Boissy-sous-Saint-Yon (French pronunciation: [bwasi su sɛ̃.t‿jɔ̃] ⓘ, literally Boissy under Saint-Yon) is a commune in the Essonne department in Île-de-France in northern France.

Inhabitants of Boissy-sous-Saint-Yon are known as Buxéens in French.

This Essonne geographical article is a stub.

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