| Blandouet-Saint Jean | |
| Commune Status: | Commune |
| Arrondissement: | Mayenne |
| Canton: | Meslay-du-Maine |
| Insee: | 53228 |
| Postal Code: | 53270 |
| Mayor: | Patrick Cousin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Coëvrons |
| Coordinates: | 48.034°N -0.392°W |
| Area Km2: | 36.72 |
Blandouet-Saint Jean (in French pronounced as /blɑ̃dwɛ sɛ̃ ʒɑ̃/) is a commune in the department of Mayenne, western France. The municipality was established on 1 January 2017 by merger of the former communes of Saint-Jean-sur-Erve (the seat) and Blandouet.[2]