Collection
- Boris Rabbot Papers, 1930-20122
- C. Martin Wilbur papers, 1950-19923
- Carlton J.H. Hayes papers, 1920-19621
- Carnegie Corporation of New York records, circa 1872-201519
- Carnegie Corporation of New York, Series III: Grant Records, 1911-199428
- Carnegie Council on Ethics & International Affairs records, 1844-200823
- Carnegie Endowment for International Peace European Center records, 1910-19541
- Carnegie Endowment for International Peace New York and Washington Offices records, 1910-19546
- Carter Goodrich papers, 1918-19711
- Center for US-China Arts Exchange records, 1956-2019, bulk 1977-20031
- Central Files (Office of the President records), 1890-19844
- Charles Evans Hughes papers, 1914-19301
- Charles Richard Crane Papers, 1869-19671
- Charles S. Ascher papers, 1926-19791
- Charles W. Poletti papers, 1920-1991, bulk 1923-19701
- Chester Alan Arthur papers, 1881-18851
- China Institute in America records, 1926-1976, bulk 1931-19592
- China Study Group on Environmental Issues records, 1961-19941
- Chinese oral history project, 1958-19751
- Columbia University Press records, 1893-2000s, bulk 1923-2000s2