Baiso is a comune (municipality) in the Province of Reggio Emilia in the Italian region Emilia-Romagna, located about 60 kilometres (37mi) west of Bologna and about 20 kilometres (12mi) south of Reggio Emilia.
Baiso borders the following municipalities: Carpineti, Castellarano, Prignano sulla Secchia, Toano, Viano.