The digital revolution has transformed access to primary sources for American historical research. The following digital archives provide access to millions of pages of documents, photographs, newspapers, and other historical materials that would have required years of archival travel to consult in previous generations.
Library of Congress Digital Collections
The Library of Congress offers an unparalleled range of digital collections, including historic newspapers through Chronicling America, manuscript collections, photographs, maps, and sound recordings. The Papers of prominent Americans, including the Abraham Lincoln Papers and the George Washington Papers, are fully digitized and searchable. These collections form an essential foundation for research in American political, social, and cultural history.
National Archives
The National Archives and Records Administration (NARA) preserves the permanently valuable records of the federal government, including census data, military records, court records, and presidential papers. The National Archives Catalog provides online access to millions of digitized documents and descriptions of holdings available for in-person research. Census records, available through subscription services such as Ancestry.com and FamilySearch, are essential sources for demographic and social history.
HathiTrust Digital Library
The HathiTrust Digital Library, a partnership of academic and research libraries, provides access to millions of digitized books and serials. HathiTrust's collections include extensive runs of historical periodicals, government documents, and published primary sources. The HathiTrust Research Center supports computational analysis of these collections, enabling text mining and other digital humanities approaches.
JSTOR and Academic Databases
JSTOR provides access to thousands of academic journals, books, and primary sources in history and related disciplines. While primarily a source for secondary scholarship, JSTOR's Early Journal Content and Primary Source Collections include valuable historical materials. Similar databases such as ProQuest Historical Newspapers and Gale Primary Sources offer digitized newspaper archives and document collections.