Correspondence, diaries, speeches, writings, family papers, subject files, and other papers relating primarily to Borglum's artistic works, especially the Mount Rushmore National Memorial and the Stone Mountain Confederate Memorial. Also includes material relating to his activities in the Republican and Progressive parties, as a member of several aeronautics societies, and as a Freemason. Subjects include an investigation into federal government contracts with aeronautics industries during World War I, civic affairs including highway planning, and Indian affairs pertaining primarily to the Oglala Sioux Indians of Pine Ridge Indian Reservation, S.D. Correspondents include Henry Harley Arnold, Newton Diehl Baker, Calvin Coolidge, Josephus Daniels, Daniel Chester French, Warren G. Harding, Herbert Hoover, Harold L. Ickes, William Lyon Mackenzie King, Robert Todd Lincoln, Auguste Rodin, Franklin D. Roosevelt, Theodore Roosevelt, Fred W. Sargent, Jacob H. Schiff, Bernard Shaw, William Allen White, Woodrow Wilson, and Frank Lloyd Wright.

Also includes records of the Mount Rushmore National Memorial Commission. Records include correspondence, speeches, annual reports, financial reports, contracts, charts, blueprints, clippings, printed matter, and miscellany. Correspondents include John A. Boland, Gutzon Borglum, Lincoln Borglum, George W. Norris, Key Pittman, Franklin D. Roosevelt, Julius Rosenwald, Fred W. Sargent, and William Williamson.