Castel del Rio
| Castel del Rio | |
|---|---|
| Comune di Castel del Rio | |
| Ponte Alidosi. | |
| Location of Castel del Rio | |
| Coordinates: 44°12′N 11°30′E / 44.200°N 11.500°E | |
| Country | Italy | 
| Region | Emilia-Romagna | 
| Metropolitan city | Bologna (BO) | 
| Frazioni | Belvedere, Giugnola, Moraduccio, Valsalva | 
| Government | |
| • Mayor | Alberto Baldazzi | 
| Area | |
|  • Total | 52.56 km2 (20.29 sq mi) | 
| Elevation | 215 m (705 ft) | 
| Population  (31 May 2017) | |
|  • Total | 1,229 | 
| • Density | 23/km2 (61/sq mi) | 
| Demonym | Alidosiani | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Postal code | 40022 | 
| Dialing code | 0542 | 
| Patron saint | St. Ambrose | 
| Website | Official website | 
Castel del Rio (Romagnol: Castel d'e' Rì) is a comune (municipality) in the Metropolitan City of Bologna in the Italian region Emilia-Romagna, located about 35 kilometres (22 mi) southwest of Bologna.
Historically, the town's countryside is a large producer of chestnut, which has received the European Protected Geographical Status.