| Isolation Saint-Luc | Tout Entreprises et services | — |
| J Couture | Couture, COUTURE | — |
| J G C Services De Repro Inc | Arts & Crafts Supplies, Arts & Crafts Materials & Supplies | facebook.com |
| J Yeung Yin In | in | — |
| J-Guy Lacroix Construction | Building Contractors | — |
| J.C.B. entrepreneurs généraux | Tout Entreprises et services | jcb.ca |
| J.F. Faucher | Tout Entreprises et services | faucherbotanix.com |
| JACK & JONES | Clothing Manufacturers & Wholesalers | jack-jones.ca |
| Jack Saloon | Brasseries | jacksaloon.com |
| Jacob | Bedding & Linens | jacob.ca |
| Janine Faria Massothérapie | Massage Therapy | — |
| Jardiline Entretien Paysager | Landscaping | jardiline.ca |
| JC Spa | Massage Therapy | jcspa.ca |
| Jean-Coutu | Pharmacy | — |
| Jean-François Dubé | Architectural & Construction Specifications | — |
| Jermac Precision Inc. | Tout Entreprises et services | — |
| Jessica Coiffure | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Jeux Cerberus Games | Collectibles | facebook.com |
| Jh Bourassa | jh | — |
| Jian Xin Ge | ge | — |
| Jo Louis | Advertising Agencies | — |
| Jubinville Charron | Accounting Services | facebook.com |
| Jules Communications | Tout Entreprises et services | julescommunications.com |
| Julie Bonnin Osteopathe (D.O.) | Tout Entreprises et services | montreal-osteopathie.com |
| Jutras Architecture Inc | Architects | — |
| Jyoti Fashion | Boutiques | — |
| JYSK | Tout Commerces au détail, Furniture Stores | jysk.ca |
| JYSK Brossard - Quartier DIX30 | Furniture Stores | jysk.ca |
| K Beauty Salon | Beauty & Fitness, Hairdressers & Beauty Salons | kbeautysalon.com |
| K Lu | lu | — |
| Ka Ho Tong | ka | — |
| Ka Ho Tong | ka | — |
| Ka Shing Liu | ka | — |
| Ka-tak Chan | ka | — |
| Kaiying Commerce Int'L(Canada)Inc. | Animal Breeders | — |
| Kasam Trattoria | Caterers | facebook.com |
| Kassandra Duquette Technicienne en Pose d'Ongles | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Katherine Provost | Beauty & Fitness, Hairdressers & Beauty Salons | — |
| Kerieen | Business & Trade Organizations | — |
| Keveco | Home Improvement | — |
| Kezber | Tout Informatique et internet, Computer Repair & Cleaning | kezber.com |
| KGA Construction | Building Contractors | — |
| Kid Fundazzle | Amusement Places, Arcades | — |
| Kif Kif Import | Tout Commerces au détail | kifkifimport.com |
| Kim Long Foods | Asian Products | — |
| Kim Long Foods Inc | Bulk Foods | — |
| Kinatex Sports Physio Dix 30 Inc | Physiotherapy | kinatex.com |
| King Granite and Marble Corp. | Tout Entreprises et services | kinggraniteandmarble.com |
| Kingscraft Inc | Candles | — |
| Kinésio Concept | Fitness Gyms | studiovibrant.ca |
