Correspondence, photographs, published and unpublished writings by O'Malley, and material relating to his teaching activities, including student papers, class record books, and lectures. Correspondents include Willa Cather, Desmond Fitzgerald, Jacques Maritain, Edward Goerner, Edwin O'Connor, and Hannah Arendt.

Review of Politics correspondence, reports, memoranda, and press releases, 1994-2008; personal or Notre Dame correspondence, ephemera, curricula vitae, 1969-2005; correspondence, circulars, and printed material from the Program of Liberal Studies, 1979-2005; and teaching material, 1990s-2011.