| Mareil-en-Champagne | |
| Commune Status: | Commune |
| Arrondissement: | La Flèche |
| Canton: | Loué |
| Insee: | 72184 |
| Postal Code: | 72540 |
| Mayor: | Christophe Busson[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Loué - Brûlon - Noyen |
| Coordinates: | 47.985°N -0.168°W |
| Elevation Min M: | 52 |
| Elevation Max M: | 127 |
| Area Km2: | 7.97 |
Mareil-en-Champagne (pronounced as /fr/) is a commune in the Sarthe department in the region of Pays de la Loire in north-western France.
The river Vègre forms part of the commune's north-eastern border, flows southwestward through the commune, then forms most of its south-western border.