Castagna is a small village in Carlopoli of the province of Catanzaro, Region of Calabria, Italy.

[citation needed] It is also home to the Abbey of Santa Maria di Corazzo.

The mountainous territory of Castagna, located in Sila Piccola, has belonged for many centuries to the University of Scigliano, a farmhouse of Cosenza, in the province of Calabria Citiore.

On September 23, 1832 Castagna, together with the village Colla, separated from Soveria Mannelli to form an independent municipality, which however did not have a long life.

Contrary to expectations, on August 23, 1869, the entire municipal territory was assigned to Carlopoli, including "Colla".