Home/USA/Constitution
Supreme Law of the Land

The United States Constitution Portal

Complete legal references, simplified breakdowns, and practical guides to U.S. Articles and Amendments.

The Preamble

"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defense, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution for the United States of America."

Adopted in 1787, the Preamble serves as the mission statement for U.S. democracy.

Articles of the Constitution

Explore the structural articles detailing the layout of the federal government.

Article IArticle
The Legislative Branch

Establishes the powers, limits, and structure of the U.S. Congress (Senate & House of Representatives).

Read Article →
Article IIArticle
The Executive Branch

Establishes the office of the President, the qualifications, powers, and electoral college rules.

Read Article →
Article IIIArticle
The Judicial Branch

Establishes the U.S. Supreme Court, lower federal courts, and details the scope of judicial power.

Read Article →
Article IVArticle
State Relations & Powers

Outlines the relationships between states, the admission of new states, and the Full Faith and Credit clause.

Read Article →
Article VArticle
The Amendment Process

Details the strict double-pathway procedures required to formally change or add amendments to the U.S. Constitution.

Read Article →
Article VIArticle
Federal Supremacy & Oaths

Establishes the Constitution as the supreme law of the land, binds all officers by oath, and bans religious tests.

Read Article →
Article VIIArticle
Ratification Process

Outlines the historical ratification requirements (9 out of 13 states) to bring the Constitution into effect in 1787.

Read Article →

Key Constitutional Amendments

Guides on the most searched amendments impacting individual civil rights and citizenship.

1st AmendmentAmendment
Freedom of Speech & Religion

Guarantees freedom of religion, speech, press, assembly, and the right to petition the government.

Read Amendment →
4th AmendmentAmendment
Search & Seizure Rules

Protects citizens against unreasonable searches and seizures, outlining strict warrant requirements.

Read Amendment →
14th AmendmentAmendment
Birthright Citizenship & Equal Protection

Contains the Citizenship Clause, guaranteeing birthright citizenship for children of visa holders.

Read Amendment →

Related Naturalization & Civics Resources

👉 USCIS Civics Practice Quiz Simulator →
👉 Form N-400 Eligibility Calculator →
👉 Non-Citizen Constitutional Rights Guide →
Official U.S. Government References

• Library of Congress Constitution Annotated (Constitution.Congress.gov): constitution.congress.gov
• U.S. National Archives Founding Documents: archives.gov/founding-docs
• USCIS Citizenship Educational Resources: uscis.gov/citizenship