
The Iowa Constitution states that every ten years, starting in 1970, there is to be an automatic ballot referral on the Iowa ballot about whether to hold a constitutional convention. The Iowa State Legislature can also vote to put the question on the ballot. If constitutional amendments are adopted at the convention, they will be placed on the statewide ballot for voters to ratify or reject them. Once an amendment is on the ballot, it must be approved by a majority of the electors qualified to vote for members of the general assembly, voting thereon' in order to become part of the constitution. The last time voters approved a constitutional convention question was in 1996 in Hawaii, with 50.5% of the vote. The first proposed constitution for Iowa was rejected, but the second and third were ratified by voters.
| Characteristics | Values |
|---|---|
| Percentage of votes needed to ratify Iowa Constitution | A majority of the electors qualified to vote for members of the general assembly |
| Percentage of votes needed to propose revisions to the constitution | More than 50% |
| Percentage of votes needed to propose amendments to the constitution | More than 50% |
| Percentage of votes needed to approve a constitutional convention question | 50.5% |
| Average percentage of yes votes on the question | 35.91% |
| Average percentage of no votes on the question | 64.09% |
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What You'll Learn
- The Iowa Constitution requires a majority vote to ratify amendments
- The Iowa State Legislature can vote to put the question of a constitutional convention on the ballot
- The last time Iowa voters ratified a constitution was in 1857
- The average percentage of 'no' votes on the question of a constitutional convention was 64.09%
- The average percentage of 'yes' votes on the question of a constitutional convention was 35.91%

The Iowa Constitution requires a majority vote to ratify amendments
The Iowa Constitution has been amended several times, with the last amendment being ratified in 1996. The process of amending the Iowa Constitution begins with the state legislature, which can propose revisions or amendments to the constitution. If an amendment is adopted, it is then placed on the statewide ballot for voters to ratify or reject.
The Iowa Constitution has a unique feature where, starting in 1970 and every ten years thereafter, there is an automatic ballot referral on whether to hold a constitutional convention. This means that every ten years, Iowans have the opportunity to decide if they want to make changes to their constitution. If a majority of voters approve the convention, it will be held, and any amendments proposed at the convention will be placed on the statewide ballot for ratification or rejection.
The Iowa Constitution has a high bar for ratification, with a majority vote required. This ensures that any changes to the constitution reflect the will of the people and have broad support.
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The Iowa State Legislature can vote to put the question of a constitutional convention on the ballot
The Iowa Constitution has been ratified three times. The first proposed constitution was rejected, but the second and third were ratified by voters. The current, original Constitution of the State of Iowa was ratified in 1857. Since then, each of the five decennial constitutional convention questions has been rejected. The average percentage of no votes on the question was 64.09%, while the average percentage of yes votes was 35.91%.
The state legislature is allowed to propose revisions (not just amendments) to the constitution. If measures conflict, and they both get more than 50% of the vote, the one with the highest number of votes prevails. Ratified amendments take effect the day after the election.
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The last time Iowa voters ratified a constitution was in 1857
The Iowa Constitution states that, starting in 1970 and every ten years thereafter, there is to be an automatic ballot referral on the Iowa ballot about whether to hold a constitutional convention. The Iowa State Legislature can also vote to put the question on the ballot. If constitutional amendments are adopted at the convention, they will be placed on the statewide ballot for voters to ratify or reject them. Once an amendment is on the ballot, it must be approved by a majority of the electors qualified to vote for members of the general assembly for it to become part of the constitution.
Three constitutional conventions have been held in Iowa: in 1844, 1846, and 1857. The first proposed constitution was rejected, but the second and third proposed constitutions were ratified by voters.
In fourteen states, the question of whether to hold a constitutional convention is automatically referred to a statewide ballot without any requirement for a vote of the state legislature to place the question on the ballot.
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The average percentage of 'no' votes on the question of a constitutional convention was 64.09%
The Iowa Constitution states that every ten years, starting in 1970, there is to be an automatic ballot referral on the Iowa ballot about whether to hold a constitutional convention. The Iowa State Legislature can also vote to put the question on the ballot.
From 1970 to 2010, each of the five decennial constitutional convention questions were rejected. The average percentage of no votes on the question was 64.09%. The average percentage of yes votes was 35.91%.
If a constitutional convention is held and amendments are adopted, they will be placed on the statewide ballot for voters to ratify or reject them. Once an amendment is on the ballot, it must be approved by a majority of the electors qualified to vote for members of the general assembly for it to become part of the constitution.
The first proposed constitution was rejected, but the second and third were ratified by voters. In 1996, voters in Hawaii approved a constitutional convention question with 50.5% of the vote. However, this did not result in a convention being held. The last time a constitutional convention question resulted in a convention was in Rhode Island in 1984.
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The average percentage of 'yes' votes on the question of a constitutional convention was 35.91%
The Iowa Constitution states that, starting in 1970, and every ten years after that, there is to be an automatic ballot referral on the Iowa ballot about whether to hold a constitutional convention. The Iowa State Legislature can also vote to put the question on the ballot. If amendments are adopted at the convention, they are placed on the statewide ballot for voters to ratify or reject them. Once an amendment is on the ballot, it must be approved by a majority of the electors qualified to vote for members of the general assembly, voting thereon, in order to become part of the constitution.
The average percentage of yes votes on the question of a constitutional convention was 35.91%. The last time voters approved a constitutional convention question was in 1996 in Hawaii, with 50.5% of the vote. Although it was approved, it did not result in a convention being held. The last constitutional convention question that resulted in a convention being held was in Rhode Island in 1984.
Three constitutional conventions have been held in Iowa – in 1844, 1846, and 1857 – for the purpose of proposing constitutions for the state. The first proposed constitution was rejected, but the second and third were ratified by voters. The document proposed by the 1857 convention and ratified by the voters is the current, original Constitution of the State of Iowa.
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Frequently asked questions
A majority of votes are needed to ratify the Iowa Constitution.
Every ten years, starting in 1970, there is an automatic ballot referral on the Iowa ballot about whether to hold a constitutional convention.
The last time voters approved a constitutional convention question was in 1996 in Hawaii.
Three constitutional conventions have been held in Iowa—in 1844, 1846, and 1857.

























