The West Island (French: l’Ouest-de-l’Île) is the unofficial name given to the cities, towns and boroughs at the western end of the Island of Montreal, in Quebec, Canada. It is generally considered to consist of the municipalities of Dorval, Pointe-Claire, Kirkland, Dollard-des-Ormeaux, Beaconsfield, Baie-D’Urfé, Sainte-Anne-de-Bellevue, the village of Senneville, and two boroughs of the city of Montreal: Pierrefonds-Roxboro and L’Île-Bizard–Sainte-Geneviève.

The region is home to the Montréal–Trudeau International Airport, John Abbott College, Cégep Gérald-Godin, the Macdonald Campus of McGill University, the Fairview Pointe-Claire and Galeries des Sources malls, as well as Montreal’s largest park, the Cap-Saint-Jacques Nature Park. Hospitals include the Veteran’s Hospital in Sainte-Anne’s and the Lakeshore General Hospital in Pointe-Claire. Municipalities range in character from the modern bedroom communities of Kirkland or Dollard-des-Ormeaux to the former cottage-country homes of Dorval, Pointe-Claire, and Beaconsfield. Development and the concentration of industrial activity along highways 20, 40 and 15 over the last twenty years has made securing the region’s remaining tracts of open land a priority for many West Island residents. Indeed, the West Island is home to one of the last large remaining tracts of Montreal-region wilderness on island.