- Le Caine, Hugh, 1914-19774
- Leonard, Bill, 1916-19941
- Levertov, Denise, 1923-19971
- Levy, Marvin David3
- Lewin, David, 1933-20031
- Lidov, David, 1941-2
- List, Eugene, 1918-19851
- Loft, Abram, 1922-20192
- Loriod, Jeanne1
- Loriod, Yvonne1
- Los Angeles Philharmonic Orchestra2
- Luening, Otto, 1900-1996316
- Lybbert, Donald1
- M.I.T. Experimental Electronic Music Studio1
- Maazel, Lorin, 1930-20141
- Macandrew, James1
- Maceda, José1
- Macero, Teo, 1925-20081
- Madeira, Jean1
- Maderna, Bruno1
- Malec, Ivo1
- Marshall, Wendell3
- Massachusetts Institute of Technology1
- Masselos, William2
- Masters, Edgar Lee, 1868-19501
- Matsudaira, Yoritsune, 1907-20011
- Mauzey, Peter, 1930-3
- Mayer, William, 1925-20172
- Mayuzumi, Toshir o, 1929-19971
- Mayuzumi, Toshirō, 1929-19971
- McDowell, John Herbert1
- McKusick, Hal, 1924-20123
- Melchert, Helmut1
- Mennin, Peter1
- Messiaen, Olivier, 1908-19921
- Meyer-Eppler, W. (Werner)2
- Meyerowitz, Jan, 1913-19981
- Mid-America Chorale1
- Milhaud, Darius, 1892-19742
- Mimaro glu, Ilhan K. ( Ilhan Kemaleddin), 1926-20121
- Mimaroğlu, İlhan K. (İlhan Kemaleddin), 1926-20121
- Mimaroğlu, İlhan K. (İlhan Kemaleddin), 1926-20127
- Molnar, Ferenc, 1896-19851
- Monk, Thelonious3
- Monod, Jacques-Louis, 1927-20202
- Montale, Eugenio, 1896-19811
- Moore, Douglas, 1893-19699
- Moore, Ted (Cellist)1
- Moorman, Charlotte1
- Moroi, Makoto, 1930-20132
- Mourant, Walter, 1910-19951
- Murcell, Raymond1
- Murzin, Evgeniĭ Aleksandrovich, 1914-19701
- Nebenzal, Seymour1
- Neuman, Herman1
- New Calliope Singers1
- New York Philharmonic4
- Newlin, Dika, 1923-20061
- Ogihara, Toshitsugu, 1910-19921
- Oldfather, Christopher1