University Library: U.S. Government Information: United States Constitution

U.S. Government Websites

U.S. Constitution at the National Archives
Text of the Constitution plus images of the original and links to additional information.
U.S. Constitution at the Senate Website
Provides links to two annotated versions of the Constitution.
Constitution of the United States of America: Analysis and Interpretation
Official Senate Document from the Government Publishing Office.
Constitution Annotated
A version from Congress.gov with regularly updated commentary.

U.S. Constitution at the Legal Information Institute
Browsable web version from Cornell Law School. Also includes a "hypertext interpretation" of the Annotated Constitution.
The American Constitution - A Documentary Record
Historical documents from The Avalon Project at Yale Law School.
The Founders' Constitution
"An invaluable aid to all those seeking a deeper understanding of one of our nation's most important legal documents."
Interactive Constitution
Interpretation and discussion at the National Constitution Center website.