Odalengo Piccolo (dialect: Audalèng) is a commune (comune) of the Province of Alessandria in the north-west Italian region Piedmont. At the start of 2009 it had a population of 264. It is located in the Val Cerrina about 40 km east of Turin, about 13 km north of Asti and some 20 km south-west of Casale Monferrato. The municipality extends over an area of 7.63 km² in the hills to the south of the Stura del Monferrato torrent where areas of woodland are interspersed by vineyards, and borders on the communes of Alfiano Natta, Castelletto Merli, Cerrina Monferrato, Odalengo Grande, and Villadeati.
The two principal centres of population are Serra (dialect: Sèra), the site of the town hall, and Vicinato (dialect: V’žinà) with the parish church; further nuclei are Palmaro (dialect: Cà di Parmàn), Dorato, and Pessine (dialect: Psìn-i) which is notable for its castle.
Odalengo Piccolo is known for the truffle fair Tufo & tartufo, which has been held during the autumn truffle season since 1994, and for the wide variety of antique native apple cultivars which are grown locally.
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