Lamonzie-Montastruc
Commune
The church and surroundings in Lamonzie-Montastruc
Coat of arms
Location of Lamonzie-Montastruc
Lamonzie-Montastruc Show map of France Lamonzie-Montastruc Show map of Nouvelle-Aquitaine
Coordinates: 44°53′47″N 0°35′40″E / 44.8964°N 0.5944°E / 44.8964; 0.5944
Country	France
Region	Nouvelle-Aquitaine
Department	Dordogne
Arrondissement	Bergerac
Canton	Bergerac-2
Intercommunality	CA Bergeracoise
Government
• Mayor (2020–2026)	Jean-Michel Dreuil[1]
Area 1	20.66 km2 (7.98 sq mi)
Population  (2021)[2]	692
• Density	33/km2 (87/sq mi)
Time zone	UTC+01:00 (CET)
• Summer (DST)	UTC+02:00 (CEST)
INSEE/Postal code	24224 /24520
Elevation	48–162 m (157–531 ft) (avg. 65 m or 213 ft)
1 French Land Register data, which excludes lakes, ponds, glaciers > 1 km2 (0.386 sq mi or 247 acres) and river estuaries.

Lamonzie-Montastruc (French pronunciation: [lamɔ̃zi mɔ̃tastʁyk]; Occitan: La Móngia de Montastruc) is a commune in the Dordogne department in Nouvelle-Aquitaine in southwestern France. It boasts two primary chateaux. One is Le Château de Montastruc, an antique troglodytic site, then a fortress, arranged progressively through its 1500 years of history. Le Château de Montastruc is listed as a French Historical Monument. The other is Le Château de Bellegarde, originating from the 14th Century, although the interiors are of the 20th century.

• Communes of the Dordogne department
• Château de Bellegarde (Lamonzie-Montastruc)