Piré-sur-Seiche (French pronunciation: [piʁe syʁ sɛʃ]; Breton: Pereg) is a former commune in the Ille-et-Vilaine department of Brittany in northwestern France.

On 1 January 2019, it was merged into the new commune Piré-Chancé.

[2] People from Piré-sur-Seiche are called Piréens in French.

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