- About the Main Reading Room
- The Library's principal reference and
book service point for the general collections.
- Local History & Genealogy Reference Services
- The Library has one of the world's premier collections of U.S. and foreign genealogical and local historical publications.
- Main Reading Room Reference Collection
- About the 70,000-volume general reference collection
on the Main Reading Room's open shelves.
- Microform and Electronic Resources Center (LJ-139, the former Computer Catalog Center)
- The Library's principal service point for
searching the online catalog, subscription
databases, CD-ROMs, and the Internet.
- Virtual Programs & Services
- Ask questions about the Library’s digital collections; browse electronic guides and bibliographies to the Library’s digital resources; and view a variety of webinars and video conferences.
Why You Should Come to the Main Reading Room of the Library of Congress to Begin Your Research! A transcript of the above video is available.
How to Find Stuff at the Largest Library in the World! A transcript of the above video is available.
101 Independence Ave. SE
Thomas Jefferson Bldg, LJ 100
Washington, D.C. 20540-4660
Telephone: (202) 707-3399
Map showing location
Monday, Wednesday, Thursday:
8:30am - 9:30pm
Tuesday, Friday, Saturday:
8:30am - 5:00pm
Closed Sunday & Federal Holidays
Ask a Librarian
to ask the reference staff a question about the general
Information for Researchers
Find out about research orientations, reader registration,
online and card catalogs, how to request
materials and other Library policies.
Bibliographies and Guides
Full text published guides for the Library's general collections. Our latest addition: Finding British Parliamentary Publications at the Library of Congress