Bain-de-Bretagne
Bain-de-Bretagne 
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Town hall  | |
Location of Bain-de-Bretagne  | |
| Coordinates: 47°50′35″N 1°40′50″W / 47.8431°N 1.6806°W | |
| Country | France | 
| Region | Brittany | 
| Department | Ille-et-Vilaine | 
| Arrondissement | Redon | 
| Canton | Bain-de-Bretagne | 
| Intercommunality | Bretagne Porte de Loire | 
| Government | |
| • Mayor (2024–2026) | Myriam Gohier | 
Area 1  | 64.77 km2 (25.01 sq mi) | 
| Population  (2022)  | 7,704 | 
| • Density | 120/km2 (310/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 35012 /35470  | 
| Elevation | 17–114 m (56–374 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Bain-de-Bretagne (Breton: Baen-Veur, Gallo: Bóen) is a commune in the Ille-et-Vilaine department in Brittany in northwestern France.