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

Beaconsfield is a suburb on the Island of Montreal, Quebec, Canada, part of the Greater Montreal region locally referred to as the West Island. It is a prestigious residential community located on the north shore of Lac Saint-Louis, bordered on the west by Baie-D'Urfé, north by Kirkland and east by Pointe-Claire.