- Lewis, Emmanuel (Judge)4
- Lewis, Hylan1
- Lewisohn, Sam A. (Sam Adolph), 1884-1
- Library of Congress2
- Lifetime Television (Firm)1
- Lindsay, Samuel McCune, 1869-19601
- Linton, Ralph, 1893-19533
- Lloyd, R. McAllister, 1898-19851
- Lloyd, Trevor Owen1
- Locke, Alain, 1885-19546
- Loemker, Dorothy Rowden1
- Lorimer, Frank, 1894-19858
- Lovejoy, Gordon Williams, 1912-8
- Lucas, Adetokunbo O1
- Luce, Henry Robinson, 1898-19671
- Luhanga, Matthew Laban, 1948-1
- Lumiere Productions1
- Lundberg, George Andrew, 1895-19661
- Lynd, Robert Staughton, 1892-19705
- MCW Global1
- Mac and Ava Motion Pictures2
- MacNeil/Lehrer Productions4
- Magat, Dick1
- Magat, Richard4
- Mahoney, Margaret E1
- Mahoney, Margaret, 1924-1
- Mai, Vincent A1
- Mail Pub. Co. (Hagerstown, Md.)1
- Malherbe, E. G. (Ernst Gideon), 1895-1
- Maloney, Jason1
- Malzberg, Benjamin, 1893-197519
- Mandel, Ruth B1
- Mandelbaum, Michael1
- Mangum, Charles S., Jr. (Charles Staples), 1902-19804
- Mannion, Geraldine P., 1955-2
- Manship, Paul1
- Marks, Eli S. (Eli Samplin), 1911-1
- Marshall, F. Ray1
- Marvel, William Worthington, 1920-19781
- Massachusetts Institute of Technology1
- Mather, Kirtley F. (Kirtley Fletcher), 1888-19782
- Matuszewski, Daniel C1
- Matuszewski, Daniel C.1
- May, Stacy2
- Maybury-Lewis, David1
- Mazzotta, Meredith1
- McClain, Elmer2
- McCollum, Mattie Faye1
- McConnell, T. R. (Thomas Raymond), 1901-19891
- McCormick, Samuel Black, 1858-19281
- McCormick, Thomas Carson11
- McCue, Constance2
- McCuistion, Fred, 1892-19692
- McDonald, Laughlin1
- McFeely, Richard H.1
- McGill, Ralph, 1898-19691
- McGrath, Earl J., 1902-19931
- McKinney, George Wesley3
- McPherson, William H. (William Heston), 1902-2
- Mead, Margaret, 1901-19781