| Saint-Jean-sur-Erve | |
| Arrondissement: | Mayenne |
| Canton: | Meslay-du-Maine |
| Commune: | Blandouet-Saint Jean |
| Insee: | 53228 |
| Postal Code: | 53270 |
| Coordinates: | 48.0353°N -0.3906°W |
| Elevation M: | 70 |
| Elevation Min M: | 58 |
| Elevation Max M: | 119 |
| Area Km2: | 25.39 |
| Population: | 386 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Saint-Jean-sur-Erve (in French pronounced as /sɛ̃ ʒɑ̃ syʁ ɛʁv/) is a former commune in the Mayenne department in north-western France. On 1 January 2017, it was merged into the new commune Blandouet-Saint Jean.[2]