- C. Leonard Raybon
- Cabrillo College's Il Dolce Suono
- Caitriona O'Leary
- California State University Fullerton Singers
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- Calliope
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- Cantillation
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- CANTUS
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- Capital University Chapel Choir
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- Cappella Musicale Della Cattedrale di Vercelli
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- Cardiff Metropolitan Cathedral Choir
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- Carmel H.S.The Accents
- Carolinae Female Choir
- Carrithers Middle School 7th & 8th Grade Chorus
- Caryn Hartglass
- Cascade High School Vivace
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- Caspar Children’s Chorale
- Cathedral Choir of The Cathedral of St. Philip
- Cavendish Music
- Cedar Park High School Varsity Mixed Choir
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- Center Grove Middle School Concert Choir
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- Central Washington University Chamber Choir
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- Chamber Choir of the Moscow Conservatory
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- Chancel Choir of Church of the Incarnation, Dallas
- Chancel Choir of Shadyside Presbyterian Church Pittsburgh
- Chandler Children’s Choir
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- Chapel Choir of the Royal Hospital Chelsea
- Chappelle Musicale de la Trinite' des monts, Mura
- Charles Bruffy
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- Charles M. Russell H.S. Chanteur Choir
- Charles M. Russell High School Chanteur Choir
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- Charlestown High School Scaliwags
- Charlotte Church
- Charter Choir of Homerton College, Cambridge
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- Choir of St Mary’s Cathedral, Edinburgh
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- Choir of the Church of the Redeemer
- Choir of The King's Consort
- Choir of The Queen's College Oxford
- Choir of The Vienna Hofburgkapelle
- Choir of Trinity College Cambridge
- Choir of Trinity College, Cambridge *<performer>
- Choir of Trinity College, University of Melbourne
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- Choir School of Delaware
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- Choirs of the Choral Academy Project - Singing Poland
- Chor der Bamberger Symphoniker
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- Chor der J.S. Bach-Stiftung
- Chor der Kölner Akademie
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- Chor des Bayerischen Rundfunks
- Chor Leoni Men's Choir
- Chor und Orchester von St. Augustin
- Choral Arts
- Choral Arts Society of Washington
- Chorale des Professeurs d'éducation musicale du département de la Seine
- Chorale des écoles de Petit-Quevilly
- Chorale Janequin
- Chorale Jean-Paul-Kreder
- Chorales d'Enfants / Chants de Joie
- Chorgemeinschaft Apetlon Weiden/See
- Chorosynthesis Singers
- Chorus Angelicus & Gaudeamus
- Chorus Viennensis
- Chris Thurman
- Christ Church Cathedral Choir
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- Christ Church Schola Cantorum
- Christa Ludwig
- Christchurch Boys' Choir 2014
- Christian Bollmann
- Christian Immler
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- Christmas Children's Chorus
- Christoph Hammer
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- Christoph Spering
- Christophe Coin
- Christopher Berry
- Christopher Dearnley
- Christopher Hogwood
- Christopher Jackson
- Christopher Robinson
- Christopher Tin
- Christopher Willcock