| 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 Pex Discount Inc | Lachine | Bedding & Linens |
| Aai Encanteurs Assoc Intl | Lachine | Auctions |
| Abu-Lasia/ Matamin | Lachine | Baked Goods Wholesalers |
| Acces Physio Collège Charles-Lemoyne | Delson | Physiotherapy |
| Accessoires Rose Blanche | Lachine | Bakery Equipment, Bakery Supplies |
Publicité (Desktop) Publicité (Mobile) |
| Accord Expositions | Lachine | Tout Entreprises et services |
| Acier Lachine Inc | Lachine | Aluminum |
| Acupuncteure Certifiée Pascale Tremblay | Delson | Acupuncturists |
| ADI Global Distribution | Lachine | Tout Entreprises et services |
| Adl Esthétique Automobile | Delson | Car Detailing |
| ADM Canada | Lachine | Tout Entreprises et services |
| Affiliated Sport Group | Lachine | Tout Entreprises et services |
| Agence Imapro Inc | Lachine | Business & Trade Organizations |
| Agence Parcs Canada | Montréal | Not Profit, library |
| Ahuntsic Cartierville Culture Sports Récreation Libraries Ahuntsic | Montréal | Not Profit, library |
Publicité (Desktop) Publicité (Mobile) |
| AIDA Distribution | Lachine | Beverage Distributors & Bottlers |
| Aiguisatek | Delson | Tout Entreprises et services |
| Air Pro Transport 2009 | Lachine | Air Cargo Service |
| Alain Normandin Rénovation | Lachine | Home Improvement |
| Alain-Grandbois Bibliotheques | Laval | Not Profit, library |
| Aliments Morehouse Canada Inc | Lachine | Agri-food |
| Aliments T & N (Les) | Lachine | Agri-food |
| Alipro-Mistral Ingrédients Inc | Delson | Agri-food |
| Alkalima Christian Store | Montréal | Not Profit, library |
| Allstream | Lachine | Information Technologies (IT), Tout Entreprises et services, Tout Informatique et internet |
Publicité (Desktop) Publicité (Mobile) |
| Alongi | Lachine | Tout Commerces au détail, Tout Entreprises et services |
| Always B Clean | Lachine | Home Improvement |
| AMD Ritmed Inc. | Québec | Life Sciences and Health Technologies (LSHT) |
| AMJ Campbell Van Lines | Lachine | Tout Entreprises et services |
| Andrew & Friends - 90 Day Challenge | Lachine | Beauty Salon Equipment & Supplies |
| Anixia | Lachine | Calendars |
| Annie Cyr Conseillère Indépendante Scentsy | Lachine | Aromatherapy |
| Apex Performance | Delson | Fitness Gyms |
| ARCHIVES IRON MOUNTAIN | Lachine | Information Technologies (IT) |
| Archives municipales | Montréal | Not Profit, library |
Publicité (Desktop) Publicité (Mobile) |
| Arena Pizzeria | Lachine | Pizza & Pizzerias |
| Arena Tasty Pizzeria Lachine Restaurant | Lachine | Pizza & Pizzerias |
| Aroua Tek Inc | Delson | Appliance Manufacturers & Wholesalers |
| Arrondissement de Lachine | Montréal | Tout Informations générales |
| Arrondissement de Lachine | Lachine | Not Profit, library |
| Arrondissement Verdun | Verdun | Not Profit, library |
| Art Forge | Lachine | Art Foundries |
| Artothèque De Montréal | Montréal | Not Profit, Tout Arts et divertissement, library |
| Aréna | Delson | Arenas, Stadiums & Athletic Fields |
| Ashley's Little Gift Shop | Lachine | Candles |
