- Albert L. Sturm Papers, 1904/19881
- Alfred C. Payne Collection, 1917/20031
- Ann A. Hertzler Collection, 1863/2013, bulk 1974/20001
- Antoine Gaujot and Julien E. Gaujot Papers, 1840/19991
- Arthur M. Squires Papers, 1888/1987, bulk 1940/19871
- Arthur Sibold Collection, 1964/19751
- Benjamin Cottrell Papers, 1910/19831
- Beulah O. Allen Collection, 1905/1992, bulk 1920/19701
- Byron Nelson Cooper Papers, 1925/19711
- C. David Loeks Papers, 1947/19971
- C. Eugene Rowe Papers, 1949/19871
- Carl George Krieger Papers, 1930/19681
- Carneal and Johnston Architectural Drawings, 1939/19681
- Carol M. Newman, Jr., Papers, 1930/19871
- Carrie T. Sibold Family Papers, 1912/1990, bulk 1974/19901