Dubino (Lombard: Dübin) is a comune (municipality) in the Province of Sondrio in the Italian region of Lombardy , located about 80 kilometres (50 mi) northeast of Milan and about 30 kilometres (19 mi) west of Sondrio. As of 31 December 2004, it had a population of 3,270 and an area of 13.1 square kilometres (5.1 sq mi).

Dubino borders the following municipalities: Andalo Valtellino , Cino , Delebio , Gera Lario , Mantello , Novate Mezzola , Piantedo , Sorico , Verceia .