Registry
- Hugo Kahn (None - 1932)
- Robert Kahn (1865 - 1951)
- Johann Nepomuk Kalcher (1764 - 1827)
- Friedrich Kalkbrenner (1785 - 1849)
- Christian Kalkbrenner (1755 - 1806)
- Anna Kantor (1923 - 2021)
- William Kapell (1922 - 1953)
- Josef Karbulka (1866 - 1920)
- Elena Kats-Chernin (1957 - None)
- Georg Friedrich Kauffmann (1679 - 1735)
- Wilhelm Kempff (1895 - 1991)
- Johann Caspar Kerll (1627 - 1693)
- Aloys Kettenus (1823 - 1896)
- Alisa Kezheradze (1937 - 1996)
- Aram Khachaturian (1903 - 1978)
- Friedrich Kiel (1821 - 1885)
- Johann Erasmus Kindermann (1616 - 1655)
- Johann Kirnberger (1721 - 1783)
- Evgeny Kissin (1971 - None)
- Johann Christian Kittel (1732 - 1809)
- Johann Friedrich Kittl (1806 - 1868)
- Bernhard Klein (1793 - 1832)
- Heinrich Klein (1756 - 1832)
- Valery Klimov (1931 - 2022)
- Karl Klindworth (1830 - 1916)
- Friedrich Gottlieb Klingenberg (1660 - 1720)
- Martin Klingenberg (None - None)
- Iwan Knorr (1853 - 1916)
- Apollinaire de Kontski (1824 - 1879)
- Hermann Kotzschmar (1829 - 1908)
- Kozcek (None - None)
- Semyon Kozolupov (1884 - 1961)
- Leopold Koželuch (1747 - 1818)
- Jan Antonín Koželuh (1738 - 1814)
- Antonín Kraft (1749 - 1820)
- Martin Krause (1853 - 1918)
- Fritz Kreisler (1875 - 1962)
- Franz Krenn (1816 - 1897)
- Rodolphe Kreutzer (1766 - 1831)
- Johann Philipp Krieger (1649 - 1725)
- Johann Jacob Kriegk (1750 - 1814)
- Wilhelm Krüger (1820 - 1883)
- Gottlieb Krüger (1824 - 1895)
- Johann Kuhnau (1660 - 1722)
- Sigiswald Kuijken (1944 - None)
- Barthold Kuijken (1949 - None)
- Wieland Kuijken (1938 - None)
- Theodor Kullak (1818 - 1882)
- Friedrich August Kummer (1797 - 1879)
- Vilém Kurz (1872 - 1945)
- James Kwast (1852 - 1927)
- Ernst Köhler (1799 - 1847)