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The Library of Congress occupies three buildings on Capitol Hill. The Thomas Jefferson Building (1897) is the original separate Library of Congress building. (The Library began in 1800 inside the U.S. Capitol.) The John Adams Building was built in 1938 and the James Madison Memorial Building was completed in 1981. Other facilities include the High Density Storage Facility (2002) at Fort Meade, Md., and the Packard Campus for Audio Visual Conservation (2007) in Culpeper, Va.

An agency of the legislative branch of the U.S. government, the Library includes several internal divisions (or service units), including the Office of the Librarian, Congressional Research Service, U.S. Copyright Office, Law Library of Congress, Library Services, and National and International Outreach. You can download a PDF of the Library's organizational chart. Adobe Acrobat Reader is required to view this document.

The Library of Congress
101 Independence Ave, SE
Washington, DC 20540

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Today's Library of Congress is an unparalleled world resource. The collection of more than 162 million items includes more than 38.6 million cataloged books and other print materials in 470 languages; more than 70 million manuscripts; the largest rare book collection in North America; and the world's largest collection of legal materials, films, maps, sheet music and sound recordings.

More about the Library's Collections

Year 2015 at a Glance

In Fiscal Year 2015 (October 2014 to September 2015), the Library of Congress ...

Responded to more than 1 million reference requests from Congress, the public and other federal agencies and delivered approximately 20,540 volumes from the Library’s collections to congressional offices.

Registered 443,812 claims to copyright through its U.S. Copyright Office

Circulated nearly 22 million copies of Braille and recorded books and magazines to more than 862,000 blind and physically handicapped reader accounts

Circulated nearly 900,000 items for use within the Library

Preserved more than 9 million items from the Library's collections

Recorded a total of 162,477,060 physical items in the collections, including:

  • 24,055,745 cataloged books in the Library of Congress classification system
  • 14,613,415 items in the nonclassified print collections, including books in large type and raised characters, incunabula (books printed before 1501), monographs and serials, bound newspapers, pamphlets, technical reports, and other print material
  • 123,807,900 items in the nonclassified (special) collections, including:
    • 3,601,323 audio materials, (discs, tapes, talking books, other recorded formats)
    • 70,296,299 manuscripts
    • 5,559,470 maps
    • 17,069,754 microforms
    • 1,758,713 moving images
    • 7,166,307 items of sheet music
    • 14,974,472 visual materials, as follows:
      • 14,200,418 photographs
      • 106,676 posters
      • 667,378 prints and drawings
    • 3,381,592 other items, (including machine-readable items)

Welcomed more than 1.6 million onsite visitors and recorded 86.1 million visits and 482.5 million page views on the Library's web properties. At year's end, the Library's online primary-source files totaled 60.9 million.

Employed 3,094 permanent staff members

Operated with a total fiscal 2015 appropriation of $630.8 million, including the authority to spend $39.9 million in receipts