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Explore the world's largest library with online and in-person access to historic collections, exhibitions, events and more. Learn about the Library's role in U.S. history, culture and copyright.
- Chronicling America
Library of Congress
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The Library of Congress is the largest library in the world,...
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Thomas Jefferson's Library. Southwest Pavilion, Second...
- Chronicling America
The Library of Congress (LOC) is a research library in Washington, D.C., that serves as the library and research service of the U.S. Congress and the de facto national library of the United States. Founded in 1800, the library is the United States's oldest federal cultural institution.
- 3,105
- 173 million items
- April 24, 1800; 223 years ago
- Washington, D.C.
Apr 21, 2024 · Library of Congress, the de facto national library of the United States and the largest library in the world. Its collection was growing at a rate of about two million items per year; it reached more than 170 million items in 2020.
- James H. Billington
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Congress.gov is the official website for U.S. federal legislative information. It provides access to bills, laws, reports, hearings, calendars, and more from the Library of Congress.
Research guides to the Library's collections, as well as subject guides prepared by Library of Congress staff, are listed below. More online guides covering other Library of Congress collections are available via the LC Bibliographies, Research Guides and Finding Aids page.