| Jacques, Reginald (1894-1969) |
| James, John |
| James, Kevin |
| Janáček, Leoš (1854-1928) |
| Jarre, Maurice (1924-2009) |
| Järvlepp, Jan (1953- ) |
| Jenkins, Gordon (1910-1984) |
| Jenkins, Karl (1944- ) |
| Joachim, Josef (1831-1907) |
| Jóhannsson, Jóhann (1969-2018) |
| Johnson, Craig Hella (1962- ) |
| Jolivet, André (1905-1974) |
| Jones, Isham/Gus Kahn |
| Jones, Quincy (1933-2024) |
| Jones, Trevor (1949- ) |
| Jongen, Joseph (1873-1953) |
| Joplin, Scott (1867-1917) |
| Joseph, Julian (1966- ) |
| Joubert, John (1927-2019) |
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