| Chez Katou Esthétique | Beauty & Fitness, Hairdressers & Beauty Salons | globalwealthtrade.com |
| Chez Soin Retraite Ménager | Cleaning Services, Cleaning Service | — |
| Chhay Te | te | — |
| Choko Design International Inc. | Tout Commerces au détail | chokodesign.com |
| Chong Hay So | so | — |
| Château Marbre et Granit | Tout Entreprises et services | chateaumarbre.com |
| Ciaburro Hugo Dr | Health Services | facebook.com |
| Cie D'Entretien Techni-Marbre Inc | Ceramic Tile Installers & Contractors | facebook.com |
| Clic | Agri-food | clicfoods.com |
| Climatisation Nl | Electricians | — |
| Clinique d'Anesthésie Dentaire Anjou | Dentists | specialistesdentaires.com |
| Clinique De Rétine De L'Est | Health Services | cliniqueretinedelest.com |
| Clinique Dentaire Alvaro & Chamlian | Automobiles, Dentists, Not Profit | dentistesquebec.org |
| Clinique Dentaire Beydoun | Tout Entreprises et services | twitter.com |
| Clinique Dentaire Isabelle Rivest | Automobiles, Dentists, Not Profit | cliniquedentairedreisabellerivest.ca |
| Clinique Dentaire Lacordaire | Automobiles, Dentists, Not Profit | graziellajarjoura.com |
| Clinique Dentaire Place Viau | Dentists | cliniquedentaireplaceviau.com |
| Clinique Dentaire Pro Dent | Dentists | dentistesl.com |
| Clinique Le Port D'Attach | Not Profit, Medical Clinics | — |
| Clinique Médicale Viau | Not Profit, Medical Clinics | — |
| Clinique Vétérinaire Lacordaire | Animal Medications | veterinairelacordaire.com |
| CLSC Saint-Leonard | Blue Pages | — |
| Club De Danse Sociale Le Rendez-Vous | Auditoriums & Halls | le-rendez-vous.ca |
| CMTIGROUP | Aerospace | cmtigroup.com |
| Coiffure Color Trends | Beauty & Fitness, Hairdressers & Beauty Salons | colortrendscoiffure1.placeweb.site |
| Coiffure Epoca | Beauty & Fitness, Hairdressers & Beauty Salons | epocacoiffure.com |
| Coiffure Intime | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure à Bas Prix | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coin Solutions Affaires | Bookkeeping Software & Accounting Systems | facebook.com |
| Commensal | Tout Entreprises et services | commensal.com |
| Compagnie De Carrelages Carmine | Flooring | — |
| Constru-Flex Inc | Building Material Manufacturers & Wholesalers | facebook.com |
| Construction EBC Inc | Building Contractors | facebook.com |
| Construction HAM Inc | Home Improvement | — |
| Construction L Design | Kitchen Cabinets | facebook.com |
| Construction Nava | Home Improvement | facebook.com |
| Construction Pajo Inc | Home Improvement | victorbourdages.com |
| Construction Pl | Building Contractors | constructionpl.com |
| Construction RAYTECH | HVAC | facebook.com |
| Cool Painting | Painters | cool-painting.ca |
| Corporation De Reliance Economique Et Co | Associations | — |
| Cosa Studio | Beauty & Fitness, Hairdressers & Beauty Salons | cosa-studio.coiffure.villedesaintleonard.tel |
| Couverture Montréal Nord Ltée | Tout Entreprises et services | couverturemontrealnord.com |
| Couvertures Élastotoit Inc | Roofing | — |
| Couvreurs de l'Est (Montréal) Ltée | Roofing | lecouvreur.ca |
| CPL Comptabilité | Accounting Services | dora-comptabilite.com |
| Crossfit 6183 | Fitness Gyms | — |
| Crt Body Works | Auto Body Shop | crtbodyworks.com |
| Crédit Fédéral Commercial | Collection Agencies | facebook.com |
| Cuisimode Design | Kitchen Cabinets | cuisimodedesign.com |
