Valdengo is a comune (municipality) in the Province of Biella in the Italian region Piedmont, located about 60 kilometres (37 mi) northeast of Turin and about 3 kilometres (2 mi) southeast of Biella.

Valdengo borders the following municipalities: Candelo, Cerreto Castello, Piatto, Quaregna, Ronco Biellese, Ternengo, Vigliano Biellese.