Chiuro is a comune (municipality) in the Province of Sondrio in the Italian region Lombardy, located about 100 kilometres (62mi) northeast of Milan and about 9 kilometres (6mi) east of Sondrio, on the border with Switzerland. As of 31 December 2004, it had a population of 2,499 and an area of 51.8 square kilometres (20.0sqmi).