| Saint-Ouen-en-Champagne | |
| Commune Status: | Commune |
| Arrondissement: | La Flèche |
| Canton: | Loué |
| Insee: | 72307 |
| Postal Code: | 72350 |
| Mayor: | Dominique Guerriau[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Loué-Brûlon-Noyen |
| Coordinates: | 47.9508°N -0.1886°W |
| Elevation Min M: | 52 |
| Elevation Max M: | 121 |
| Area Km2: | 11.2 |
| Demonym: | Audonien, Audonienne |
Saint-Ouen-en-Champagne (in French pronounced as /sɛ̃t‿wɛ̃ ɑ̃ ʃɑ̃paɲ/) is a commune in the Sarthe department in the region of Pays de la Loire in north-western France.
The river Vègre forms all of the commune's northern border.