There is more than one place called Montmagny:

• Montmagny and the islands, a tourist region in Chaudière-Appalaches in Quebec.
• Montmagny (regional county municipality), a regional county municipality (RCM) in Chaudière-Appalaches, in Quebec.
• Montmagny (Quebec), a city in Quebec, capital of the regional county municipality of Montmagny (regional county municipality)

• Montmagny (Val-d'Oise), commune of Val-d'Oise.

• Montmagny (Vaud), commune of the canton of Vaud.

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