Saint Helen's Island is an island in the Saint Lawrence River, in the territory of the city of Montreal, Quebec, Canada. It forms part of the Hochelaga Archipelago. It is situated immediately offshore from Old Montreal on the southeastern side of the Island of Montreal in southwestern Quebec, and is part of the central borough of Ville-Marie. The Le Moyne Channel separates it from Notre Dame Island. Saint Helen's Island and Notre Dame Island together make up Jean-Drapeau Park.

The Hochelaga Archipelago, also known as the Montreal Islands, is a group of islands at the confluence of the Saint Lawrence and Ottawa rivers in the southwestern part of the province of Quebec, Canada.