Missouri is one of 12 states with potential abortion-related ballot measures in 2024, with measures confirmed on the ballot in three other states.


Missouri voters may decide on a citizen-initiated constitutional amendment providing a state constitutional right to abortion in Nov. 2024.

Missourians for Constitutional Freedom is leading the campaign in support of the amendment, which would provide a constitutional right to reproductive freedom. The amendment defines this as “the right to make and carry out decisions about all matters relating to reproductive health care, including but not limited to prenatal care, childbirth, postpartum care, birth control, abortion care, miscarriage care, and respectful birthing conditions.” The amendment would also provide that the state legislature may enact laws that regulate abortion after fetal viability.

The campaign has until May 5, 2024, to submit enough valid signatures to the secretary of state. In Missouri, the number of signatures required to qualify an initiated constitutional amendment for the ballot is equal to 8 percent of the votes cast for governor in the previous gubernatorial election in six of the eight state congressional districts. This means that the smallest possible requirement is 171,592 valid signatures. If enough valid signatures are submitted, the amendment will be placed on the 2024 ballot for Missouri voters to decide.

Another Missouri campaign for an abortion-related constitutional amendment was recently suspended. Jamie Corley withdrew six submitted initiatives that would have made various constitutional changes regarding abortion, including adding rape and incest exceptions to Missouri’s abortion ban and legalizing abortion up to 12 weeks.

In an interview with the Missouri Independent, Corley said, “We formed this organization because we want to restore access to abortion, and having two initiatives on the ballot is a sure-fire way to make sure that doesn’t happen. We don’t want to be a spoiler.”

In Missouri, abortion is banned with limited exceptions due to a state law that went into effect in 2022.

Currently, Maryland and New York have abortion-related ballot measures certified for the ballot in 2024, while Florida has an amendment that has qualified for the 2024 ballot, pending a decision from the Florida Supreme Court. At least 14 other potential measures could appear on the ballot.

Below is the list of certified measures that will appear on the ballot, as well as potential measures that could appear on the ballot in 2024.

Certified abortion-related ballot measures in 2024

Florida

In Florida, Amendment 4 qualified for the ballot. Amendment 4 would provide a constitutional right to abortion before viability or when necessary to protect the woman’s health, as determined by the woman’s healthcare provider. The Florida Supreme Court is reviewing the initiative.

  • Current law: Florida Gov. Ron DeSantis (R) signed a bill, known as the Heartbeat Protection Act, on April 13, 2023, which was designed to ban abortions once a fetal heartbeat is detectable at around six weeks. The law is set to take effect if the Florida Supreme Court ruled that a previous bill signed by DeSantis in 2022 creating a 15-week abortion ban is constitutional. The 15-week abortion ban law has remained in effect pending the state supreme court ruling. Before this law taking effect in 2022, abortions were legal in Florida until 24 weeks. In 2012, voters rejected an amendment limiting public funds for abortions, and in 2004, they approved parental notification for minors seeking abortions.
  • Measure type: Initiated constitutional amendment
  • Measure support: Floridians Protecting Freedom is leading the campaign in support of the initiative. Supporters include the ACLU of Florida, League of Women Voters of Florida, and Planned Parenthood of Southwest and Central Florida.
  • Measure opposition: Florida Voice for the Unborn is leading the campaign in opposition to the initiative. Opponents include Susan B. Anthony Pro-Life America, the National Center for Life and Liberty, and Florida Voters Against Extremism.
  • State political context: Florida currently has a Republican trifecta. In the previous presidential election in 2020, Donald Trump (R) won with 51.22% of the vote.

Maryland

Maryland voters will be deciding a constitutional amendment that would guarantee a right to reproductive freedom, including the ability to prevent, continue, or end one’s own pregnancy. The ballot measure is designed to prohibit the constitutional right from being denied or infringed unless there is a compelling state interest, which would need to be achieved using the least restrictive means.

  • Current law: Currently, abortion is legal in Maryland until viability. Abortion is legal after viability if the woman’s life or health is endangered or there is a fetal anomaly.
  • Measure type: Legislatively referred constitutional amendment
  • Measure support: Freedom in Reproduction Maryland is leading the campaign in support of the amendment. Supporters include Gov. Wes Moore (D), Lt. Gov. Aruna Miller (D), the Maryland AFL-CIO, and the Maryland State Education Association.
  • Measure opposition: Health Not Harm MD is leading the campaign in opposition to the amendment. Opponents include the Maryland Catholic Conference, the Maryland Family Institute, and the Maryland Right to Life PAC.
  • State political context: Maryland currently has a Democratic trifecta. In the previous presidential election in 2020, Joe Biden (D) won with 65.36% of the vote.

New York

New York voters will be deciding on a constitutional amendment that would prohibit the denial of rights to an individual based on their “ethnicity, national origin, age, [and] disability,” as well as their “sex, including sexual orientation, gender identity, gender expression, pregnancy, pregnancy outcomes, and reproductive healthcare and autonomy.” The measure was referred to the ballot by the New York State Legislature.

  • Current law: New York allows for an abortion up to 24 weeks of pregnancy. Abortion is permitted after 24 weeks if the fetus is not viable or if the pregnant person’s life or health (including mental health) is at risk.
  • Measure type: Legislatively referred constitutional amendment
  • Measure support: New Yorkers for Equal Rights is leading the campaign in support of the initiative. Supporters of the amendment include Gov. Kathy Hochul (D), U.S. Sen Kirsten Gillibrand (D), the League of Women Voters of New York, and the Planned Parenthood Action Fund.
  • Measure opposition: Opponents of the amendment include the New York State Catholic Conference.
  • State political context: New York currently has a Democratic trifecta. In the previous presidential election in 2020, Joe Biden (D) won with 60.87% of the vote.

