- Kagan, Gerald1
- Kagen, Sergius1
- Kahn, Erich Itor, 1905-19561
- Kahn, Sonja1
- Kahn, Sue Ann1
- Kahn, Susan (Flute player)1
- Kalajian, Berge, 1924-20021
- Kalisch, Joan4
- Kalisch, Shoshana1
- Kalish, Gilbert8
- Kantarjian, Gerard, 1931-20211
- Kaplan, Elliot1
- Kaplan, Herbert1
- Kaplan, Lewis14
- Kaplan, Melvin2
- Karas, Sperie1
- Karlins, M. William1
- Karman, Lotte3
- Kass, Jon1
- Katz, George1
- Katz, Mary1
- Kaye, Milton1
- Kazantzakis, Nikos, 1883-19571
- Keil, Sidney1
- Kella, John Jake1
- Kelly, Robert, 1916-20071
- Kent, Edward1
- Kerouac, Jack, 1922-19691
- Kessner, Daniel, 1946-1
- Kessner, Dolly, 1946-1
- Kibler, Belva, 1913-19831
- Killmer, Richard1
- Kirchner, Leon1
- Kirkbride, Jerry2
- Kirkpatrick, John, 1905-19913
- Klein, Charles, 1867-19152
- Klein, Fred E4
- Kneeream, Ralph1
- Knickerbocker Chamber Players2
- Knight, Felix1
- Knight, Morris, 1933-20131
- Koch, John, 1928-20141
- Koellreutter, Hans Joachim, 1915-20051
- Kohn, Karl, 1926-1
- Kohon String Quartet5
- Kohon, Harold2
- Komaiko, William4
- Konimsky, Anna1
- Kopulos, Maria1
- Korn, Barbara1
- Korn, Peter Jona1
- Kornacker, Thomas1
- Korte, Karl1
- Kouguell, Alexander6
- Koussevitzky, Serge, 1874-19511
- Koutzen, George3
- Kozusko, Colette1
- Kraber, Karl5
- Kraft, Jean1
- Kraft, Leo3