Sandigliano is a comune (municipality) in the Province of Biella in the Italian region Piedmont, located about 50 kilometres (31 mi) northeast of Turin and about 8 kilometres (5 mi) southwest of Biella.

Sandigliano borders the following municipalities: Borriana, Cerrione, Gaglianico, Ponderano, Verrone.

Sandigliano was the birthplace of Ottavio Ottavi, 19th century agronomist and viticulturalist.