Jean Drapeau Park is the third-largest park in Montreal, Quebec, Canada. It comprises two islands, Saint Helen's Island and the artificial island Notre Dame Island, situated off the shore of Old Montreal in the Saint Lawrence River.

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.