- John Ciardi -- John Clare
- John Clark -- John Clayton
- John Cleary & Michael Leicht -- John Clinebell
- John Close -- John Cody
- John Cody -- John Coleman
- John Coleman & His Orchestra -- John Coltrane
- JOHN COLTRANE/M RADONOVICS -- John Columbus
- John Colville -- John Conklin
- John Conley -- John Connor
- John Connor/Drowned -- John Constable
- John Constable [Organ] -- John Cooper
- John Cooper -- John Copper
- John Coppin -- John Corbin