Piatto is a comune (municipality) in the Province of Biella in the Italian region Piedmont, located about 70 kilometres (43 mi) northeast of Turin and about 4 kilometres (2 mi) northwest of Biella. On 31 December 2004, it had a population of 527 and an area of 3.6 square kilometres (1.4 sq mi).[3]
Piatto borders the municipalities of Bioglio, Callabiana, Camandona, Mosso, Quaregna, Ternengo, Valdengo, Vallanzengo, Valle San Nicolao and Veglio.
Demographic evolution

References
- ^ "Superficie di Comuni Province e Regioni italiane al 9 ottobre 2011". Italian National Institute of Statistics. Retrieved 16 March 2019.
- ^ "Popolazione Residente al 1° Gennaio 2018". Italian National Institute of Statistics. Retrieved 16 March 2019.
- ^ All demographics and other statistics: Italian statistical institute Istat.