| Saint-Pierre-sur-Orthe | |
| Arrondissement: | Mayenne |
| Canton: | Évron |
| Insee: | 53249 |
| Postal Code: | 53160 |
| Commune: | Vimartin-sur-Orthe |
| Coordinates: | 48.2117°N -0.2064°W |
| Elevation M: | 140 |
| Elevation Min M: | 122 |
| Elevation Max M: | 301 |
| Area Km2: | 31.66 |
| Population: | 463 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Saint-Pierre-sur-Orthe is a former commune in the Mayenne department in north-western France. On 1 January 2021, it was merged into the new commune Vimartin-sur-Orthe.[2]