| Coiffure Unité Mobile | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Universelle | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Veronica | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Coiffure Vimont | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Colgate-Palmolive Canada Inc. | Tout Entreprises et services | colgate.com |
| Collins Chaussures & Vêtements de Travail | Adaptive Clothing | collins.ca |
| Collins Safety Shoes | Adaptive Clothing | collins.ca |
| Collège Letendre | Camps | — |
| Comairco | Tout Entreprises et services | comairco.com |
| Comairco | Compressors | comairco.ca |
| Comairco | Compressors | facebook.com |
| Come Couture | Couture, COUTURE | — |
| Comfort Keepers | Senior Residences – Elderly Care, Services | comfortkeepers.ca |
| Communication BM | Ad Production | — |
| Complexe Chiropratique St-Maxime | Chiropractors | facebook.com |
| ComprimAir Inc | Compressors | comprimair.com |
| Concept Elite Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | concept-elite.ca |
| Concepts Pam Gm | Clothing Manufacturers & Wholesalers | pamgm.com |
| Concordia Physio Sport | Physiotherapy | facebook.com |
| Concordia Physio Sport - Laval | Physiotherapy | cbi.ca |
| Confection Sylvie Lessard Enr | Furniture Stores | facebook.com |
| Confiserie Mondoux Inc | Candy & Confectionery Manufacturers & Wholesalers | mondoux.qc.ca |
| Confiserie Traditionnelle Du Mexique | Candy & Confectionery Stores | facebook.com |
| Connex Voyez le Service Inc | Information Technologies (IT) | connexservice.ca |
| Conseil des Palettes du Canada | Shopping Mall | facebook.com |
| Consensus Conseillers Juridiques | Bankruptcy Lawyers | — |
| Constantine Entretien Ménager | Cleaning Services, Cleaning Service | — |
| Construction F.Lévesque | Architectural & Construction Specifications | — |
| Construction Joanel Inc | Ceilings | facebook.com |
| Construction MLSR Inc | Building Contractors | constructionmlsr.com |
| Construction Mon Toit Inc | Roofing | — |
| Construction Renovation Toiture Ouimet | Roofing | facebook.com |
| Construlux Inc | Home Improvement | construlux.com |
| Consultant Zeal Pour La Vie | Fitness Gyms | — |
| Consultants En Récupération A Douville & Ass Lté e | Auctions | facebook.com |
| Consultation Médic Plus. | Medical Clinics | consultationmedicplus.ca |
| Conteneurs X-Press | Building Material Manufacturers & Wholesalers | — |
| Cool Expert Climatisation | Air Conditioning Contractors | coolexpert.ca |
| Cooper Vision Inc. | Tout Entreprises et services | coopervision.com |
| COPIE RAPIDE | Graphics & Printing | — |
| Corealis Pharma | Life Sciences and Health Technologies (LSHT) | corealispharma.com |
| Corporation alimentaire Whyte's Inc. | Agri-food | whytes.ca |
| Corporation Caterpillar du Canada | Information Technologies (IT) | caterpillar.com |
| Corporation Conseil Bdg Inc | Chemicals | facebook.com |
| Corporation Silhouet-Tone | Life Sciences and Health Technologies (LSHT) | silhouettone.com |
| Cosmodôme | Camps | cosmodome.org |
| Cosmétique Mary Kay | Health and Beauty | — |
| CourchesneCollection | Furniture Stores | — |
| Coursol Claude Me | Bankruptcy Lawyers | — |
| Courtier Renovation | Home Improvement | facebook.com |
