| CKDG | Montréal | Blue Pages |
| Clariant Canada Inc Masterbatches Division | Lachine | Agricultural Chemicals |
| Classé Audio Inc. | Lachine | Information Technologies (IT), Tout Entreprises et services |
| CLG Computer Consultants Inc. | Saint-Henri | Tout Entreprises et services |
| Clicpomme | Montréal | Tout Informatique et internet, Computer Consultants |
| Clinique Auditive De L'Ouest | Lachine | Audiologists |
| Clinique D'Urgence 32ème Avenue Inc | Lachine | Medical Clinics |
| Clinique de Réadaptation Universelle | Lachine | Physiotherapy |
| Clinique MFML | Lachine | Tout Entreprises et services |
| Clinique Physiothérapie Universelle Lachine | Lachine | Physiotherapy |
Publicité (Desktop) Publicité (Mobile) |
| Clinique Pédiatrie | Lachine | Medical Clinics |
| Clinique Veterinaire Lachine Inc | Lachine | Animal Medications |
| Clinique Vétérinaire Sur Le Lac | Lachine | Animal Medications |
| CliqueIA Tech INC | Montréal | Computer Consultants |
| Cloudops | Montréal | Tout Informatique et internet, Computer Consultants |
| CloudOps | Montréal | Computer Consultants |
| CloudOps | Montréal | Computer Repair & Cleaning |
| CLSC De Dorval Lachine | Lachine | CLSC |
| Club de Golf Meadowbrook | Lachine | Tout Arts et divertissement |
| Club PVRH Centre d'Assistance Resso... | Brossard | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Clé en main Informatique | Montréal | Computer Networking |
| Cmyktoner | Côte Saint-Luc | Computer Networking |
| Cna | Montréal | Computer Consultants |
| Co-operators Compagnie d'Assurance | Montréal | Information Technologies (IT) |
| Coca Cola Bottling Company | Lachine | Agri-food |
| Cocoapp | Montréal | Computer Consultants |
| Cogia | Montréal | Computer Consultants |
| Coin Acceptors Inc | Montréal | Information Technologies (IT) |
| Collège Sainte-Anne de Lachine | Lachine | Tout Enseignement et savoir |
| Combustible | Montréal | Computer Networking |
Publicité (Desktop) Publicité (Mobile) |
| Commerce Montex | Montréal | Computer Room Setup, Protection, Equipment & Maintenance |
| Communications Fg Cellier | Lachine | fg |
| Complexe Canal Lachine | Saint-Henri | Tout Entreprises et services |
| Complexe du Canal Lachine | Saint-Henri | Tout Commerces au détail, Tout Entreprises et services |
| Compumatik | Montréal | Computer Repair & Cleaning |
| Computer sciences corporation | Montréal | Information Technologies (IT) |
| Computershare Trust Company of Canada | Montréal | Information Technologies (IT) |
| Conception Tekni-B | Brossard | Computer & Technology Assistance Programs |
| Connect&Go | Outremont | Computer Networking |
| Consulmac | Toronto | Computer Repair & Cleaning |
Publicité (Desktop) Publicité (Mobile) |
| Copiscope | Longueuil | Computer Accessories & Supplies |
| Corporate Aircraft Charters | Lachine | Aircraft & Private Jet Charter |
| Corporation des Bijoutiers du Québec | Lachine | Tout Commerces au détail |
| Corporation Efundraising.com Inc | Montréal | Information Technologies (IT) |
| Corporation Services Moneris | Montréal | Information Technologies (IT) |
| CORPORATION SERVICES MONERIS (CSM) | Montréal | Information Technologies (IT) |
| CORPORATION WORLDPAY CANADA | Montréal | Information Technologies (IT) |
| Courrier Can-Us Liaison | Lachine | Cans |
| Couvreur Sipa 2002 Inc | Lachine | Roofing |
| Cowper Inc. | Lachine | Tout Entreprises et services |
