L'Île-Dorval is a city in southwestern Quebec, Canada. It is coterminous with Dorval Island, an island in Lake Saint-Louis off the Island of Montreal. It lies a short distance offshore from the city of Dorval and is connected with a seasonal ferry service.

The Island of Montreal is a large island in southwestern Quebec, Canada, that is the site of a number of municipalities, including most of the city of Montreal, and is the most populous island in Canada. It is the main island of the Hochelaga Archipelago at the confluence of the Saint Lawrence and Ottawa rivers.