- Gordon Bunshaft architectural drawings and papers4
- Granary Books Records1
- Gregory Corso Papers3
- Group Research, Inc. Records122
- H. Lawrence Freeman Papers4
- Hart Crane Papers1
- Hart Crane project3
- Hematology project16
- Hemophilia oral history collection59
- Henry Hope Reed Papers6
- Henry Knox Sherrill project40
- Herbert H. Lehman Papers484
- Herbert H. Lehman project9
- Hettie Jones Papers51
- History of Medicare oral history collection2
- Holdouts! Reference Files1
- Hollywood film industry project35
- Hudson Guild records, 1896-1990s1
- Hungarian project46
- Independence National Historical Park project15
- Individual interviews oral history collection693
- Institute of Inter-American Affairs project18
- Intercollegiate Athletics and Physical Education Records2
- International Institute of Rural Reconstruction Records156
- International negotiations project1
- Iranian-American relations project23
- Ivan I. Morris Papers2
- J. Max Bond Jr. Papers10
- Jack Agüeros Papers, 1914-20129
- Jack Beeson papers, 1933-20101
- Jack and Irene Delano papers192
- Jackson Hole Preserve project13
- Jacques Barzun Papers39
- James Hal Cone papers197
- James Lawrence Fly project22
- James S. Russell Papers2
- Jane C. Loeffler Collection of Research Papers on American Embassies2
- Japanese American Citizens League oral history collection10
- Japanese women project2
- Jessie Smith Noyes Foundation Oral History Collection15
- Joan McClure Papers11
- John B. Oakes oral history collection1
- John Eugene Unterecker Papers3
- John F. Kennedy project2
- Journalism lectures2
- Journalism lectures (A) project7
- Journalism lectures (C) project2
- Judith Crist Papers1
- Judson Gooding papers1
- Jurij Lawrynenko papers213
- Kagawa Toyohiko Papers38
- Kirkland College project3
- Lamont-Doherty Earth Observatory oral history collection50
- Language and Culture Archive of Ashkenazic Jewry629
- Laura Keane Zametkin Hobson Papers4
- Lawyers Who Went South oral history collection27
- League of Women Voters of New York State records1
- Lee Lockwood Papers5
- Leftist Women in the Spanish Civil War oral history collection20
- Lenox Hill Hospital oral history collection28