 The municipality consists of the village of Castel San Pietro, which is made up of the sections of Corteglia, Gorla, Loverciano, Obino as well as others.Since 2004, the former municipalities of Casima and Monte as well as the settlement of Campora (formerly part of the municipality of Caneggio) have been part of Castel San Pietro.Castel San Pietro has an area, , of .