- C-SPAN records, 1809/2012, bulk 1978/2012240
- C. Barrett Graham papers, 1967/20161
- C. Edwin Baker Papers, 1886/2013, bulk 1970/20091
- C. Ernest Edgar III papers, 1956/20101
- C. James Gleason Photography Collection, 1987/20085
- Cadet Life, Organizations, and Activities, 18451
- Calendar Collection, 1980/20051
- Calendars Collection, 1910/20131
- Callaway Family Genealogical Materials, 2000/20061
- Camp Okahahwis collection, 1925/20096
- Canterbury Association Records, 1954/2013, bulk 1980/20004
- Capital Club of Williamsburg Records, 1960/2015, bulk 1970/20006
- Carl A. "Pappy" Fehr papers, 1907/2012, bulk 1945/19742
- Carl Archacki papers, 1986/20041
- Carl F. Emswiller, Jr. papers, 1922/20092