Collection
- J. Max Bond Jr. papers, 1955-20091
- Jack Harris Samuels English and American literary manuscripts and letters collection, [1630]-19641
- Jacques Barzun papers, 1900-19991
- Jerome Moross papers, 1924-20181
- John A. Garraty papers, 1912-19901
- John Benson Comics interviews, 1965-19741
- John Brown manuscripts, 1839-19431
- John Haffenden Collection of John Berryman Papers, 1952-19781
- John Latouche papers, 1930-19601
- Joseph Barnes papers, 1907-1970, bulk 1923-19701
- Joseph Dorfman papers, 1890-19831
- Joseph Urban papers, 1893-19981
- Juan J. Linz papers, 1936-2010, bulk 1950-19891
- Kagawa Toyohiko papers, 1929-1968, bulk 1936-19541
- Konstantin Feodos'evich Shteppa Papers, 1945-19591
- Language and Culture Archive of Ashkenazic Jewry, 1949-19971
- League of Women Voters of New York State records, 1912-19811
- Lee Lockwood papers, 1965-19671
- Lenore Marshall papers, 1887-19801
- Leonard R. Sayles papers, 1950-19621