Collection
- Custance-Douglas correspondence, 1902-19131
- D. Angel Cuesta collection, Acquisition date: 2/13/2007, bulk 1858-19361
- Dana A. Dorsey Collection, 1900-1966, Date acquired: 10/18/19991
- Daniel Family Papers, 1830-1927, Date acquired: 00/00/1984, bulk 1830-18791
- Daniel M. Johnson Collection, 1788-20021
- David Kirby Rare Book Collection, 1861-20161
- David O. True collection, 1450-1992, Date acquired: 06/00/19801
- David Sellers Newspaper Collection, 1837-19031
- Degen Playbill Collection, 1895-20231
- Derna DePamphilis Music Collection, 1885-1962, bulk 1935-19501
- Derrick Joshua Beard Collection, Circa 1854-19861
- Deschenes, Paul, Papers, 1900-1970, Date acquired: 10/00/19841
- Dime Novels Collection, 1861-1942, bulk 1873-19271
- Donald Brenham "D.B." McKay collection, 1880-1980, Date acquired: 12/13/20101
- Dr. Heather Frazer and Dr. John O'Sullivan Research Collection, 1871 - 20061
- Dr. John O'Sullivan Faculty Papers, 1831-1999, bulk 1940-19801
- Dr. Mark F. Boyd Collection, 1516-1965, Date acquired: 04/03/1967, Date acquired: 04/01/19681
- Dr. Samuel A. Portnoy Faculty Papers Collection, 1886-20031
- Dr. Walter Wadepuhl Faculty Papers Collection, 1781-19891
- Eartha M. M. White Papers, 1831-19741