Registry
- Gian Carlo Cailò (1659 - 1722)
- Antonio Caldara (c.1670 - 1736)
- Francesco Antonio Calegari (1656 - 1742)
- Sethus Calvisius (1556 - 1615)
- Faustino Camisani (1772 - 1830)
- Michele Campanella (1947 - None)
- Martin Canin (1930 - 2019)
- Christian Cannabich (1731 - 1798)
- Lucien Capet (1873 - 1928)
- Giacomo Carissimi (1605 - 1674)
- Pablo Casals (1876 - 1973)
- Giovanni Maria Casini (1652 - 1719)
- Charles-Simon Catel (1773 - 1830)
- Georges Caussade (1873 - 1936)
- Francesco Cavalli (1602 - 1676)
- Raymond Cerf (1901 - 1978)
- Beniamino Cesi (1845 - 1907)
- Antonio Cesti (1623 - 1669)
- Camillo Cevenini (1607 - 1676)
- Stuart Challender (1947 - 1991)
- Jacques Champion de Chambonnières (c.1601 - 1672)
- Marc-Antoine Charpentier (1643 - 1704)
- Shura Cherkassky (1909 - 1995)
- Luigi Cherubini (1760 - 1842)
- Bartolomeo Cherubini (None - None)
- Jan Chiapusso (1890 - 1969)
- Dimitry Chin (None - None)
- Frédéric Chopin (1810 - 1849)
- Aldo Ciccolini (1925 - 2015)
- Tamara-Anna Cislowska (None - None)
- Jeremiah Clarke (c. 1674 - 1707)
- Hugh Archibald Clarke (1839 - 1927)
- James Paton Clarke (1808 - 1877)
- Muzio Clementi (1752 - 1832)
- Van Cliburn (1934 - 2013)
- Frederic Cliffe (1857 - 1931)
- Theodor Coccius (1824 - 1897)
- Orlando Cole (1908 - 2010)
- Giovanni Paolo Colonna (1637 - 1695)
- Loyset Compère (c.1445 - 1518)
- Benjamin Cooke (1734 - 1793)
- George Cooper (1820 - 1876)
- George Cooper Sr. (c.1783 - 1843)
- Ettore Cordone (1888 - 1975)
- Arcangelo Corelli (1653 - 1713)
- Peter Cornelius (1824 - 1874)
- Alfred Cortot (1877 - 1962)
- Bernhard Cossmann (1822 - 1910)
- François Couperin (1668 - 1733)
- Louis Couperin (c.1626 - 1661)
- Henry Cowell (1897 - 1965)
- Johann Baptist Cramer (1771 - 1858)
- Wilhelm Cramer (1746 - 1799)
- William Croft (1678 - 1727)
- William Crotch (1775 - 1847)
- Maria Curcio (1918 - 2009)
- Carl Czerny (1791 - 1857)
- Gyorgy Cziffra (1921 - 1994)