Montegridolfo is a comune (municipality) in the Province of Rimini in the Italian region Emilia-Romagna, located about 130 kilometres (81 mi) southeast of Bologna and about 20 kilometres (12 mi) southeast of Rimini.The municipality of Montegridolfo contains the frazioni (subdivisions, mainly villages and hamlets) Cabaldo, San Pietro, and Trebbio.Montegridolfo borders the following municipalities: Mondaino, Saludecio, Sant'Angelo in Lizzola, Tavullia.