Campodolcino is a comune (municipality) in the Province of Sondrio in the Italian region Lombardy, located about 100 kilometres (62 mi) north of Milan and about 50 kilometres (31 mi) northwest of Sondrio, on the border with Switzerland. As of 31 December 2004, it had a population of 1,077 and an area of 48.3 square kilometres (18.6 sq mi).