| Sports Mineurs St Vincent | Association Management | facebook.com |
| Squish | Candy & Confectionery Stores | — |
| St-Laurent Coiffure Trends | Beauty & Fitness, Hairdressers & Beauty Salons | stlaurentcoiffure.ca |
| ST. NICHOLAS Greek Orthodox Church, LAVAL | Blue Pages | — |
| ST. NICHOLAS SCHOOL | Blue Pages | — |
| Star Limousines | Chauffeur Services | starlimousines.ca |
| Stitch It | Clothing Alterations | stitchit.co |
| STL Automatisation & Contrôle | Automation Systems & Equipment | stldist.ca |
| Streakz Coiffure Inc | Beauty & Fitness, Hairdressers & Beauty Salons | streakzcoiffure.com |
| STRIFAS, PANAGIOTIS (PETER) | Home Decoration & Maintenance, Real Estate Agencies / Agents | lesimmeubleskronos.com |
| Stright-MacKay | Boat Equipment & Supplies, Marine Equipment & Supplies | — |
| Student Works Painting | Painters | — |
| Studio 13 Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | studio13coiffure.com |
| Studio Be - Pilates/Yoga | Fitness Gyms | garage13.com.au |
| Studio Belcanto | Art Schools | facebook.com |
| Studio Capelli | Beauty & Fitness, Hairdressers & Beauty Salons | facebook.com |
| Sty'l Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Styliste Coiffeuse | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Stéfanair | Air Conditioning Systems & Parts | stefanair.com |
| Stéphanie Rousseau Ostéopathe D.O | Health and Beauty | facebook.com |
| Subaru de Laval | Tout Commerces au détail | subarudelaval.ca |
| SubQuebec.com | Tout Arts et divertissement | subquebec.com |
| Sunbelt | Business Brokers | — |
| Sunbelt Rentals Power & HVAC | Air Conditioning Systems & Parts | sunbeltrentals.com |
| SUNLIFE Financial | Finances / Banking, Financial Consultants, Home Decoration & Maintenance, Insurance Brokers / Agencies, Investments | — |
| Super Céramique | Ceramic Tile Manufacturers & Distributors | superceramique.ca |
| Super Moto Sport | All-Terrain Vehicles | — |
| Super-Dry Systèmes Inc | Compressors | — |
| Suprême Cintres & Produits | Chemical Storage & Handling | supremequebec.ca |
| Supérieur Propane Inc. | Tout Entreprises et services | superiorpropane.com |
| Surplus Chomedey | Medical Clinics | — |
| Surplus RD Inc | Furniture Stores | — |
| Suzanne Couture | Couture, COUTURE | — |
| Swann Ste-Dorothée | Fitness Gyms | — |
| SYKEOTON MONTREAL, ASSOCIATION | Blue Pages | — |
| Syndicat Csn Clsc Du Marigot | CLSC | facebook.com |
| Synergimax International | Tout Entreprises et services | synergimax-international.com |
| Système De Chauffage R Ledoux Inc | Air Purifiers | rledoux.ca |
| Systèmes Informatique Unik | Tout Informatique et internet | siunik.ca |
| Systèmes Verint Canada Inc | Information Technologies (IT) | verintsystems.com |
| Sécurité AJ Inc | Car Alarm Systems | ajsecurite.com |
| T A P I Cherrier Inc Division Protection Incendie | Automatic Fire Sprinkler Systems | tapicherrierinc.ca |
| TA ELLINOKANADIKA NEA | Blue Pages | — |
| Tactikal 1426 | Fitness Gyms | tactikal1426.com |
| Taillefer Julie Dre | Chiropractors | santedudos.com |
| Takano | Beauty Salon Equipment & Supplies | — |
| Takano Inc. | Tout Entreprises et services | takanocanada.com |
| Talbot Et Associés | Auctions | facebook.com |
| Tanguay L'Entrepôt Laval | Furniture Stores | tanguay.ca |
| Tapis Superieur Inc | Flooring | — |
