The Patrick Tiberi Papers consist of materials from Tiberi’s political career in the United States House of Representatives (2001-2018), as well as from his time in the Ohio House of Representatives (1993-2000), and limited personal correspondence. Materials primarily date to his time in Congress, and include information used by his staff to run his district and federal offices, including yearly Member’s Representational Allowance information, staff handbooks, schedules, and policies. Also included in the collection are materials related to the legislative work done by Tiberi in Congress, such as a selection of correspondence, Dear Colleague letters received, subject files, financial disclosures, and materials related to bills sponsored or cosponsored by Tiberi. His constituent services while in Congress are shown local case files, as well as associated planning materials and correspondence, local subject files, and comment cards and planning information for his district office hours. Also included are audiovisual materials on VHS videocassette, DVD, and compact disc that show Tiberi’s media appearances on the local news and other public appearances. The collection contains ephemera from Tiberi’s political campaigns for the United States House of Representatives, as well as a selection of awards and memorabilia awarded to Tiberi throughout his whole political career. Also included are clippings files for the entirety of Tiberi’s time in federal office. Folder and item titles were taken from descriptions written on original folders used by Tiberi's staff, or text of the items themselves. The collection is dated 1993-2018, with the bulk of material dating 2000-2017.

The Ralph S. Regula Papers consist of materials dating from circa 1970s to 2000s. The collection represents the 36-year public service career of Ralph Regula as a Republican congressman in the U.S. House of Representatives for the 16th District of Ohio. All materials in the collection were compiled by the office of Congressman Regula, with the exception of the items pertaining to his various election campaigns, which were compiled by his campaign committees. Though many materials from his time in Congress during the 1970s are not included in this collection, the collection does document Regula’s committee work from the 1980s until his retirement in January 2009, especially his work as chairman of two subcommittees of the House Committee on Appropriations.

The collection includes materials showing Regula's work on the Appropriations Committee and subcommittees underneath it, such as budgets, congressional hearing records, committee reports, and subject files relating to issues dealt with by the subcommittees; similar files are found for other congressional committees Regula served on, such as the Budget Committee and the Select Committee on Aging. Also included is information on other projects and commissions Regula was involved with while in office, such as the steel caucus, trade, and the Martin Luther King, Jr. Federal Holiday Commission. Further series in the collection concern bills sponsored or co-sponsored by Regula, as well as his voting record.

The collection also contains materials such as constituent service files, media relations files, travel files, campaign files, and audiovisual materials, all of which serve to represent the work done by Regula outside of the chamber of the House of Representatives. Included in these series is publications for constituents, press releases, the "Regula Report" newsletter written by Regula, campaign ephemera, office files, newspaper clippings, and constituent mail. Finally, the collection contains audiovisual materials recording Regula's radio campaign advertisements, appearances on news programs, and public service announcements.