|Comune di Castel d'Aiano|
|Metropolitan city||Bologna (BO)|
|• Total||45.3 km2 (17.5 sq mi)|
|Elevation||805 m (2,641 ft)|
|Population (Dec. 2004)|
|• Density||44/km2 (110/sq mi)|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
Castel d'Aiano is a comune (municipality) in the Province of Bologna in the Italian region Emilia-Romagna, located about 35 kilometres (22 mi) southwest of Bologna. As of 31 December 2004, it had a population of 1,973 and an area of 45.3 square kilometres (17.5 sq mi).
- All demographics and other statistics: Italian statistical institute Istat.
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