| Name | Nationality | Period | Tunes |
|---|
| La Monnoye, Bernard de |  | 1641–1728 | 1 |
| LaCalle, Joseph |  | 1860–1937 | 1 |
| Lachau, Ada de |  | ? | 1 |
| Larionov, Ivan |  | 1830–1889 | 1 |
| Lassus, Orlande de |  | 1532–1594 | 1 |
| Lavallée, Calixa |  | 1842–1891 | 1 |
| Lawrie, William |  | 1881–1916 | 2 |
| Leclair, Jean-Marie | | 1697–1764 | 9 |
| Lee, Alexander | | 1802–1851 | 3 |
| Leeves, William | | 1748–1828 | 1 |
| Lehár, Franz |  | 1870–1948 | 2 |
| Lehman, Frederick Martin | | 1868–1953 | 1 |
| Leoncavallo, Ruggero |  | 1857–1919 | 1 |
| Leontovych, Mykola |  | 1877–1921 | 1 |
| Liguori, Alfonso Maria de' | | 1696–1787 | 1 |
| Liliʻuokalani | | 1838–1917 | 1 |
| Lindeman, Ludvig Mathias |  | 1812–1887 | 1 |
| Liszt, Franz | | 1811–1886 | 1 |
| Lob, Otto |  | 1837–1908 | 1 |
| Locatelli, Pietro Antonio | | 1695–1764 | 43 |
| Lodge, Henry | | 1884–1933 | 1 |
| Loeillet, Jean-Baptiste de Gant | | 1688–1720 | 40 |
| Lombardo, Ricky | | 1946— | 3 |
| Lover, Samuel |  | 1797–1868 | 1 |
| Lowry, Robert | | 1826–1899 | 1 |
| Lully, Jean-Baptiste | | 1632–1687 | 1 |
| Lusse, Charles de | | 1720–1774 | 12 |
| Luther, Martin | | 1483–1546 | 2 |
| Lvov, Alexei | | 1799–1870 | 1 |