Potential abortion-related ballot measures in 2024

Arizona

The Arizona for Abortion Access campaign is working to place a constitutional amendment on the ballot that would establish a state constitutional right to abortion that the state may not interfere with before the point of fetal viability.

  • Number of signatures needed: 383,923 valid signatures
  • Signature deadline: July 4, 2024

Arkansas

The Arkansans for Limited Government campaign is working to place a constitutional amendment on the ballot that would prohibit laws or policies restricting abortion access within 18 weeks from conception; or in cases of rape, incest, or fatal fetal anomaly; or when abortion is needed to protect the life or health of the mother as determined by a physician.

  • Number of signatures needed: 90,704 valid signatures
  • Signature deadline: July 5, 2024

Colorado

Colorado voters may decide on an initiated state statute that would define living human child as a human being beginning at the moment of conception. It would prohibit abortion, provide for law enforcement, and provide penalties for individuals and facilities that perform abortions or provide surgical tools or medications to perform abortions.

  • Number of signatures needed: 124,238 valid signatures
  • Signature deadline: Aug. 5, 2024

Colorado voters may also decide on a ballot initiative that would prohibit the state or local governments from denying or impeding the right to an abortion and allow abortion to be a covered service under health insurance plans.

  • Number of signatures needed: 124,238 valid signatures
  • Signature deadline: Aug. 5, 2024

Iowa

The Iowa State Legislature may refer a constitutional amendment to the ballot that would state that the constitution does not provide a right to abortion or require the funding of abortion. The amendment already passed in the 2021-2022 session, and needs to pass again in the 2023-2024 session. The Iowa State Legislature has a Republican majority in both the House and Senate.

  • Majority requirement needed: Simple majority in both chambers of the state legislature in two consecutive legislative sessions.

Maine

The Maine State Legislature may refer a constitutional amendment to the ballot that would provide for the right to personal reproductive autonomy. The amendment was introduced to the Maine State Senate as Senate Bill 780 and has yet to pass either chamber.

  • Majority requirement: A two-thirds majority (66.67%) vote of the state legislature during one legislative session. Both the House and Senate in Maine have a Democratic majority.

Missouri

The Missourians for Constitutional Freedom campaign is working to place a constitutional amendment on the ballot that would provide the right to reproductive freedom, and provide that the state legislature may enact laws that regulate abortion after fetal viability.

  • Number of signatures needed: 171,592 valid signatures
  • Signature deadline: May 5, 2024

Montana

Montana voters may decide on a constitutional amendment that would provide for the right to make and carry out decisions about one’s own pregnancy, including the right to abortion.

  • Number of signatures needed: 60,359 valid signatures
  • Signature deadline: June 21, 2024

Nebraska

The Protect Our Rights campaign is working to place a constitutional amendment on the ballot that would establish a right to abortion until fetal viability.

  • Number of signatures needed: 124,465 valid signatures
  • Signature deadline: July 5, 2024

Nebraska voters may also decide on a state statute that would prohibit abortion procedures and drugs except in cases to preserve the life of the mother.

  • Number of signatures needed: 87,126 valid signatures
  • Signature deadline: July 5, 2024

Nevada

The Nevadans for Reproductive Freedom campaign is working to place a constitutional amendment on the ballot that would establish the right to an abortion. The measure would provide for the state to regulate abortion after fetal viability, except where medically indicated to protect the life, physical health, or mental health of the pregnant individual.

  • Number of signatures needed: 102,362 valid signatures
  • Signature deadline: June 26, 2024

Pennsylvania

The Pennsylvania State Legislature may refer a constitutional amendment to the ballot that would say that the Pennsylvania Constitution grants no right to a taxpayer-funded abortion or any other right relating to abortion. The amendment already passed in the 2021-2022 legislative session and would need to pass the current session. The Pennsylvania House of Representatives went from a Republican majority to a Democratic majority in the November 2022 election.

  • Majority requirement needed: Simple majority in both chambers of the state legislature in two consecutive legislative sessions.

South Dakota

Dakotans for Health is working to place a constitutional amendment on the ballot that would make abortion legal in the state with regulations after the first and second trimesters.

  • Number of signatures needed: 35,017 valid signatures
  • Signature deadline: May 7, 2024

Wisconsin

The Wisconsin State Legislature may refer a state statute to the ballot that would prohibit abortions after 14 weeks gestation, except in the case of a medical emergency. The amendment passed the Wisconsin House of Representatives on January 25, 2024. Both the House and Senate have a Republican majority.

  • Majority requirement needed: A simple majority vote of the state legislature during one legislative session.

Where did abortion appear on the ballot since 2022?

Following the Dobbs v. Jackson Women’s Health Organization U.S. Supreme Court decision that overturned Roe v. Wade in 2022, seven abortion-related measures appeared on the ballot. 

In 2022, there were six ballot measures addressing abortion — the most on record for a single year. Measures were approved in California, Michigan, and Vermont. Measures were defeated in Kansas, Kentucky, and Montana. The most recent abortion-related ballot measure to be passed by voters was Ohio Issue 1, which voters approved in Nov. 2023.

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