| Courtin, Bruno | Bruno Courtin | Composer | 1994 | 1 | |
| Condon, Fernando | Fernando Condon | Composer | 1994 - 2001 | 3 | |
| Chydenius, Kaj | Kaj Chydenius | Composer | 1980 | 1 | |
| Conely, James | James Conely | Composer | 1997 | 1 | |
| Coburger, Christoph | Christoph Coburger | Composer | 1995 - 2018 | 5 | |
| Crişan Rusu, Dorina | Dorina Crişan Rusu | Composer | 1997 - 1998 | 2 | |
| Corapi, Giordano | Giordano Corapi | Composer | 2013 - 2014 | 4 | |
| Coombes, Douglas | Douglas Coombes | Composer | 1967 | 1 | |
| Carrapatoso, Eurico | Eurico Carrapatoso | Composer | 2002 | 1 | |
| Cavalieri, Pietro | Pietro Cavalieri | Composer | 2002 | 1 | |
| Csemiczky, Miklós | Miklós Csemiczky | Composer | 2002 | 1 | 1 |
| Christensson, Christer | Christer Christensson | Composer | 2003 | 4 | |
| Christofides, Constantin | Constantin Christofides | Composer | 2003 | 2 | |
| Cybinski, Patrick | Patrick Cybinski | Composer | 2004 | 1 | |
| Claris de Florian, Jean-Pierre | Jean-Pierre Claris de Florian | Composer | 2004 | 1 | |
| Cón, Karel | Karel Cón | Composer | 2000 | 1 | |
| Cristei, Cornel | Cornel Cristei | Composer | 2010 | 2 | |
| Cullen, Ian | Ian Cullen | Composer | 2005 | 1 | |
| Covalescu, Anatol | Anatol Covalescu | Composer | 1963 | 1 | |
| Cári, Tibor | Tibor Cári | Composer | 2012 - 2013 | 5 | |
| Chalosse, Marc | Marc Chalosse | Composer | 2007 | 9 | |
| Cossa, Mariano | Mariano Cossa | Composer | 2006 | 2 | |
| Conde, Antonio Díaz | Antonio Díaz Conde | Composer | 1954 - 1956 | 2 | |
| Crockett, Zachary | Zachary Crockett | Composer | 2006 | 1 | |
| Crewdson, Will | Will Crewdson | Composer | 2008 | 2 | |
| Clohessy, Denis | Denis Clohessy | Composer | 2008 | 1 | |
| Carlsson, Li | Li Carlsson | Composer | 2009 | 1 | |
| Conzelmann, Wolf | Wolf Conzelmann | Composer | 1963 - 1964 | 2 | |
| Claußner, Steffan | Steffan Claußner | Composer | 2013 | 1 | |
| Chadabe, Joel | Joel Chadabe | Composer | 1957 | 1 | |
| Cooke, Arnold | Arnold Cooke | Composer | 1932 | 1 | |
| Cagnolari, Christophe | Christophe Cagnolari | Composer | 1999 | 10 | |
| Chèze, Bernard | Bernard Chèze | Composer | 1999 | 10 | |
| Capiba, - | - Capiba | Composer | 1949 | 1 | |
| Chamberland, Yves | Yves Chamberland | Composer | 2016 | 1 | |
| Cicchelli, Rodrigo | Rodrigo Cicchelli | Composer | 1991 | 1 | |
| Coax, - | - Coax | Composer | 1993 | 1 | |
| Christodoulides, Michalis | Michalis Christodoulides | Composer | 2017 | 2 | |
| Coyne, Sean | Sean Coyne | Composer | 2018 | 1 | |
| Christodoulopoulos, Giannis | Giannis Christodoulopoulos | Composer | 2017 | 1 | |
| Coulter, David | David Coulter | Composer | 2022 | 1 | |
| Cansiano, Alexis | Alexis Cansiano | Composer | 2005 - 2014 | 5 | |
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