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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.

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, the Office of Strategic Initiatives and the Office of Support Operations. You can also 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 160 million items includes more than 37.8 million cataloged books and other print materials in 470 languages; more than 69.6 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 2014 at a Glance

In Fiscal Year 2014 (October 2013 to September 2014), the Library of Congress ...

Responded to more than 593,000 congressional reference requests. In addition, online research products were accessed on the CRS website by congressional clients on more than 656,000 occasions. Approximately 20,600 volumes from the Library’s collections were delivered to congressional offices.

Registered 476,298 claims to copyright through its U.S. Copyright Office

Provided reference services to 467.000 individuals in-person, by telephone, and through written and electronic correspondence

Circulated more than 23 million copies of Braille and recorded books and magazines to more than 890,000 blind and physically handicapped reader accounts

Circulated more than 982,000 items for use within the Library

Preserved more than 7 million items from the Library's collections

Recorded a total of 160,775,469 physical items in the collections, including:

  • 23,892,068 cataloged books in the Library of Congress classification system
  • 14,072,971 books in large type and raised characters, incunabula (books printed before 1501), monographs and serials, bound newspapers, pamphlets, technical reports, and other printed material
  • 122,810,430 items in the nonclassified (special) collections. These included:
    • 3,567.336 audio materials, (discs, tapes, talking books, other recorded formats)
    • 69,626,842 manuscripts
    • 5,539,890 maps
    • 16,912,491 microforms
    • 1,771,595 moving images (including films, TV broadcasts, DVDs)
    • 7,113,157 items of sheet music
    • 14,908,337 visual materials, including:
      • 14,137,584 photographs
      • 106,309 posters
      • 664,444 prints and drawings
    • 3,370,782 other items, (including machine-readible items)

Welcomed more than 1.45 million onsite visitors and recorded 78.1 million visits and 489.3 million page views on the Library's web properties. At year's end, the Library's online primary-source files totaled 52.3 million.

Employed 3,138 permanent staff members

Operated with a total fiscal 2014 appropriation of $618.8 million, including the authority to spend $39.8 million in receipts