Chiavenna (Italian: [kjaˈvɛnna]; Lombard: Ciavèna [tʃaˈʋɛna]; Latin: Clavenna; Romansh: Clavenna [klaˈvɛnːɐ] or Claven; archaic German: Cläven or Kleven) is a comune (municipality) in the Province of Sondrio in the northern Italian region of Lombardy . It is the centre of the Alpine Valchiavenna region. The historic town is a member of the Cittaslow movement.

Chiavenna is located about 100 kilometres (62 mi) north of Milan and about 40 kilometres (25 mi) northwest of Sondrio. The town is situated on the right bank of the river Mera about 16 kilometres (10 mi) north of Lake Como . The river course leads up to Val Bregaglia in the east and the Swiss border at Castasegna .