| Copiscope | Computer Accessories & Supplies | gestionram.com |
| Corporation de l'industrie touristi... | Tout Entreprises et services, Tout Tourisme et hôtels | citq.qc.ca |
| Cosmeta | Beauty & Fitness, Hairdressers & Beauty Salons | cosmeta.ca |
| Couche-Tard | Beer & Ale | quebec.couche-tard.com |
| Coup' Acabana | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Cour municipale | Business Centres | facebook.com |
| Courrier Rive-Sud inc. | Tout Entreprises et services | courrierrivesud.ca |
| Couture Murena Aubut | Couture, COUTURE | — |
| Couture Suzanne | Couture, COUTURE | — |
| Coutures et Toiles Jade | Awning & Canopy Sales & Service | toilesjade.ca |
| CPE DU QUARTIER | Childcare Services | facebook.com |
| CPE Le Petit Prince | Childcare Services | cpelepetitprince.org |
| CPE Pierrot La Lune, SiègeSocial,InstallationArlequin | Childcare Services | — |
| CPU Info | Bookkeeping | facebook.com |
| Creation M | Furniture Stores | facebook.com |
| Creation Pamplemouus | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Creations Aux Mille Images | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Creations Mystik | Business Centres | facebook.com |
| Croisières Navark | Tout Tourisme et hôtels | — |
| Croisières Navark | Boat Charter & Tours | navark.ca |
| Crossfit MECK | Fitness Gyms | crossfitmeck.com |
| Crossfit Meck | Fitness Gyms | — |
| Crossfit MP | Fitness Gyms | facebook.com |
| Crystal Lotus Massage | Massage Therapy | — |
| Créations Sophie B. | Arts & Crafts Supplies, Arts & Crafts Materials & Supplies | — |
| Cuir Nene | Clothing Stores | facebook.com |
| Cute Kids | Children's Clothing Stores | facebook.com |
| Cyclocross Velo 2000 | Arenas, Stadiums & Athletic Fields | facebook.com |
| Cyrano Services Inc | Bakery Equipment, Bakery Supplies | — |
| Céramique Rosa Elite | Ceramic Tile Dealers | ceramiquerosalongueuil.ca |
| Cérat Yves Dr | Medical Clinics | facebook.com |
| D + H Interchèques | Information Technologies (IT) | dhltd.com |
| D Couture | Couture, COUTURE | — |
| D-Box | Tout Entreprises et services | d-box.com |
| Daikin Applied Canada Inc | Air Conditioning Systems & Parts | — |
| Daikin Comfort | Air Conditioning Systems & Parts | daikincomfort.com |
| Dalia Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | cheveuxetplus.com |
| Dan A Sheba | Community Service & Charitable Organizations | — |
| Daniel As | as | — |
| Darveau Et Associe Huissiers De Justice | Bailiffs | facebook.com |
| Dasbox Systèmes | Shopping Mall | facebook.com |
| David Campbell Massothérapeute - Massage Therapi st | Massage Therapy | — |
| David Couture-Hacquin | Couture, COUTURE | — |
| Day And Ross | Artists | — |
| DC Massothérapie | Massage Therapy | — |
| De Cabana | Clothing Stores | facebook.com |
| De Lacroix Design | Tout Commerces au détail, Furniture Stores | meubles.ca |
| De Notre Dame Eulalie Soeur | Caisses Populaires | — |
| Dealer Live Inc | Computer Networking | facebook.com |
| Decalco Design | Business Centres | facebook.com |
