Netro is a comune (municipality) in the Province of Biella in the Italian region Piedmont, located about northeast of Turin and about southwest of Biella. As of 31 December 2004, it had a population of 1,010 and an area of .
The municipality of Netro contains the frazioni (subdivisions, mainly villages and hamlets) Castellazzo and Colla di Netro.
Netro borders the following municipalities: Donato, Graglia, Mongrando.