How to Use the Library of Congress for Historical Research

By Randy Salars

The Library of Congress holds over 170 million items โ€” maps, manuscripts, newspapers, photographs, sound recordings, and printed materials. Much of this collection is accessible digitally, for free, from anywhere in the world.


What Are the Key Collections for Researchers?

Geography & Map Division

loc.gov/maps

5.5 million maps including Sanborn fire insurance maps, Civil War battlefields, and historical atlases. High-resolution scans available for download.

Chronicling America

chroniclingamerica.loc.gov

Millions of digitized newspaper pages from 1770 to 1963. Full-text searchable OCR. Completely free.

Manuscript Division

loc.gov/manuscripts

Personal papers of presidents, military leaders, scientists, and other notable figures. Finding aids available online.

Prints & Photographs

loc.gov/pictures

Over 17 million visual items โ€” photographs, drawings, prints, and posters. Many pre-date photography.

American Memory

memory.loc.gov

Curated digital collections of historical documents, photographs, maps, and audio recordings organized by theme.

Veterans History Project

loc.gov/vets

First-person accounts from veterans of all wars. Includes oral histories, diaries, and photographs.


What Are Some Tips for Effective LOC Research?

  • โ€ข Use the catalog (catalog.loc.gov) โ€” Search by keyword, subject, author, or date range
  • โ€ข Browse finding aids โ€” Manuscript collections have detailed inventories listing every folder and item
  • โ€ข Download high-res images โ€” Most digital items can be downloaded at full resolution for research use
  • โ€ข Ask a Librarian โ€” LOC reference librarians respond to email inquiries and can guide your research remotely
  • โ€ข Visit in person โ€” Reader cards are free and grant access to reading rooms and unrestricted collections

Put LOC Research Into Practice

The Treasure Hunter's Research Guide teaches you how to effectively use LOC and other archives as part of a complete research methodology.

Get the Research Guide โ†’

Related Pages

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