| Thérapie Pédiatrique Collage | Medical Clinics | — |
| Tibet Shangrila Boutique | Boutiques | facebook.com |
| Toile | Awning & Canopy Sales & Service | toilesurrendezvous.com |
| Toiture Mé Tallique Canada | Roofing | metalroofcanada.ca |
| Torchia Communications | Tout Entreprises et services | torchiacom.com |
| Tour D'Esprit | Shopping Mall | facebook.com |
| Traiteur Marché de Westmount | Caterers | — |
| Trésors Cachés | Antique Dealers | facebook.com |
| UC Baby | Tout Entreprises et services | ucbaby.ca |
| Ultracar | Tout Commerces au détail | ultracar.com |
| Universal Linens | Bedding & Linens | — |
| Univins | Tout Commerces au détail | univins.ca |
| Victoria Park | Beauty & Health Spas, Tout Commerces au détail | vicpark.com |
| Ville de Westmount | Tout Informations générales | westmount.org |
| Ville De Westmount | Not Profit, library | — |
| Vins Philippe Dandurand Inc | Tout Entreprises et services | vinsdandurand.com |
| Voyages Polar Bear Inc. | Tout Tourisme et hôtels | polarbeartravels.com |
| Wainberg Allen Dr | Dentists | — |
| Walter International | Tout Entreprises et services | walter.com |
| Walter Technologies Pour Surfaces Inc | Abrasives | — |
| WbC design | Tout Informatique et internet | wbcdesigns.com |
| WESTMOUNT | Blue Pages | — |
| Westmount Animal Hospital | Animal Medications | hopitalveterinairewestmount.com |
| Westmount High School | Tout Enseignement et savoir | westmount.emsb.qc.ca |
| Westmount Institute of Plastic Surg... | Tout Entreprises et services | plasticsurgery-montreal.com |
| Westmount Medical Specialists | Health Services | — |
| Westmount Payroll GP | Bookkeeping Software & Accounting Systems | facebook.com |
| Westmount Philatelic Investments | Coin Dealers & Supplies | facebook.com |
| Westmount Public Library | Not Profit, library | facebook.com |
| Westmount Shiatsu & Bodywork | Massage Therapy | westmountshiatsu.ca |
| Westmount Square Surgical Centre Inc | Medical Clinics | wssurgical.com |
| William Hardy-Abeloos Physio | Physiotherapy | — |
| Worn Doorstep | Tout Entreprises et services | worndoorstep.com |
| Yanofsky Mancuso | Business Lawyers | yanofsky.ca |
| Zone | Candles | zonemaison.com |
| Zone Concepts | Physiotherapy | — |
| École internationale de Montréal | Tout Enseignement et savoir | ecole-internationale.cssdm.gouv.qc.ca |
| École St-Léon-de-Westmount | Tout Enseignement et savoir | st-leon-de-westmount.cssdm.gouv.qc.ca |
| École Westmount Park School | Tout Enseignement et savoir | emsb.qc.ca |
