The Library of Congress Archives are the collected records of the Library of Congress that are administered by the Manuscript Division. Beginning in 1897, with the establishment of a separate department for manuscript materials, letterbooks, borrowing ledgers, and other documentary material from offices throughout the Library have been transferred to and made available in the Manuscript Division's reading room.

The archives also include papers donated by Library of Congress staff members. In a few cases, the Manuscript Division has purchased material for retention in the archives. The archives include eighty-three individual groups or series of records that document the activities, staff, and collections of the Library of Congress.