- C. L. Worthington Papers, 1752/19381
- Carleton Custer Pierce (1877-1958) Papers, 1840/19551
- Chappelear Collection, 1788/19591
- Charles Brinkman, Collector, Papers, 1852/19521
- Charles Brinkman, Collector, Papers, 1868/19381
- Chesapeake Western Railway Company Records, 1916/19821
- Civil War Collection, 1856/19381
- Clarence Edwin Smith (1885-1959) Papers, 1787/19572
- Clarence L. Musgrave Papers, 1839/19371
- Cosmetics Sales Book, 1918/19191
- Courtney Family Papers, 1804/19201
- 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