| Montrelais | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Montrelais (Loire-Atlantique).svg |
| Arrondissement: | Châteaubriant-Ancenis |
| Canton: | Ancenis-Saint-Géréon |
| Insee: | 44104 |
| Postal Code: | 44370 |
| Mayor: | Joël Jamin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays d'Ancenis |
| Coordinates: | 47.3897°N -0.9653°W |
| Elevation Min M: | 7 |
| Elevation Max M: | 62 |
| Area Km2: | 13.73 |
Montrelais (in French pronounced as /mɔ̃tʁəlɛ/; Breton: Mousterlez) is a commune in the Loire-Atlantique department in western France.