Monchy-Lagache
| Monchy-Lagache | |
|---|---|
| The church in Monchy-Lagache | |
| Location of Monchy-Lagache | |
| Coordinates: 49°51′09″N 3°02′43″E / 49.8525°N 3.0453°E | |
| Country | France | 
| Region | Hauts-de-France | 
| Department | Somme | 
| Arrondissement | Péronne | 
| Canton | Ham | 
| Intercommunality | CC Est de la Somme | 
| Government | |
| • Mayor (2020–2026) | Jacques Pinchon | 
| Area 1 | 15.44 km2 (5.96 sq mi) | 
| Population  (2022) | 574 | 
| • Density | 37/km2 (96/sq mi) | 
| Time zone | UTC+01:00 (CET) | 
| • Summer (DST) | UTC+02:00 (CEST) | 
| INSEE/Postal code | 80555 /80200 | 
| Elevation | 57–95 m (187–312 ft) (avg. 74 m or 243 ft) | 
| 1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries. | |
Monchy-Lagache (French pronunciation: [mɔ̃ʃi laɡaʃ]) is a commune in the Somme department in Hauts-de-France in northern France.