- Kerouac, Jack, 1922-19691
- Kirkpatrick, John, 1905-19911
- Knickerbocker Chamber Players2
- Koch, John, 1928-20141
- Koellreutter, Hans Joachim, 1915-20051
- Kohn, Karl, 1926-1
- Kohon String Quartet4
- Kohon, Harold1
- Komaiko, William2
- Konimsky, Anna1
- Kornacker, Thomas1
- Korte, Karl1
- Kouguell, Alexander2
- Koutzen, George1
- Kraber, Karl1
- Kraft, Jean1
- Krause, Susan (Soprano)1
- Kreiselman, Jack3
- Kroeger, Karl1
- Krosnick, Joel1
- Kuderna, Jerome1
- Kunz, Gerald1
- Kurka, Robert, 1921-19571
- Kushner, Eugene, 1923-20031
- Kuskin, Charles1
- La Barbara, Joan, 1947-1
- La Montaine, John1
- Laderman, Ezra1
- Lamoree, Valarie4
- Lancaster, Lisa1
- Lancman, Deborah1
- Lark Woodwind Quintet1
- Lateiner, Isidor, 1930-20051
- Lavanne, Antonia2
- Lawergren, Bo1
- Lawrence, D. H. (David Herbert), 1885-19301
- Lazarof, Henri1
- Lees, Benjamin, 1924-20101
- Leichtling, Avrohom1
- Lein, David2
- Lenel, Ludwig1
- Lesbines, Tele1
- Lessard, John, 1920-20031
- Levin, Robert D1
- Levine, Julius1
- Levy, Gerardo2
- Lewis, Peter Tod1
- Li, Bai, 701-7621
- Liebling, Joseph1
- Lightner, Helen, 1917-20031
- Ligotti, Albert1
- List, Garrett1
- Listokin, Robert1
- Lockwood, Annea, 1939-1
- Loft, Abram, 1922-20191
- Lombardo, Robert, 1932-1
- Low, Edward1
- Luening, Otto, 1900-19964
- MacInnis, Donald, 1923-20031
- MacNeice, Louis, 1907-19631