the towns of Montreal North, St-Michel-de-Laval, St-Léonard-de-Port-Maurice, Montreal East, Pointe-aux-Trembles;
the parishes of Rivière-des-Prairies, St-Léonard-de-Port-Maurice, and St-Jean-de-Dieu Asylum; and * the municipality of Pont-Viau and the town of Laval-des-Rapides in Laval county..
In 1966, it was defined as consisting of:
the City of Pointe-aux-Trembles;
the Towns of Anjou and Montreal East;
the part of the City of Montreal bounded by Saint-Donat Street, the Towns of Anjou and Montreal East, and Saint-Lawrence River;
the part of the City of Montreal bounded by the Cities of Pointeaux-Trembles and Montreal North, the Towns of Anjou and Montreal East, and Des Prairies River.
In 1976, it was defined as consisting of:
the City of Pointe-aux-Trembles;
the Town of Montreal East;
the part of the City of Montreal bounded by the Cities of Pointeaux-Trembles and Montreal North, by the Towns of Anjou and Montreal East and by des Prairies River;
the part of the City of Montreal bounded by a line commencing from the Saint Lawrence River along Saint-Donat Street, the Canadian National Railway; the northeastern limit of the parish municipality of Saint-Jean-de-Dieu, Sherbrooke Street East, Highway 25, the limits of the towns of Anjou and Montreal East to the Saint Lawrence River.
In 1980, it was renamed "Montreal—Mercier". In 1987, Montreal—Mercier was split into Anjou—Rivière-Des-Prairies and a re-created Mercier riding. The new Mercier riding also incorporated territory from Gamelin riding.
