| 1230 Électroniques | Lachine | Computer Repair & Cleaning |
| 123inkcartridges.ca | Lachine | Camera & Photo Equipment Stores |
| 9132-1000 Québec Inc | Lachine | Business & Trade Organizations |
| 9334-4349 Quebec Inc | Lachine | Pizza & Pizzerias |
| A Asselin & Fils Inc | Lachine | Plumbing |
| A Couture | Lasalle | Couture, COUTURE |
| A Couture | Lasalle | Couture, COUTURE |
| A Pex Discount Inc | Lachine | Bedding & Linens |
| Aai Encanteurs Assoc Intl | Lachine | Auctions |
| Abra Electronics Corp. | Montréal | Tout Commerces au détail, Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Abu-Lasia/ Matamin | Lachine | Baked Goods Wholesalers |
| AC Lasalle | Sainte-Catherine | Cabinet Makers |
| Accessoires Rose Blanche | Lachine | Bakery Equipment, Bakery Supplies |
| Accord Expositions | Lachine | Tout Entreprises et services |
| Acier Lachine Inc | Lachine | Aluminum |
| Actron Electrique 2000 Inc | Lasalle | Electricians |
| ADI Global Distribution | Lachine | Tout Entreprises et services |
| ADM Canada | Lachine | Tout Entreprises et services |
| ADT Déménagement et Entreposage | Lasalle | Tout Entreprises et services |
| Adven | Lasalle | Airline Ticket Agencies |
Publicité (Desktop) Publicité (Mobile) |
| Affiliated Sport Group | Lachine | Tout Entreprises et services |
| Agence de Recouvrement Lasalle Inc | Montréal | Collection Agencies |
| Agence Imapro Inc | Lachine | Business & Trade Organizations |
| Agi Électrique 9377-0295 Québec Inc | Lasalle | Electricians |
| AIDA Distribution | Lachine | Beverage Distributors & Bottlers |
| Air Pro Transport 2009 | Lachine | Air Cargo Service |
| Airtech Armstrong | Lasalle | Air Purifiers |
| AJM Unifer Soudure | Lasalle | Balconies |
| Alain Normandin Rénovation | Lachine | Home Improvement |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
Publicité (Desktop) Publicité (Mobile) |
| Aliments T & N (Les) | Lachine | Agri-food |
| Allard & Ricard Inc | Lasalle | Plumbing |
| Allard Technologies Inc. | Lasalle | Tout Entreprises et services |
| Allion Elementary School | Lasalle | Tout Enseignement et savoir |
| Allstream | Lachine | Information Technologies (IT), Tout Entreprises et services, Tout Informatique et internet |
| Alongi | Lachine | Tout Commerces au détail, Tout Entreprises et services |
| Alpha plantes | Lasalle | Tout Commerces au détail |
| Alternativa Massage & Rehabilitation | Lasalle | Massage Therapy |
| Always B Clean | Lachine | Home Improvement |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
Publicité (Desktop) Publicité (Mobile) |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| Anderson Inc | Lasalle | Bakery Equipment, Bakery Supplies |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| André Ferron, sculpteur | Lasalle | Tout Arts et divertissement |
| Anixia | Lachine | Calendars |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
| Applied Electronics Limited | Montréal | Audiovisual Equipment & Supplies |
| Applied Electronics Ltd. | Ville-Émard Et Côte-Saint-Paul | Tout Entreprises et services |
| Aramark Canada Ltée | Lasalle | Coffee Machines & Roasting Equipment |
| Aramark Refreshment | Lasalle | Coffee Break Services & Supplies |
