Riolo Terme is a comune (municipality) in the Province of Ravenna in the Italian region Emilia-Romagna, located about 40 km southeast of Bologna and about 40 km southwest of Ravenna. Riolo Terme borders the following municipalities: Borgo Tossignano, Brisighella, Casola Valsenio, Castel Bolognese, Faenza, Imola. the main attraction of the town are the termal baths. Until 1957, the town was known as Riolo dei Bagni (Riolo of the Baths).