Research Guides: Constitutions: U.S., State & Foreign: U.S. Constitution

Constitution Day

Constitution Day and Citizenship Day, Library of Congress
Constitution Day is observed each year on September 17 to commemorate the signing of the Constitution on September 17, 1787.

Read the Consitution of the United States from the National Archives and Records Administration

The Constitution of the United States
Learn more about the document and its framers from the National Archives
Constitution Annotated
Provides a comprehensive overview of how the Constitution has been interpreted over time. This site offers upgraded search capabilities.
Constitutional Amendments: Encyclopedia of the People, Procedures, Politics, Primary Documents Relating to the 27 Amendments (2017)
Online. This text illustrates how the US Constitution has changed since its ratification in 1789.
Encyclopedia of the American Constitution (2000)
Six-volume online and print set offers comprehensive coverage of all aspects of constitutional law, as well as biographies of people who have had an impact on our government's legal framework (Supreme Court justices, presidents, cabinet members, lawyers, and more). Also covers judicial decisions handed down by the Supreme Court.