| Cinebook | Angleterre | 17 |
| Cinema Novo CRL | France | 1 |
| CinémAction-Corlet | France | 2 |
| Cinéquaprod | | 1 |
| Cinquième saison | France | 1 |
| Cipango | France | 22 |
| Cipher-Naught | Etats-Unis | 15 |
| Circé | France | 42 |
| Circonflexe | France | 354 |
| Circulo latino | France | 7 |
| Citadel Press | France | 8 |
| Citadelles & Mazenod | France | 44 |
| Cité des livres | France | 3 |
| City | France | 1862 |
| City Lights Books | Etats-Unis | 12 |
| City Owl Press | | 14 |
| CityFiles Press | Etats-Unis | 1 |
| CKR | Canada | 19 |
| Claassen | | 2 |
| Clair de Lune | France | 450 |
| Claire Fontaine | France | 1 |
| Claire Lorrain | France | 1 |
| Claire Lumière | France | 26 |
| Claire Paulhan | France | 7 |
| Clancier-Guenaud | France | 30 |
| Clapàs | France | 3 |
| Clarendon Press | Angleterre | 3 |
| Clarion Books | Etats-Unis | 42 |
| Clarisse Kins | | 1 |
| Clarkson Potter | Etats-Unis | 13 |
| Clash Books | Etats-Unis | 2 |
| Class Ebook | Etats-Unis | 2 |
| Classic collection Carolina | Etats-Unis | 2 |
| Classical Comics | France | 4 |
| Classiques universels | France | 19 |
| Claude Drouin | | 2 |
| Claude Lefranc | | 18 |
| Clavis | | 8 |
| CLC | France | 12 |
| CLD | France | 4 |
| Clé | France | 3 |
| Cleis Press | Etats-Unis | 2 |
| Cleopas | France | 5 |
| Clerkenwell press | Etats-Unis | 1 |
| Clermont | Canada | 5 |
| Cleverton Books | France | 1 |
| Climats | France | 47 |
| Climbing Rosebud | France | 1 |
| Clinamen | | 1 |
| Clique | France | 2 |
| Clochette | France | 20 |
| Clockpunk Press | | 1 |
| CloniTech | | 1 |
| Clover Press | Etats-Unis | 1 |
| Clovis | France | 1 |
| Club Bibliophile de France | France | 7 |
| Club des amis du livre | France | 12 |
| Club des amis du livre progressiste | France | 3 |
| Club des Libraires de France | France | 10 |
| Club du Livre - Philippe Lebaud | France | 5 |
| Club du livre sélectionné | France | 4 |
| Club Express | France | 7 |
| Club Français du Livre | France | 9 |
| Club International du Livre | France | 2 |
| Club Stephen King | | 2 |
| Clube do Autor | Portugal | 3 |
| Clumba | | 1 |
| CMC Publising | | 2 |
| CN | Afghanistan | 12 |
| CNRS | France | 228 |
| CNT-RP | France | 2 |
| Coach House Books | Canada | 7 |
| Cobblestone Press | Etats-Unis | 2 |
| Cobra | | 12 |
| Coccinelle | Belgique | 3 |
| Coco B | France | 1 |
| Coconino Press | France | 6 |
| Cocorico | France | 5 |
| Coda | France | 17 |
| Code9 | France | 2 |
| Codes Rousseau | France | 2 |
| Codhill | | 1 |
| Codice | Italie | 1 |
| Coëtquen | France | 16 |
| Coeur de lune | France | 4 |
| Coffee house press | Etats-Unis | 12 |
| Cogitare | France | 5 |
| Cogito | France | 8 |
| Cogito Ergo Sum | France | 15 |
| Cohen&Cohen | France | 11 |
| Coiffard librairie | France | 2 |
| Colbo | France | 2 |
| Colibri | Bulgarie | 1 |
| Colihue | France | 1 |
| Collection livres | France | 11 |
| Collection Poche | France | 9 |
| Collection Pourpre | France | 21 |
| Collection Proche | France | 39 |
| Collection XIX | France | 5 |
| Collector's Guide Publishing | France | 2 |
