| Leonard-Solis, Peter (1) | LePage, Gordon (2) | Lepez, Josefina (1) |
| Lerner, Alan Jay (4) | Leroux, Gaston (3) | Leslie, Diane (4) |
| Lessing, G.E. (1) | Letts, Tracy (3) | Levin, Ira (3) |
| Levin, Victor (1) | Levis, Tajlei (1) | Levy, Aaron (1) |
| Levy, Jan (1) | Lewine, Richard (1) | Lewis, EM (2) |
| Lewis, Karen L. (1) | Lewis, C.S. (8) | Lewis, Jonathan (1) |
| Lewis Thomas, Annemarie (1) | Lewman, David (1) | Lewton, Randall (1) |
| Liberatore, William (1) | Lieberman, Susan (1) | Limber, Chris (1) |
| Lindberg, Trish (1) | Lindblad, Sharon (1) | Linden, Sonja (2) |
| Linder, Evan (1) | Linderman, Ed (1) | Lindle, Darian (1) |
| Lindsay, Joan (1) | Lindsay, Howard (6) | Lindsay-Abaire, David (1) |
| Lindsey-Nassif, Robert (1) | Linehan, Graham (1) | Link, William (3) |
| Linney, Romulus (1) | Lion, Margaret (1) | Lipez, Erica (1) |
| Lippa, Louis (4) | Lippa, Andrew (7) | Lippman, Anna (1) |
| List, Bo (1) | Lithwick, Dahlia (1) | Little, Mindy Manley (1) |