Agazzano (Piacentino: Gasàn) is a comune (municipality) in the Province of Piacenza in the Italian region Emilia-Romagna, located about 150 km northwest of Bologna and about 20 km southwest of Piacenza. Among the main sites is the much refurbished and amplified Agazzano Castle, still a private residence of descendants of the original owners. Agazzano borders the following municipalities: Borgonovo Val Tidone, Gazzola, Gragnano Trebbiense, Pianello Val Tidone, Piozzano.