- Beaven brass rubbings collection, 1900/19991
- Ben Russak papers, 1935/19428
- Bernard Rosenblatt Regional Theatre Council for Northern California and Nevada papers, 1938/197916
- Broadway souvenir theatre programs collection, 1942/19973
- C-SPAN records, 1809/2012, bulk 1978/20124
- C. Harrison Mann, Jr. Map Collection, 1579/19611
- C. Harrison Mann, Jr. map collection, 1579/19611
- C. Harrison Mann, Jr. papers, 1832/19797
- Carol D. Litchfield microbiology collection1
- Carol D. Litchfield microbiology collection, 1924/19971
- Carol R. Lubin papers, 1960/19812
- Charles Baptie photograph collection7
- Charles Lietwiler transportation collection, 1903/20053
- Charles Rodrigues playbill collection, 1879/200910
- Chester H. McCall papers, 1931/19473