| Piré-sur-Seiche | |
| Native Name: | Pereg |
| Image Coat Of Arms: | Blason ville fr Piré-sur-Seiche (Ille-et-Vilaine).svg |
| Coordinates: | 48.0103°N -1.4292°W |
| Insee: | 35220 |
| Postal Code: | 35150 |
| Arrondissement: | Rennes |
| Canton: | Châteaugiron |
| Commune: | Piré-Chancé |
| Elevation Min M: | 31 |
| Elevation Max M: | 86 |
| Area Km2: | 36.34 |
| Population: | 2724 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Piré-sur-Seiche (in French pronounced as /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.