Chiuduno (Bergamasque: ) is a comune (municipality) in the Province of Bergamo, in Italian region of Lombardy; Chiuduno is located about northeast of Milan and about southeast of Bergamo, midway between the Bergamo plain and the Valcalepio.
Chiuduno borders the following municipalities: Bolgare, Carobbio degli Angeli, Grumello del Monte, Telgate.
The settlement has Gaulish origins, and was later a Roman centre as Claudunum on the road between Bergamo and Brescia. It is however mentioned for the first time in a document from 795, and in the Middle Ages it developed and received a fortress.