Declaration of Independence vs. Constitution: What’s the Difference?

The Declaration of Independence and the U.S. Constitution helped shape the United States, but they did different jobs. The Declaration explained why the thirteen colonies were separating from Great Britain. The Constitution established the framework of the federal government.

They also belong to different moments in American history: the Declaration was adopted in 1776, while the Constitution was drafted in 1787.

What Did the Declaration of Independence Do?

On July 4, 1776, the Continental Congress adopted the Declaration of Independence. It presented the colonies’ case for separation, described principles of government, and listed grievances against King George III.

Thomas Jefferson wrote the principal draft as part of a five-member committee. Other committee members and Congress contributed to the final text. Calling Jefferson its principal author is accurate; saying he produced the final document entirely alone leaves out that process.

The Declaration announced independence. It did not create the presidency, Congress, or the Supreme Court. The National Archives also distinguishes it from the other founding documents by explaining that it is not legally binding.

Why Was Another Governing Document Needed?

Independence and government organization were separate problems. Declaring a break with Britain did not settle how the states would work together.

Before the Constitution, the United States operated under the Articles of Confederation, which took effect in 1781. That system left considerable power with the states. The national government lacked important powers, including the ability to levy taxes directly.

Delegates gathered in Philadelphia in 1787 to address the country’s governing problems. Their work produced a new Constitution rather than simply an updated declaration of independence.

What Does the Constitution Do?

The Constitution lays out the structure and powers of the federal government. It establishes a legislative branch, an executive branch, and a judicial branch, while setting rules for their operation and relationships.

Its role is practical as well as foundational. When a question concerns the powers of Congress or the responsibilities of the president, the Constitution is the relevant starting document. When the question concerns the colonies’ stated reasons for leaving British rule, the Declaration is the relevant document.

Where Does the Bill of Rights Fit?

The Bill of Rights is part of the Constitution, not part of the Declaration of Independence. It consists of the first ten constitutional amendments, ratified on December 15, 1791.

These amendments include protections for speech, religion, the press, assembly, and petition, along with safeguards in criminal proceedings. They also address other rights and the division of powers.

This creates three useful dates to remember: 1776 for the Declaration, 1787 for the drafting of the Constitution, and 1791 for the ratification of the Bill of Rights.

A Quick Way to Tell Them Apart

Ask what question you are trying to answer:

Why did the colonies declare independence? Read the Declaration.
How is the federal government organized? Read the Constitution.
What do the first ten amendments protect? Read the Bill of Rights.

Recognizing those different purposes makes the documents easier to understand—and helps you avoid treating every founding-era question as a question about the same text.

Ready to practice? Play JOBSCRIB’s American History Challenge.

Sources and Further Reading

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Meta description: Learn how the Declaration of Independence, the U.S. Constitution, and the Bill of Rights differ in purpose, history, and role in American government.