| 1230 Électroniques | Computer Repair & Cleaning | facebook.com |
| 123inkcartridges.ca | Camera & Photo Equipment Stores | — |
| 9132-1000 Québec Inc | Business & Trade Organizations | — |
| 9334-4349 Quebec Inc | Pizza & Pizzerias | pizza2pointes.com |
| A Asselin & Fils Inc | Plumbing | — |
| A Pex Discount Inc | Bedding & Linens | facebook.com |
| Aai Encanteurs Assoc Intl | Auctions | facebook.com |
| Abu-Lasia/ Matamin | Baked Goods Wholesalers | — |
| Accessoires Rose Blanche | Bakery Equipment, Bakery Supplies | — |
| Accord Expositions | Tout Entreprises et services | accordex.com |
| Acier Lachine Inc | Aluminum | acierlachine.com |
| ADI Global Distribution | Tout Entreprises et services | fr.adiglobaldistribution.ca |
| ADM Canada | Tout Entreprises et services | admcanada.com |
| Affiliated Sport Group | Tout Entreprises et services | affiliated-sports.com |
| Agence Imapro Inc | Business & Trade Organizations | bizdirlib.com |
| AIDA Distribution | Beverage Distributors & Bottlers | aidadistribution.com |
| Air Pro Transport 2009 | Air Cargo Service | airprotransport.com |
| Alain Normandin Rénovation | Home Improvement | — |
| Aliments Morehouse Canada Inc | Agri-food | morehousefoods.com |
| Aliments T & N (Les) | Agri-food | tnfoods.com |
| Allstream | Information Technologies (IT), Tout Entreprises et services, Tout Informatique et internet | allstream.com |
| Alongi | Tout Commerces au détail, Tout Entreprises et services | alongi.com |
| Always B Clean | Home Improvement | — |
| AMJ Campbell Van Lines | Tout Entreprises et services | amjcampbell.com |
| Andrew & Friends - 90 Day Challenge | Beauty Salon Equipment & Supplies | — |
| Anixia | Calendars | — |
| Annie Cyr Conseillère Indépendante Scentsy | Aromatherapy | — |
| ARCHIVES IRON MOUNTAIN | Information Technologies (IT) | ironmountain.com |
| Arena Pizzeria | Pizza & Pizzerias | arenalachine.com |
| Arena Tasty Pizzeria Lachine Restaurant | Pizza & Pizzerias | lachinearenapizza.ca |
| Arrondissement de Lachine | Not Profit, library | — |
| Art Forge | Art Foundries | artforge.ca |
| Ashley's Little Gift Shop | Candles | facebook.com |
| Association des Techniciens en Sant... | Tout Entreprises et services | atsaq.org |
| Assurance123.ca | Tout Entreprises et services | assurance123.ca |
| Auto Camping | Auto Part Manufacturers & Wholesalers | autocamping.ca |
| Auto Kool | Auto Part Manufacturers & Wholesalers | auto-kool.com |
| Auto Shaltas Garage Inc | Auto Body Shop | facebook.com |
| Autobus Montroyal Inc | Chauffeur Services | autobusmontroyal.com |
| Automaticash | Automated Teller Manufacturers & Wholesalers | facebook.com |
| Autos Internationales Lachine | Tout Commerces au détail | autosinternationales.com |
| Avenant SST Inc | Health Services | — |
| Aéro-Mag 2000 Inc | Aircraft Maintenance, Service & Storage | — |
| Bar Le Griffon | Brasseries | — |
| Bar Le Griffon | Brasseries | — |
| Bardeco | Tout Bars et restaurants | bardeco.com |
| Bariatrix Nutrition | Tout Entreprises et services | bariatrix.com |
| Barrette & Associés | Tout Entreprises et services | barretteavocats.com |
| Belvedere Bowling Inc | Bowling | belvederebowlinginc1.placeweb.site |
| Bicyclettes Rossi | Tout Commerces au détail | rossibikes.com |
