C
- Colorado Springs Gazette
- Colour Symphony Media
- Colours Multimedia Pvt Ltd
- Com.e Comunicazione and Editora SRL
- ComMedia International (duplicate)
- Commodity Market Magazine
- Common Life Publishing Co., Ltd.
- Commonwealth Magazine Group
- Commonwealth Publishing Co. Ltd
- Communitas Foundation
- Community Newspaper Group
- COMO Hotels
- Compagnie d'edition Andre Paquette
- Compania editora de revistas de Centroamerica
- Compania Periodistica Meridiano
- Compania tipografica Yucateca
- Computaform International
- Concept and Information Group Inc.
- Conde Nast Digital Taiwan Co., Ltd.
- Conde Nast France
- Conde Nast Germany
- Conde Nast Italy
- Conde Nast Mexico
- Conde Nast Spain
- Conde Nast US
- Conley Magazines
- Conley Publishing Group
- Connecor
- Connoisseur Reiseservice GmbH
- Consilde
- Consolidated Publishing
- Consorcio Interamericano de Comunicacion
- Contempo Media
- Content Nation Media Pty Ltd (Conde Nast South Africa)
- Contify
- Continental Media
- Contista Media
- ContraReplica
- Cool English Magazine
- Coopetic Medias
- COPESA S.A
- COQTAIL SRL
- Corporate ID group
- Corporate Traveller
- Correio Braziliense
- Correio da Bahia
- Corriere della Sera Supplements
- Corriere Dello Sport
- Corse Presse
- COSA Media