Plain-Language Guide
Understanding the U.S. Constitution
Written in 1787 and in effect since 1789, the Constitution sets up the structure of the federal government and defines the powers it holds and the limits it must respect.
How the Constitution Is Organized
The document has three main parts: a short Preamble that states its purpose, seven Articles that build the government, and the Amendments that have updated it over time.
- Article I — Legislative Branch: Creates Congress, made up of the House and the Senate, and gives it the power to make laws.
- Article II — Executive Branch: Establishes the President to carry out and enforce the nation’s laws.
- Article III — Judicial Branch: Creates the Supreme Court and the federal court system to interpret the laws.
- Articles IV-VII: Cover the relationships between the states, the process for adding amendments, and the ratification of the Constitution itself.
Key Principles
- Separation of Powers: Divides authority among the legislative, executive, and judicial branches.
- Checks and Balances: Lets each branch limit the powers of the others.
- Federalism: Shares power between the national government and the states.
- Popular Sovereignty: Roots the government’s authority in the consent of the people.
Why It Matters
The Constitution is the supreme law of the United States. It has guided the country for more than two centuries while remaining open to change. Twenty-seven amendments have been added, beginning with the ten that make up the Bill of Rights.
- Read it in your languageEnglish, Simplified English, Spanish, French, Portuguese, and Haitian Creole.
- The Bill of Rights and AmendmentsExplore the first ten amendments and the freedoms they protect.
- Read the originalView the full text at the National Archives.
Explore more of America’s founding charters.