- Hayden, Carl Trumbull, 1877-19729
- Hayes, Patrick, 1867-19381
- Henderson, Leon, 1895-19863
- Hennings, Thomas C., Jr. (Thomas Carey), 1903-19605
- Hershey, Lewis Blaine, 1893-19776
- Herzog, Paul and Madeline3
- Hill, Lister and Mrs. Henrietta16
- Hillquit, Morris1
- Hoffman, Anna Rosenberg, 1902-19833
- Hoover, Herbert C.3
- Hopkins, Harry and Mrs. Louise Macy4
- Howe, Darcus2
- Humphrey, Hubert H. and Mrs. Muriel14
- Hunt, Lester C. (Lester Calloway), 1892-19541
- Ickes, Harold and Mrs. Jane D.1
- Impellitteri, Vincent2
- Ingersoll, Raymond V. (Raymond Vail), 1875-19401
- International Ladies' Garment Workers' Union2
- Ives, Irving McNeil, 1896-19628
- Jack, Hulan E. (Hulan Edwin), 1906-19861
- Jackson, Henry M. and Mrs. Helen1
- Jackson, Hugh R. (Hugh Russell), 1912-19662
- Javits, Jacob K. and Mrs.2
- Jessup, Philip C. and Mrs. Lois1
- Johnson, Alvin Saunders, 1874-19714
- Johnson, Edwin C. (Edwin Carl), 1884-19701
- Johnson, Lyndon B. and Lady Bird1
- Johnston, Olin B.13
- Jones, Jesse H. (Jesse Holman), 1874-19562
- Katzin, Alfred G.1
- Keegan, Robert F.1
- Kefauver, Estes and Mrs. Nancy5
- Kellogg, Paul Underwood, 1879-19582
- Kennedy, John F. (John Fitzgerald), 1917-196317
- Kennedy, Robert F.2
- Kennedy, W.P.5
- Kenyon, Dorothy, 1888-19723
- Keogh, Eugene J.5
- Kerr, Robert S. (Robert Samuel), 1896-19635
- Kilgore, Harley Martin, 1893-19563
- King, Martin Luther, Jr., 1929-19681
- Kingdon, Frank, 1894-19721
- Kross, Anna M. (Anna Moscowitz), 1891-19791
- Kuo, Ping Wen, 1880-19692
- La Guardia, Fiorello H. (Fiorello Henry), 1882-19473
- Langer, William, 1886-19591
- Lehman Brothers3
- Lehman Family1
- Lehman, Herbert H.23
- Lehman, Herbert H. (Herbert Henry), 1878-1963992
- Lehman, Herbert H., Mrs.7
- Lehman, Irving and Mrs. Sissie Straus4
- Lehman, Mayer, 1830-18971
- Lehman, Peter G. (Peter Gerald), 1917-19446
- Leidesdorf, Samuel David, 1881-19681
- Levy, Adele Rosenwald, 1892-19602
- Lewisohn, Adolph, 1849-19381
- Lie, Trygve, 1896-19684
- Lipsky, Louis, 1876-19631
- Long, Russell B.5