| Les Productions Phaneuf inc. | Tout Entreprises et services | phaneuf.ca |
| Les Service D'Auto Alex Plus | Car Repair | — |
| Les services Bien Chez Soi | Tout Commerces au détail, Tout Entreprises et services | bienchezsoi.ca |
| Les Solutions One-Sky | Tout Informatique et internet | one-sky.ca |
| Les Specialistes du financement | Automobiles, car Dealers | automobilesexclusives.com |
| Les Spécialistes du Financement.com | Automobiles, Auto Services, Car Dealers | lesspecialistesdufinancement.com |
| Les Traductions St-François | Tout Entreprises et services | tradsf.com |
| Les Trouvailles De Girouette | Antique Dealers | facebook.com |
| Letenda Inc | Bus & Coach Lines | facebook.com |
| Letenda inc | Clean Technologies | letenda.com |
| Lettrage Scripsit Inc. | Tout Entreprises et services | scripsit.net |
| Liberte Informatique | Computer Cabling, Installation & Service | facebook.com |
| Librairie Coopérative Édouard-Montp... | Tout Commerces au détail | coopmontpetit.com |
| Librairie Icitte | Book Stores | amazon.ca |
| Limousines Rive Sud | Chauffeur Services | — |
| Lingo | Clubs | clublingo.wordpress.com |
| LIPAQ Brault et Bouthillier | Child Care Equipment & Supplies | bb.ca |
| Lisette Couture | Couture, COUTURE | — |
| Livingstone International | Bookkeeping Software & Accounting Systems | — |
| Livraison Mon Resto | Alcohol, Liquor & Food Delivery | facebook.com |
| Lla Architecture | Architects | — |
| Loblaw Pharmacy | Pharmacy | — |
| Locaconcept | Chauffeur Services | locaconcept.ca |
| Location Chapiteau Bliksem | Circus Troupes | facebook.com |
| Location de voiture pour mariage André Sirois | Car Rental | — |
| Location Delvan | Tout Commerces au détail | delvan.ca |
| Locations D'Autos Ă Rabais | Car Washes | locationdautoarabais.com |
| Loctite Canada Inc | Shopping Mall | facebook.com |
| Logiciels Xceed Inc. | Tout Informatique et internet | xceed.com |
| Lohdrey's Bakery | Bakeries | — |
| Loiselle Caroline Dr | Chiropractors | santechiropratique.com |
| Lolë | Tout Commerces au détail, Tout Entreprises et services | lolelife.com |
| Longueuil Aluminium Rénovation Enr | Aluminum | — |
| Longueuil Photo | Tout Commerces au détail | longueuilphoto.com |
| Longueuil Toyota- Automobiles d'Occasion | Automobiles, Auto Services, Car Dealers | facebook.com |
| Lotus Enchanté | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Lou Nissart | Tout Bars et restaurants | lelounissart.com |
| Louis Houle Architecte | Architects | — |
| LRBG Chemicals Inc | Chemicals | — |
| Luna | Clothing Stores | facebook.com |
| Luxury King | Car Rental | facebook.com |
| Lydia Pawelak | Tout Entreprises et services | fengshuimontreal.com |
| LYS Marine | Boat Repair & Maintenance | facebook.com |
| M Couture | Couture, COUTURE | — |
| M-Massage | Beauty & Health Spas | — |
| Maburco Longueuil Inc | Bathroom Accessories | — |
| Madam Salon De Beauté | Beauty Institutes | lamaisonmadam.com |
| Maison De Beauté Saint-Laurent | Beauty & Fitness, Hairdressers & Beauty Salons | mb-saintlaurent.com |
| Maison Jaffys Rembourrage | Beds | facebook.com |
| Maison Le Virevolte | Community Service & Charitable Organizations | facebook.com |
