upcoming ballot measures and
• a comprehensive list of ballot measures by year and state.

Upcoming ballot measures

See also: 2025 ballot measures and 2026 ballot measures

The following is a list of state ballot measures related to state legislative structure certified for this year and future elections:

There are no ballot measures related to this topic that have qualified for the ballot.

List of ballot measures

Click the tabs to view state ballot measures related to state legislative structure, organized by year or state.

Year

State

2022

1. American Samoa, Amendment 4, House of Representatives Size Measure (2022)
2. American Samoa, Amendment 6, Swains Island Voting Delegate Measure (2022)
3. American Samoa, Amendment 7, Senate Size Measure (2022)

2020

1. Idaho Constitutional Amendment HJR4, Require 35 Legislative Districts Amendment (2020)

2012

1. Oregon Measure 78, Government Branches Amendment (2012)

2010

1. Alaska Ballot Measure 1, Increase Size of State Legislature Amendment (2010)

2004

1. Nebraska Amendment 2, Change Presiding Officer of Legislature Measure (2004)

1998

1. Georgia Amendment 5, Commission on Compensation of Public Officials Amendment (1998)
2. Nebraska Amendment 6, Change Presiding Officer of Legislature Measure (May 1998)
3. Nevada Question 8, Senate President Amendment (1998)

1986

1. Idaho Limit Size of Legislature, HJR 4 (1986)

1980

1. Alaska Ballot Proposition 3, Authorization of Special Legislative Committees Amendment (1980)
2. Illinois Reduce Size of House of Representatives and Eliminate Cumulative Voting Initiative (1980)

1976

1. Alaska Ballot Proposition 6, Unicameral Legislature Question (1976)

1974

1. Massachusetts Question 2, Reduce Size of House and Change Redistricting Process Amendment (1974)
2. New Hampshire Increase Size of Senate Amendment (1974)

1972

1. Nebraska Amendment 6, Removal of Obsolete Legislative Language Amendment (May 1972)
2. North Dakota Unicameral or Bicameral Legislature, Alternate Proposition 1 (1972)

1970

1. Nebraska Amendment 13a, Presiding Officer of the Legislature Amendment (1970)

1966

1. Missouri Amendment 3, Representative and Senatorial Districts Measure (January 1966)

1965

1. Missouri Amendment 3, State Legislative Apportionment and Staffing Limits Measure (August 1965)

1964

1. North Carolina Increase Size of Senate and Reduce Size of House Amendment (January 1964)

1962

1. California Proposition 23, Increase Size of Senate and Change Apportionment Rules Initiative (1962)

1953

1. Arizona Proposition 100, Size of State Legislature Amendment (September 1953)

1950

1. Oregon Measure Nos. 314-315, Increase Size of Senate and Require Reapportionment Every 10 Years Initiative (1950)

1944

1. Missouri Amendment 2, Unicameral Legislature Initiative (1944)

1938

1. Oklahoma State Question 243, Legislative Size and Salaries Amendment (1938)

1934

1. Nebraska Amendment 2, Unicameral Legislature Initiative (1934)

1932

1. Arizona Measure Nos. 108-109, Reduce Size of House of Representatives Initiative (1932)

1930

1. Michigan Apportionment of the State Legislature Initiative (1930)

1928

1. Michigan Establishment of Legislative Districts Amendment (1928)

1924

1. Michigan Establishment of Legislative Districts Initiative (1924)

1921

1. New Hampshire Size of Legislature Amendment (1921)

1916

1. Arizona Measure Nos. 112-113, Abolish State Senate and Create Unicameral Legislature Initiative (1916)

1914

1. Minnesota Limit Size of the State Senate, Amendment 7 (1914)
2. Oregon Measure Nos. 350-351, Unicameral Legislature Initiative (1914)

1912

1. Minnesota Limit Size of State Senate, Amendment 6 (1912)
2. Oregon Measure Nos. 362-363, Unicameral Legislature and Proportional Representation Initiative (1912)

1835

1. North Carolina State Constitution Revisions Amendment (1835)

Alaska

1. Alaska Ballot Measure 1, Increase Size of State Legislature Amendment (2010)
2. Alaska Ballot Proposition 3, Authorization of Special Legislative Committees Amendment (1980)
3. Alaska Ballot Proposition 6, Unicameral Legislature Question (1976)

American Samoa

1. American Samoa, Amendment 4, House of Representatives Size Measure (2022)
2. American Samoa, Amendment 6, Swains Island Voting Delegate Measure (2022)
3. American Samoa, Amendment 7, Senate Size Measure (2022)

Arizona

1. Arizona Measure Nos. 108-109, Reduce Size of House of Representatives Initiative (1932)
2. Arizona Measure Nos. 112-113, Abolish State Senate and Create Unicameral Legislature Initiative (1916)
3. Arizona Proposition 100, Size of State Legislature Amendment (September 1953)

California

1. California Proposition 23, Increase Size of Senate and Change Apportionment Rules Initiative (1962)

Georgia

1. Georgia Amendment 5, Commission on Compensation of Public Officials Amendment (1998)

Idaho

1. Idaho Constitutional Amendment HJR4, Require 35 Legislative Districts Amendment (2020)
2. Idaho Limit Size of Legislature, HJR 4 (1986)

Illinois

1. Illinois Reduce Size of House of Representatives and Eliminate Cumulative Voting Initiative (1980)

Massachusetts

1. Massachusetts Question 2, Reduce Size of House and Change Redistricting Process Amendment (1974)

Michigan

1. Michigan Apportionment of the State Legislature Initiative (1930)
2. Michigan Establishment of Legislative Districts Amendment (1928)
3. Michigan Establishment of Legislative Districts Initiative (1924)

Minnesota

1. Minnesota Limit Size of State Senate, Amendment 6 (1912)
2. Minnesota Limit Size of the State Senate, Amendment 7 (1914)

Missouri

1. Missouri Amendment 2, Unicameral Legislature Initiative (1944)
2. Missouri Amendment 3, Representative and Senatorial Districts Measure (January 1966)
3. Missouri Amendment 3, State Legislative Apportionment and Staffing Limits Measure (August 1965)

Nebraska

1. Nebraska Amendment 13a, Presiding Officer of the Legislature Amendment (1970)
2. Nebraska Amendment 2, Change Presiding Officer of Legislature Measure (2004)
3. Nebraska Amendment 2, Unicameral Legislature Initiative (1934)
4. Nebraska Amendment 6, Change Presiding Officer of Legislature Measure (May 1998)
5. Nebraska Amendment 6, Removal of Obsolete Legislative Language Amendment (May 1972)

Nevada

1. Nevada Question 8, Senate President Amendment (1998)

New Hampshire

1. New Hampshire Increase Size of Senate Amendment (1974)
2. New Hampshire Size of Legislature Amendment (1921)

North Carolina

1. North Carolina Increase Size of Senate and Reduce Size of House Amendment (January 1964)
2. North Carolina State Constitution Revisions Amendment (1835)

North Dakota

1. North Dakota Unicameral or Bicameral Legislature, Alternate Proposition 1 (1972)

Oklahoma

1. Oklahoma State Question 243, Legislative Size and Salaries Amendment (1938)

Oregon

1. Oregon Measure 78, Government Branches Amendment (2012)
2. Oregon Measure Nos. 314-315, Increase Size of Senate and Require Reapportionment Every 10 Years Initiative (1950)
3. Oregon Measure Nos. 350-351, Unicameral Legislature Initiative (1914)
4. Oregon Measure Nos. 362-363, Unicameral Legislature and Proportional Representation Initiative (1912)

See also

• List of ballot measures by topic