The papers of Philip B. Hill consist of nineteen boxes of manuscripts dating from 1967 to 1979. They are arranged chronologically within an alphabetical sequence (with a small additional grouping at the end). These papers document Hill's legislative career with correspondence and subject files. There are approximately six boxes of correspondence, which include letters from: Charles Grassley, John C. McDonald, Arthur A. Neu, Robert D. Ray, and Neal Smith.

Subject files include items such as legislative council minutes, various study committee research and reports (including those concerning livestock laws, penal corrections systems, and land use), clippings, and house files. Some of the topics range from abortion to the courts and juvenile justice or from child care to education. Materials regarding the Republican party include newsletters, party platforms, and central committee papers. There are also records of his campaigns, such as expenditures and other financial disclosures.