- L'Enfant, Pierre
- La Follette, Robert
- Lahr, Bert
- Landis, Kenesaw Mountain
- Landry, Tom
- Lane, Dick "Night Train"
- Langdon, John
- Lazarus, Emma
- Lewis, Francis
- Lincoln, Abraham
- Lincoln, Mary Todd
- Lincoln, Robert Todd
- Lindsey, George
- Livingston, Brockholst
- Livingston, Philip
- Livingston, William
- Lodge, Henry Cabot, Jr.
- Lodge, Henry Cabot, Sr.
- Longfellow, Henry Wadsworth
- Longworth, Alice Roosevelt
- Louis, Joe
- Lovecraft, H. P.
- Lucania, Salvatore "Lucky Luciano"
