 Until the beginning of the 15th century, Menzonio and Brontallo formed a single municipality, and together with Bignasco and Cavergno it formed a "Vicinanza" which was under the jurisdiction of the Lavizzara valley.At the time of the Swiss Confederation rule over Ticino, Menzonio was one of seven villages in the valley.The village church was part of the parish of Cevio until 1513 when it split away to form a parish with Brontallo.