Missouri Amendment 4 (2026): What Voters Need to Know
Protecting Missouri Voters
In 2026, Missouri voters will decide on Amendment 4, a statewide ballot measure that would change how initiative petitions are approved and how ballot measures are presented to voters.
Amendment 4 will appear on the ballot in the following form:
Shall the Missouri Constitution be amended to:
- – Modify current requirements that a statewide majority of voters may approve initiative petitions to amend the constitution
- – Require a majority of voters in each congressional district to approve initiative petitions to amend the constitution
- – Make available to each voter the full text of initiative petitions with their ballot
When will Amendment 4 be on the Ballot in Missouri?
Amendment 4 will appear on the ballot in 2026. The Governor has the option to move ballot measures from the General election in November to the Primary election in August.
What does Amendment 4 do?
Amendment 4 makes Missouri’s initiative petition process more transparent and reflective of the will of voters across the state.
Missouri’s constitution allows citizens to place initiatives on the ballot, but that power only works if the process is transparent, fair, and trusted by voters across the state.
Ballot initiatives rely on large-scale signature collection efforts carried out by petition circulators and professional firms.
Amendment 4 adds clearer rules and transparency for voters to address misleading ballot summaries and the influence of big money donors in initiative campaigns. It ensures that amendments to our state constitution have broad statewide support.
At its core, Amendment 4 aims to ensure that changes to Missouri’s constitution reflect broad, informed support from Missourians, rather than special interests or radical activists.
Transparency

Some voters have expressed frustration with learning the full impact of ballot measures only after they are passed.
- – The Protect MO Voters Amendment requires the entire ballot measure to be provided to each voter, not just the summary.
- – In 2020, Missouri voters were forced to repeal redistricting provisions hidden within the Clean Missouri Amendment.
- – In 2026, Missouri voters will vote to restore health and safety protections to abortion facilities whose repeal was hidden in the text of the 2024 abortion amendment.
Frequently Asked Questions About Amendment 4
What is Missouri Amendment 4 (2026)?
Amendment 4 is a proposed change to the Missouri Constitution that would modify the citizen initiative process.
Why was Missouri Amendment 4 proposed?
Amendment 4 was proposed to address concerns about how ballot measures are presented to voters, how initiative petitions are approved, and whether constitutional changes reflect broad statewide support.
How does Missouri Amendment 4 protect Missouri voters?
Missouri Amendment 4 protects voters by increasing transparency in the petition process and ensuring statewide support for constitutional changes.
Does Missouri Amendment 4 affect voting rights?
No. Amendment 4 does not change who can vote, how voting works, or how elections are conducted. It applies to the initiative petition process, not individual voting rights.