Personal correspondence, speeches, subject files, photographs, and printed and miscellaneous material of Hogan. The correspondence, speeches, and other material relate primarily to his activities as District Attorney, and to his unsuccessful campaign for the U.S. Senate, 1958. The papers also reflect Hogan's deep concern for Columbia University, as a Trustee and a member of numerous alumni committees. Among the major correspondents are Harry J. Carman, Dwight David Eisenhower, Robert F. Kennedy, Arthur Hays Sulzburger, and Herbert Bayard Swope.

Letters, documents, clippings, and printed matter related to the work of the Citizens Union of New York, including correspondence, memoranda, and reports which survey, analyze, and criticize bills introduced in the state legislature and city council; 244 boxes of "Who's Who" biographies of candidates for city and state offices; files of campaign and election materials; records of affiliated "good government" organizations in New York City; and extensive financial records.