| Sca Caroline Coulombe | Bookkeeping | — |
| SCG Witchery | Astrologers & Psychics | scgwitchery.com |
| Schneider Canada Inc | Life Sciences and Health Technologies (LSHT) | schneider-electric.ca |
| Senmark Inc | Furniture Stores | facebook.com |
| Service Comptable GM | Bookkeeping Software & Accounting Systems | facebook.com |
| Service De Réparation D'électroménager Longueuil | Appliance Repair & Service | — |
| Service De Scellement De Conduit De Chauffage À Gatineau Aeroseal | Air Conditioning Systems & Parts | — |
| Service Immobiliers à la carte | Tout Entreprises et services | sialacarte.com |
| Services Conseils Sophie Lafontaine Inc | Accountants | — |
| Services Nery Peintres | Painters | — |
| Services Tail Shift Média | Advertising Agencies | facebook.com |
| SGTOP BUSINESS INC | Alcohol, Liquor & Food Delivery | sgtopbusinessinc.com |
| Shagg Communications | Communications & Public Relations Consultants | shaggcommunications.com |
| Shaista Jalal Henna Artist | Artists | facebook.com |
| Shan Boutique | Bikinis, Swimsuits & Swimming Accessories | facebook.com |
| Sharp Strategies | Communications & Public Relations Consultants | facebook.com |
| Shawarma Express | Pizza & Pizzerias | — |
| Shi Qi Wang | qz | — |
| Signé Local | Tout Commerces au détail | signelocal.com |
| Sik Nang To | tz | — |
| Simdc | Shopping Mall | facebook.com |
| Simon Caméra | Camera & Photo Equipment Stores | simoncamera.com |
| Sino-Québec de la Rive-Sud | Tout Communautés et société | centresinoquebec.com |
| Siyu Ye | ye | — |
| SM Remorquage | Boat Towing | — |
| Social Media Marketing Qc | Communications & Public Relations Consultants | facebook.com |
| Socotrop Senc | Arts & Crafts Supplies, Arts & Crafts Materials & Supplies | — |
| SODA - Espace ados de la Bibliothèque de Bross ard | Not Profit, library, Library | — |
| Soins Mobiles | Care Homes | soinsmobiles.com |
| Solabs | Tout Informatique et internet | solabs.com |
| Solus Automatisation Inc | Automation Systems & Equipment | — |
| Solution REP | Landscaping | facebook.com |
| Solutions Consortech Inc. | Tout Entreprises et services | consortech.com |
| Solutions Gapask | Shopping Mall | facebook.com |
| Solutions MSL | Computer Data Recovery | solutionsmsl.com |
| Soulevement de Bâtiment Expert | Building & House Movers | — |
| Soulier | Boots | ca.shop.ecco.com |
| SP Aluminium | Aluminum | — |
| Spa Oceane Inc | Health and Beauty | — |
| Spa Zen | Health and Beauty | — |
| Spectrum Auto Inc | Auto Body Shop | spectrum-auto.com |
| Spj Distribution Inc | Computer Manufacturers & Wholesalers | spjdistribution.com |
| SPJ Distributions | Computer Manufacturers & Wholesalers | — |
| Sports aux puces Saint-Jean | Tout Commerces au détail | sapstjean.com |
| Sports Experts | Camping Equipment | atmosphere.ca |
| Spécial-T-Baignoire | Bathtub Refinishing & Repairing | mabaignoire.ca |
| Spécialiste D'électroménager | Appliance Parts & Supplies | — |
| St-Jean Bearing Ltée | Tout Entreprises et services | st-jean-bearing.com |
| St-Johns Elementary School | Tout Enseignement et savoir | rsb.qc.ca |
| St-Johns High School | Tout Enseignement et savoir | rsb.qc.ca |
