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The Library of Congress is the de facto national library of the United States and the largest library in the world. It serves as the research arm of the U.S. Congress and is a premier public institution, offering access to a rich, diverse, and enduring source of knowledge to inform, inspire, and engage intellectual and creative endeavors. Its collections are universal, not limited by subject, format, or national boundary, and include research materials from all parts of the world and in more than 470 languages.
Serves as the main research and administrative center, housing vast collections, reading rooms, exhibition spaces, and offices for library staff, the Librarian of Congress, and the U.S. Copyright Office.
The Thomas Jefferson Building is renowned for its Gilded Age architecture, grand Main Reading Room, and elaborate artwork. The James Madison Memorial Building is one of the largest library buildings in the world. The John Adams Building features Art Deco design.
A mission-driven environment focused on scholarship, preservation, and public service, with a diverse workforce of librarians, archivists, curators, subject-matter experts, and administrative staff dedicated to acquiring, preserving, and providing access to knowledge.
The headquarters is not only the operational hub for the world's largest library but also a significant cultural and architectural landmark in the U.S. capital, symbolizing the nation's commitment to knowledge, learning, and cultural heritage.
The Library of Congress maintains a global presence primarily through its six overseas offices located in Cairo (Egypt), Jakarta (Indonesia), Islamabad (Pakistan), Nairobi (Kenya), New Delhi (India), and Rio de Janeiro (Brazil). These offices acquire research materials from their respective regions for the Library's collections and for other American libraries through the Cooperative Acquisitions Program. This network ensures comprehensive global coverage in its collection development, making it a truly international resource.
101 Independence Ave SE
Washington
D.C.
United States
Address: 19053 Mount Pony Rd, Culpeper, VA 22701
Serves as the primary site for the Library's audio-visual collection stewardship, including archival storage, preservation laboratories, and digital conversion.
Address: Specialized storage facility on Fort Meade military base (not open for general public access)
Provides secure, long-term archival storage for millions of books, bound periodicals, and other paper-based materials.
Address: American Center, 24 Kasturba Gandhi Marg, New Delhi 110001, India (c/o U.S. Embassy)
Facilitates the acquisition of scholarly and cultural materials from India, Nepal, Bhutan, Bangladesh, Sri Lanka, and Maldives.
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As of April 2025, Library of Congress' leadership includes:
Library of Congress has been backed by several prominent investors over the years, including:
The Library of Congress has seen key leadership transitions in the past year, notably with a new Director for the Congressional Research Service and an acting appointment for the Deputy Librarian for Library Collections and Services following a retirement.
Discover the tools Library of Congress uses. Highperformr reveals the technologies powering your target accounts — helping your sales, marketing, and GTM teams prioritize smarter and close faster.
The Library of Congress primarily uses the email format combining the first initial of an employee's first name with their full last name, followed by '@loc.gov'. For example, an employee named Jane Doe would likely have the email address jdoe@loc.gov. Variations may exist for specific departments or roles, and some staff may use a four-letter code derived from their last name plus their first initial.
[first_initial][last]@loc.gov
Format
jdoe@loc.gov
Example
80%
Success rate
loc.gov • May 21, 2024
The Library of Congress announced a new initiative, the National Screening Room, which will regularly showcase rarely seen films from its vast collection, offering public access to unique cinematic treasures both online and in its Pickford Theater....more
loc.gov • May 16, 2024
The Library of Congress has acquired the extensive archive of renowned American photographer Ansel Adams, including thousands of photographic prints, negatives, correspondence, and writings, significantly enhancing its unparalleled photography collections....more
blogs.loc.gov • April 24, 2024
The Library of Congress marked its 224th birthday, reflecting on its history since its founding on April 24, 1800, and its ongoing mission to acquire, preserve, and provide access to a universal collection of knowledge and creativity for Congress and the American people....more
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