| Claude Ste Marie Sports | All-Terrain Vehicles | stemariesport.com |
| Climatisation CBR | Air Conditioning Contractors | — |
| Climatisation Consommat-Air | Air Purifiers | consommatair.com |
| Clinique 3601 | Tout Entreprises et services | clinique3601.com |
| Clinique Chiro-Santé Rive-Sud | Chiropractors | chirosanterivesud.com |
| Clinique D'Acupuncture De St-Hubert | Acupuncturists | — |
| Clinique D'Acupuncture Rejean Gosselin | Alternative Health | facebook.com |
| Clinique De Gynecologue | Medical Clinics | facebook.com |
| Clinique de Physiothérapie Frédéric | Physiotherapy | facebook.com |
| Clinique De Physiothérapie La Seigneurie | Physiotherapy | facebook.com |
| Clinique L'Orchidée | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Clinique Lymphoedème Rive-sud | Tout Entreprises et services | chantalpicard.com |
| Clinique Médicale Pro-Santé Inc | Medical Clinics | — |
| Clinique Priveo Santé | Medical Clinics | — |
| Clinique Vétérinaire Quartier Animal De Longueuil | Medical Clinics | quartieranimal.com |
| Club Optimiste Laflèche | Associations | facebook.com |
| Club Photo L'Oeil Qui Voit De Saint-Hubert | Associations | facebook.com |
| Club Soccer Saint-Hubert | Associations | soccerst-hubert.com |
| CMAX - OPTICAR Peinture, matériel et carrosserie inc. | Auto Body Shop Equipment & Supplies | napacanada.com |
| Coco Frutti | Breakfast Restaurants | — |
| Coffre Inc (Centre D'Orientation & De Formation Pour Femmes En Recherche D'Emploi) | Career Counselling | facebook.com |
| COFFRE Inc. | Career Counselling | coffre.ca |
| Cogen Ébénisterie Inc | Cabinet Makers | cogenebenisterie.ca |
| Coiffure Arsène | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Chantal Lamothe | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Coiffure Charmille | Beauty & Fitness, Hairdressers & Beauty Salons | coiffurecharmille.salonpages.ca |
| Coiffure Colori | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Corum (Unisexe) | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Dy-Annie | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Helgi Enr | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Karine | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Coiffure L M Ton Style | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Le Pierrot | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Coiffure Le Pierrot | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Liberté | Beauty & Fitness, Hairdressers & Beauty Salons | coiffureliberte.com |
| Coiffure Multi-Coupe Enr | Men's Hairdressers & Barber Shops | — |
| Coiffure Myriam | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Nancy Lavoie | Beauty & Fitness, Hairdressers & Beauty Salons | coiffurenancy.ciblelocale.ca |
| Coiffure Nuance Elle et Lui | Beauty & Fitness, Hairdressers & Beauty Salons | coiffurenuance.ca |
| Coiffure Renaissance | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Suzanne | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Suzanne Grenier (Elle & Lui) | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Coiffure Thalye | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Communitec | Cable Installation, Splicing & Detection | — |
| Complexe Cousineau | Shopping Malls, Shopping Mall | — |
| Comptabilité S. Doucet | Bookkeeping | comptabilitesdoucet.com |
| Con-V-Air Inc. | Tout Entreprises et services | con-v-air.com |
| Conceptair Aviation | Aircraft Maintenance, Service & Storage | facebook.com |
| Conseil international de formation aérospatiale (CIFA) | International Organizations | cifa.cegepmontpetit.ca |
| Consommat-Air | Tout Entreprises et services | consommatair.com |
