- Kauffmann, Henrik, 1888-19631
- Kefauver, Estes and Mrs. Nancy1
- Kellogg, Paul Underwood, 1879-19585
- Kennedy, John F. (John Fitzgerald), 1917-19633
- Kennedy, Michael J. (Michael Joseph), 1897-19492
- Kennedy, Robert F.1
- Keogh, Eugene J.1
- Keon1
- Kilgore, Harley Martin, 1893-19561
- Kirby, Rollin1
- Kirchwey, Freda2
- Kirk, Grayson L. (Grayson Louis), 1903-19973
- Knopf, Alfred A., 1892-19841
- Kollek, Teddy, 1911-20071
- Kuchel, Thomas H.1
- Kuman, Paul1
- Kung, Harold H.1
- La Brie, Henry G1
- Lake Placid Club1
- Langer, William, 1886-19593
- Lasky, Victor1
- LeBreton, Louis, 1818-18661
- Lehman Brothers1
- Lehman Family5
- Lehman, Arthur and Mrs. Adele2
- Lehman, Emanuel, 1827-19071
- Lehman, Herbert H.45
- Lehman, Herbert H. (Herbert Henry), 1878-1963844
- Lehman, Herbert H., Mrs.19
- Lehman, Hilda Jane2
- Lehman, Irving and Mrs. Sissie Straus8
- Lehman, Mayer, 1830-18973
- Lehman, Orin, 1920-20081
- Lehman, Peter G. (Peter Gerald), 1917-19449
- Limburg, Richard1
- Lindquist, G. E. E. (Gustavus Elmer Emanuel), 1886-196736
- Lippman, Walter and Mrs. Helen1
- Lipsky, Louis, 1876-19631
- Lissim, Simon, 1900-19811
- Lodge, Henry Cabot, Jr., 1902-19852
- Loeb, Frances Lehman, 1906-19961
- Long, Russell B.3
- Lorrain, Claude, 1600-16821
- Low, Robert A. and Mrs. Frances2
- Luckman, Charles, 1909-19991
- MacDuffie, Marshall, 1909-19672
- Macfadden, Bernarr, 1868-19552
- Magnes, J. L. (Judah Leon), 1877-19482
- Magnus, Charles1
- Magnuson, Warren G. (Warren Grant), 1905-19896
- Maguire, Edward C.2
- Mahoney, Jeremiah Titus, 1878-19701
- Mail & Express (Firm)1
- Manning, William T.2
- Marshall, Thurgood, 1908-19931
- Martin, Edward, 1879-19673
- Marvin, Dwight, 1880-19722
- Massachusetts. Governor1
- Master, Arthur M. (Arthur Morris), 1895-19732
- May, Mitchell3