The bulk of Catt's papers are in the Library of Congress. There is related material in the Josephine Schain Papers in the Sophia Smith Collection at Smith College; the Rare Books and Manuscripts Department of the New York Public Library; the Woman's Rights Collection in the Schlesinger Library at Harvard University; the Bryn Mawr College Library; the Northwestern University Library; the National Woman Suffrage Collection at the Library of Congress; and the Susan B. Anthony House in Rochester, New York. The New York Public Library has an incomplete set of stenographic reports on the annual meetings of the Conference on the Cause and Cure of War, 1925-33.