- Dan H. Pletta Papers, 1942/199616
- David H. Sutton, Compiler, Research Papers regarding Helvetia, West Virginia, 1835/2010, bulk 1890/19793
- David Weimer, Collector, Seneca and Houze Glass Records, 1900/200519
- Davis & Davis Law Firm Records, 1895/191321
- Davis Coal and Coke, Coal Mining and Railroad Company, Records, 1890/198028
- Dolores Fleming, Research Papers regarding the Glass Industry, South Park Homes, and Other Topics, 1896/20163
- Don Knotts, Actor, Scripts, Sound Recordings, and Other Material, 1946/2006, bulk 1966/200011
- Dr. John Renton, Professor of Geology, Papers and Educational Materials, 1928/20086
- Dr. William A. Neal Papers, 1880/201610