Monterblanc
| Monterblanc Sterwenn | |
|---|---|
| The Ytrac roundabout, in Monterblanc | |
| Location of Monterblanc | |
| Coordinates: 47°44′36″N 2°40′49″W / 47.7433°N 2.6803°W | |
| Country | France | 
| Region | Brittany | 
| Department | Morbihan | 
| Arrondissement | Vannes | 
| Canton | Vannes-3 | 
| Intercommunality | Golfe du Morbihan - Vannes Agglomération | 
| Government | |
| • Mayor (2020–2026) | Alban Moquet | 
| Area 1 | 25.41 km2 (9.81 sq mi) | 
| Population  (2022) | 3,342 | 
| • Density | 130/km2 (340/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 56137 /56250 | 
| Elevation | 46–151 m (151–495 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Monterblanc (French pronunciation: [mɔ̃tɛʁblɑ̃]; Breton: Sterwenn) is a commune in the Morbihan department and Brittany region of north-western France.