Monistrol de Calders is a veelage in the province o Barcelona an autonomous commonty o Catalonie, Spain. The municipality covers a aurie o 21.96 square kilometre (8.48 sq mi) an as o 2011 haed a population o 689 fowk. Syne Mey 2015 it haes been pairt o the new comarca o Moianès; previously it wis in Bages.