- Charles F. Hulvey papers, 1888/19401
- Charles N. Brown Medical Journal, 1894/19051
- Charles R. Williams, Collector, Papers, 1834/19051
- Charles Triplett O'Ferrall Papers, 1856/1904, bulk 1867/18931
- Civil War Collection, 1856/19381
- Clarence Edwin Smith (1885-1959) Papers, 1787/19572
- Clarence L. Musgrave Papers, 1839/19371
- Collection of the Hulver Family and Baughman Settlement, Hardy County, West Virginia, 1800/2013, bulk 1830/19501
- Courtney Family Papers, 1804/19201
- Creed F. Flanary Account Books, 1871/19081
- Daniel Stickley Account Books, 1834/19121
- David C. Irwin Collection, 1869/1937, bulk 1887/19371
- David W. Gall (1851-1939) Papers, 1884/19351
- Davis Family Papers, 1800/19411
- Davis and Bower City Meat Market (Charleston, Ill.) Account Book, 1875-1878, 1875/19781