Tremblay, Ille-et-Vilaine
Tremblay 
    Kreneg  | |
|---|---|
Part of Val-Couesnon   | |
The church in Tremblay  | |
Location of Tremblay  | |
| Coordinates: 48°25′23″N 1°28′29″W / 48.4231°N 1.4747°W | |
| Country | France | 
| Region | Brittany | 
| Department | Ille-et-Vilaine | 
| Arrondissement | Fougères-Vitré | 
| Canton | Antrain | 
| Commune | Val-Couesnon | 
Area 1  | 36.22 km2 (13.98 sq mi) | 
| Population  (2022)  | 1,482 | 
| • Density | 41/km2 (110/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| Postal code | 35460  | 
| Elevation | 10–116 m (33–381 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Tremblay (French pronunciation: [tʁɑ̃blɛ]; Breton: Kreneg) is a former commune in the Ille-et-Vilaine department of Brittany in northwestern France. On 1 January 2019, it was merged into the new commune Val-Couesnon.
The botanist René Louiche Desfontaines (1750–1833) was born near Tremblay.