| Sostegno | |
| Official Name: | Comune di Sostegno |
| Coordinates: | 45.65°N 24°W |
| Region: | Piedmont |
| Province: | Biella (BI) |
| Frazioni: | Casa del Bosco, Asei |
| Mayor: | Giuseppe Framorando |
| Area Total Km2: | 18.1 |
| Population Footnotes: | [1] |
| Population Total: | 761 |
| Population As Of: | 31 December 2010 |
| Population Demonym: | Sostegnèsi |
| Elevation M: | 378 |
| Postal Code: | 13868 |
| Area Code: | 015 |
Sostegno is a comune (municipality) in the Province of Biella in the Italian region Piedmont, located about 80km (50miles) northeast of Turin and about 20km (10miles) northeast of Biella.
Sostegno borders the following municipalities: Crevacuore, Curino, Lozzolo, Roasio, Serravalle Sesia, Villa del Bosco. Economy is based on the production of apples and wine.