Castel Guelfo di Bologna (Eastern Bolognese: Castèl Guêlf or Castelghèif) is a comune (municipality) in the Metropolitan City of Bologna in the Italian region Emilia-Romagna, located about 30km southeast of Bologna. Castel Guelfo di Bologna borders the following municipalities: Castel San Pietro Terme, Dozza, Imola, Medicina.
