Mantello (Lombard:
Mantèl) 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 704 and an area of 3.7 square kilometres (1.4 sq mi).