| Carrosserie Procolor | Auto Body Shop | — |
| Carrosserie Silverstone I | Auto Body Shop | silverstoneinc.ca |
| Carson Customs Brokers Ltd. | Tout Entreprises et services | carson.ca |
| Cartotek Geo inc. | Tout Entreprises et services | cartogeo.ca |
| Centre Chiropratique Scrase | Chiropractors | — |
| Centre D'Aquarium Aquatica | Aquariums & Supplies | — |
| Centre D'Aquarium Aquatica | Aquariums & Supplies | aquariummontreal.com |
| Centre d'Entraînement Bergy Baseball | Baseball Clubs & Lessons | bergybaseball.com |
| Centre de la Petite Enfance des Employés de Bombardier Aéronautique | Child Care Equipment & Supplies | centreevombarcer.ca |
| Centre Québecois De Formation Aéronautique | Aircraft & Flight Schools | cqfa.ca |
| Cerco Câble Inc. | Tout Entreprises et services | cercocable.com |
| Chassis Carrosserie Dorval Inc | Auto Body Shop | — |
| Chemisphere Inc. | Tout Entreprises et services | chemisphere.com |
| Ching-Han Wu | wu | — |
| Cidre Purpom Québec | Cider Makers | — |
| CITY HALL | City Halls | ville.dorval.qc.ca |
| CITY HALL | City Halls | — |
| CLASQUIN | Tout Entreprises et services | clasquin.com |
| Claudia Weisser B.Comm, FMA, CIM® | Tout Entreprises et services | assante.com |
| Clinique Physio-Impact | Physiotherapy | physioimpact.com |
| Club de patinage artistique de Dorval | Tout Arts et divertissement | cpadorvalfsc.org |
| Club Vélo Dorval | Tout Arts et divertissement | clubvelodorval.org |
| CoachEasy | Fitness Gyms | coacheasy.com |
| Coiffure Mj | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Comfort Inn Aeroport | Tout Tourisme et hôtels | choicehotels.com |
| Conestoga Cold Storage | Cold-Storage Warehouses | — |
| Conseillère en Beauté Mary Kay | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Consolair Inc. | Tout Entreprises et services | consolair.ca |
| Continental Airline | Airlines | — |
| Contrôles Électriques Énertec (1989... | Tout Entreprises et services | enertec.qc.ca |
| Coop Taxi de l'Ouest | Tout Entreprises et services | taxiwestisland.com |
| Corrpro Canada Inc. | Tout Entreprises et services | azuria.com |
| Coty Canada | Life Sciences and Health Technologies (LSHT) | coty.com |
| Coty Canada Inc. | Tout Commerces au détail | coty.com |
| Coulage Adams Casting Inc | Calendars | adamscasting.com |
| Courrier Mdex | Tout Entreprises et services | courriermdex.ca |
| CPE A Petits Pas | Babysitting Services | — |
| Crossfit De L'Ouest | Fitness Gyms | crossfitdelouest.com |
| D'Amour Bicycles & Sports | Bicycle Stores | damourbicycle.com |
| Da Mangione Pizza Pasta Inc | Pizza & Pizzerias | damangione.com |
| Davanac Inc. | Tout Entreprises et services | davanac.com |
| David Ho Wo Cheong | wo | — |
| Degrémont | Life Sciences and Health Technologies (LSHT) | degremont.com |
| Delta Pharma Inc. | Life Sciences and Health Technologies (LSHT), Tout Entreprises et services | deltapharmainc.com |
| Dermtek Pharmaceutique Ltée | Life Sciences and Health Technologies (LSHT) | dermtek.com |
| Devon Dero | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Dew Auto | Auto Part Manufacturers & Wholesalers, Automobiles, car Dealers | facebook.com |
| Discovery Air Inc | Airlines | — |
| Diversi-Tech Inc. | Tout Entreprises et services | diversitech-air.com |
| Domino's Pizza | Pizza & Pizzerias | facebook.com |
