- Fritz Reiner Papers8
- Gail Mary Killian and Stephen Desroches sound recordings21
- George A. Plimpton Papers19
- George Arthur Plimpton Library53
- George Economou Papers5
- George Washington Papers1
- Goddard-Riverside Community Center records2
- Gouverneur Morris papers, 1768-18161
- Granary Books Records1
- Graphic Arts1
- Gregory Corso Papers3
- Group Research, Inc. Records178
- H. Lawrence Freeman Papers2
- Hamilton Family Papers1
- Harper & Brothers Records1
- Harrison E. Salisbury Papers1
- Hart Crane Papers2
- Herbert H. Lehman Papers446
- Herbert Lionel Matthews Papers1
- Hettie Jones Papers51
- Historical Collection of Children's Literature19
- Historical Map Collection1
- House of Books Ltd. Records1
- Hubert H. Harrison Papers266
- Hudson Guild records, 1896-1990s1
- Hunt-Berol Sheet Music Collection3
- Incunabula1
- International Institute of Rural Reconstruction Records125
- Ivan I. Morris Papers3
- Jack Agüeros Papers, 1914-20129
- Jack Harris Samuels Library3
- Jack and Irene Delano papers30
- Jacques Barzun Papers32
- James Kent Library1
- Jane Howard Papers1
- Joan Konner Papers122
- John Eugene Unterecker Papers3
- John Howard Griffin Papers1
- John Jay papers1
- Joseph Pulitzer papers29
- Joseph Urban Papers786
- Judith Crist Papers1
- Judson Gooding papers1
- Jurij Lawrynenko papers1
- Kilroe Collection of Tammaniana1
- L.S. Alexander Gumby collection of Negroiana183
- Language and Culture Archive of Ashkenazic Jewry2
- Laura Keane Zametkin Hobson Papers4
- League of Women Voters of New York State records1
- Lee Lockwood Papers1
- Leo H. Downes Papers10
- Lev Loseff Papers14
- Lillian D. Wald Papers1
- Lincoln Steffens Papers1
- Lionel Trilling Seminars Records55
- Lou Little Papers2
- Louis Ginsberg Papers35
- Louis Morris Starr papers1
- Lucien Carr Papers1
- Lydiard Heneage Horton Papers2