- Kirkpatrick, John, 1905-19912
- Klein, Fred E2
- Knight, Morris, 1933-20131
- Kohon String Quartet1
- Kohon, Harold1
- Komaiko, William1
- Kopulos, Maria1
- Kouguell, Alexander4
- Koutzen, George1
- Kozusko, Colette1
- Kraber, Karl2
- Kraft, Leo1
- Kriesberg, Matthias1
- LaPorta, John1
- Laderman, Ezra1
- Layton, Billy Jim, 1924-20041
- Leifur Thórarinsson, 1934-19981
- Lentz, Daniel, 1942-1
- Lerew, Donna1
- Levenson, Emanuel1
- Levenson, Michael3
- Levey, Lauren1
- Levi, Nannette, 1926-20071
- Levin, Monroe, 1923-1
- Levine, Gilbert, 1948-1
- Levine, Jeffrey1
- Levine, Jesse, 1940-20081
- Levine, Julius1
- Levitan, Sam, 1913-20031
- Levy, Edward, 1929-20021
- Levy, Frank, 1930-20171
- Levy, Gerardo1
- Lewis, Robert Hall, 1926-19961
- Ley, Salvador, 1907-19851
- Libove, Charles, 1926-1
- Lichter, Bonnie1
- Lieberman, Barbara1
- List, Garrett1
- Lucarelli, Bert1
- Luening, Otto, 1900-19965
- Macchia, Salvatore1
- Marx, Josef, 1913-19782
- Marx, Joseph, 1882-19641
- Maslanka, David, 1943-20171
- Maxfield, Richard, 1927-19691
- McCracken, Charles1
- McDowell, John Herbert1
- McGee, Gary (Clarinetist)1
- McGraw, Cameron1
- McKnight, Charles, 1949-1
- Menken, Julian1
- Mensch, Homer R1
- Merjos, Constantine1
- Middleton, Jean (Pianist)1
- Miki, Lily1
- Miller, Frederick (Cellist)1
- Miller, Jesse (Double bassist)1
- Miller, Robert, 1930-19816
- Mills, Fred, 1935-20092
- Miranda Vargas, Sara1