Cerreto Castello was a comune (municipality) in the Province of Biella in the Italian region Piedmont, located about 70 km (43 mi) northeast of Turin and about 8 km (5 mi) east of Biella.

As of 31 December 2004, it had a population of 662 and an area of 2.7 km2 (1 sq mi).

[1] As a comune Cerreto Castello bordered the following municipalities: Cossato, Quaregna, Valdengo, Vigliano Biellese.

From 1 January 2019 Cerrato Castello was absorbed by the new-born municipality of Quaregna Cerreto.

This article on a location in the Province of Biella is a stub.