Collection
- Brander Matthews Dramatic Museum records, 1910-19711
- Bruce family papers, 1808-18941
- Burr Robbins Circus collection, 1864-19081
- C. Elizabeth McNeil Scrapbook, 1935-19401
- C. H. Detwiller Columbia 1885 collection, 1874-1940, bulk 1881-18851
- Calvin Sutliff Hathaway papers, 1941-19541
- Carl Remington papers, 1899-19051
- Carnegie Corporation of New York records, circa 1872-20151
- Carnegie Council on Ethics & International Affairs records, 1844-20081
- Carol Elaine Greenholz Scrapbook, 1951-19521
- Caroline King Duer Papers, 1905-19521
- Cecile Rose Lehman (Seligman) Papers, 1905-2005, bulk 1905-19571
- Charles Augustus Briggs Papers, 1841-19131
- Charles F. Chandler papers, 1847-1937, bulk 1864-19251
- Charles Yale Harrison papers, 1920-19541
- Charlotte Gabor DuBois Scrapbook, 1941-19481
- Chester Alan Arthur papers, 1881-18851
- Chi Alpha, 1816-19671
- Chicanx Caucus Records, 2001-20141
- Citizens Union of the City of New York records, 1892-20201