Vallons-de-l'Erdre
Vallons-de-l'Erdre 
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Location of Vallons-de-l'Erdre  | |
| Coordinates: 47°31′34″N 1°11′01″W / 47.5261°N 1.1836°W | |
| Country | France | 
| Region | Pays de la Loire | 
| Department | Loire-Atlantique | 
| Arrondissement | Châteaubriant-Ancenis | 
| Canton | Ancenis-Saint-Géréon | 
| Intercommunality | Pays d'Ancenis | 
| Government | |
| • Mayor (2020–2026) | Jean-Yves Ploteau | 
Area 1  | 189.21 km2 (73.05 sq mi) | 
| Population  (2022)  | 6,625 | 
| • Density | 35/km2 (91/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 44180 /44540  | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Vallons-de-l'Erdre (French pronunciation: [valɔ̃ də lɛʁdʁ] ⓘ; Breton: Saonioù-an-Erzh) is a commune in the department of Loire-Atlantique, western France. The municipality was established on 1 January 2018 by merger of the former communes of Saint-Mars-la-Jaille (the seat), Bonnœuvre, Freigné (part of the department of Maine-et-Loire before 2018), Maumusson, Saint-Sulpice-des-Landes and Vritz.