| Natpro | Dorval | Compressors |
| Nestlé Canada (Ice Cream Division) GROUPE PERRIER DU CANADA LTÉE (LE) | Dorval | Agri-food |
| Nickels | Dorval | Tout Bars et restaurants |
| NIL8 Fitness | Dorval | Fitness Gyms |
| Nimpro Chemicals Ltd | Dorval | Chemicals |
| Nolinor Aviation | Dorval | Tout Entreprises et services |
| Nolinor Aviation Inc | Dorval | Airlines |
| Nortop Canada Inc | Dorval | Tire Shop |
| Nortop Canada Inc. (Pneus Nortop) | Dorval | Tire Shop |
| Nova Steel | Dorval | Tout Entreprises et services |
Publicité (Desktop) Publicité (Mobile) |
| Novartis Pharma Canada Inc. | Dorval | Life Sciences and Health Technologies (LSHT), Tout Entreprises et services |
| Novyc Électronique Inc. | Dorval | Tout Entreprises et services |
| Odyssey Medispa | Dorval | Health and Beauty |
| OG Aviation Inc | Dorval | Aviation Consultants & Services |
| Olympic Airlines | Dorval | Airlines |
| Omnimedia Inc. | Dorval | Tout Entreprises et services |
| Omnitrans Inc. | Dorval | Tout Entreprises et services |
| One Spa Retreat Montreal | Dorval | Aromatherapy |
| Opsis Services Aéroportuaires Inc | Dorval | Airports |
| P Za | Dorval | za |
Publicité (Desktop) Publicité (Mobile) |
| Paprima Industries Inc. | Dorval | Tout Entreprises et services |
| Park'n Fly | Dorval | Airport Parking |
| Parker-Hannifin Canada | Dorval | Tout Entreprises et services |
| PDQ 5 - SPVM (Dorval, L'Île-Dorval, Pointe-Claire - Poste de quartier 5 - Service de Police de la Ville de Montréal - SPVM) | Pointe-Claire | Emergency |
| Performance Transmission | Dorval | Transmission Repair |
| Pestroy Chemical Co Inc | Dorval | Chemicals |
| Pharmacie Les Jardins Dorval | Dorval | Pharmacy |
| Pharmacie Mina Mikhail Inc | Dorval | Pharmacy |
| Physio Dorval | Dorval | Physiotherapy |
| PIECE D’AUTO DORVAL Inc. | Dorval | Automobiles |
Publicité (Desktop) Publicité (Mobile) |
| Pizza M | Dorval | Pizza & Pizzerias |
| Pizzeria Des Sources | Dorval | Pizza & Pizzerias |
| Pièces d'Auto Dorval (1989) | Dorval | Auto Part Manufacturers & Wholesalers |
| Planchers Bois Franc Golden Elite | Dorval | Tout Entreprises et services |
| Planterra Inc. | Dorval | Tout Commerces au détail |
| Planterra Ltée | Dorval | Christmas Trees |
| Planterra Ltée | Dorval | Christmas Trees |
| Plaza Dorval | Dorval | Apartment Hotels |
| PME MTL | Dorval | Tout Entreprises et services |
| Pneus Du Source | Dorval | Tire Shop |
Publicité (Desktop) Publicité (Mobile) |
| Pneus Rallye Ltée | Dorval | Tire Shop |
| Pneus Unik | Dorval | Tire Shop |
| PO-Labs | Dorval | Life Sciences and Health Technologies (LSHT) |
| POLVIGÉ TECHNOLOGIES INC. | Dorval | Aerospace |
| Porter Airlines | Dorval | Airline Ticket Agencies |
| Porter Airlines | Dorval | Airlines |
| Porter Airlines | Dorval | Airlines |
| Premiere Executive Suites | Dorval | Apartment Hotels, Tout Entreprises et services |
| Presstine Marketing Inc | Dorval | Collectibles |
| Prestige Generatrices Inc | Dorval | Generators |
