- Albert L. Sturm Papers, 1904/19881
- Alfred C. Payne Collection, 1917/20031
- Ann A. Hertzler Collection, 1863/2013, bulk 1974/20001
- Arthur B. Massey Papers, 1902/19611
- Arthur M. Squires Papers, 1888/1987, bulk 1940/19871
- Bernard L. Parsons Papers and Photographs, 1918/19421
- Byron Nelson Cooper Papers, 1925/19711
- C. Ernest Cooke Papers, 1920/19601
- Carol M. Newman Papers, 1897/19581
- Carol M. Newman, Jr., Papers, 1930/19871
- Charles Burchard Collection, 1935/19891
- Clarence Paul Miles Papers, 1902/19601
- Claudius Lee Papers, 1887/19541
- Clinton H. Cowgill Collection, 1916/19771
- Dayton M. Kohler Papers, 1889/19711