Quattro Castella (Reggiano: I Quâter Castē) is a comune (municipality) in the Province of Reggio Emilia in the Italian region Emilia-Romagna, located about 70 kilometres (43 mi) west of Bologna and about 15 kilometres (9 mi) southwest of Reggio Emilia.Quattro Castella borders the following municipalities: Albinea, Bibbiano, Reggio Emilia, San Polo d'Enza, Vezzano sul Crostolo.