Castellbell i el Vilar (Catalan pronunciation: [kəsˌteʎˈbeʎ i əl βiˈla]) is a municipality in the comarca of the Bages in Catalonia, Spain. It is situated at the point where the Llobregat river crosses the Prelittoral Range. The railway station serves both the FGC line R5 between Barcelona and Manresa and the Renfe line between Barcelona and Zaragoza. The C-1411 road links the municipality with Martorell and Manresa.

Castellbell i el Vilar
Municipality
Coat of arms
Castellbell i el Vilar Location in Catalonia Show map of Province of Barcelona Castellbell i el Vilar Castellbell i el Vilar (Spain) Show map of Spain
Coordinates: 41°38′2″N 1°51′50″E / 41.63389°N 1.86389°E / 41.63389; 1.86389
Country	Spain
Community	Catalonia
Province	Barcelona
Comarca	Bages
Government
• Mayor	Montserrat Badia Moreno (2015)[1]
Area [2]
• Total	28.5 km2 (11.0 sq mi)
Elevation	178 m (584 ft)
Population  (2018)[3]
• Total	3,599
• Density	130/km2 (330/sq mi)
Demonym(s)	Castellvilanenc, castellvilanenca
Website	castellbellielvilar.cat

Castellbell i el Vilar is known for its cotton industry, although agriculture is at least as important to the local economy. Castellbell castle (gothic, fourteenth century) was one of the two main points (along with Claramunt castle) controlling access to the lower Llobregat valley, and hence to Barcelona. The bridge over the Llobregat also dates from the fourteenth century.