- Merjos, Constantine1
- Merton, Thomas, 1915-19681
- Messiaen, Olivier, 1908-19922
- Metropolitan Opera (New York, N.Y.)1
- Metropolitan Opera (New York, N.Y.). Chorus1
- Metropolitan Opera (New York, N.Y.). Orchestra1
- Middleton, Jean (Pianist)4
- Middleton, Robert, 1920-20161
- Midtmoen, Forrest1
- Miki, Lily2
- Milhaud, Darius, 1892-19742
- Millay, Edna St. Vincent, 1892-19502
- Miller, Allen (Violinist)1
- Miller, Barbara (Soprano)1
- Miller, David Alan, 1962-1
- Miller, Frederick (Cellist)1
- Miller, Jean1
- Miller, Jesse (Double bassist)1
- Miller, Laurel (Mezzo-soprano)2
- Miller, Robert, 1930-198117
- Mills, Charles, 1914-19821
- Mills, Fred, 1935-20092
- Mills, Gene (Pianist)1
- Mimaroğ̆lu, İlhan K (İlhan Kemaleddin), 1926-201289
- Mimaroğlu, İlhan K. (İlhan Kemaleddin), 1926-2012152
- Mingus, Charles, 1922-19792
- Minty, Dorothy1
- Miranda Vargas, Sara1
- Miranda, Tony1
- Mitchell, Arthur, 1934-201813
- Mitchell, Joni1
- Mizelle, Dary John, 1940-1
- Mi͡askovskiĭ, N. (Nikolaĭ), 1881-19501
- Mobbs, Edward1
- Moll, Mariquita, 1923-20002
- Mompou, Federico, 1893-19871
- Monaco, Alfredo del, 1938-1
- Monello, Spartaco V. (Spartaco Vindice), 1909-20091
- Monod, Jacques1
- Monod, Jacques-Louis, 1927-20201
- Monosoff, Sonya1
- Monroe, Marilyn, 1926-19621
- Monson, Dale1
- Monte, Philippe de, 1521-16032
- Montecino, Alfonso, 1924-20151
- Monteux, Claude1
- Monteux, Marianne1
- Montlack, Sol1
- Moody Blues (Musical group)3
- Moore, Carman3
- Moore, David, 1938-2
- Moore, Douglas, 1893-196923
- Moore, Kermit1
- Moore, Scotty1
- Moore, Thomas, 1933-1
- Moorman, Charlotte1
- Mordis, Gerald1
- Morel Campos, Juan, 1857-18961
- Morel Campos, Juan, 1857-1896. Sinfonia Puerto Rico1
- Moreno, Madja1