|Province||Reggio Emilia (RE)|
|• Total||69.82 km2 (26.96 sq mi)|
|Elevation||830 m (2,720 ft)|
|Population (31 December 2015)|
|• Density||13/km2 (35/sq mi)|
|Time zone||UTC+1 (CET)|
|• Summer (DST)||UTC+2 (CEST)|
Collagna is a frazione of the comune (municipality) of Ventasso in the Province of Reggio Emilia in the Italian region Emilia-Romagna, located about 90 kilometres (56 mi) west of Bologna and about 50 kilometres (31 mi) southwest of Reggio Emilia. It was a separate comune until 1 January 2016.
- Giovanni Lindo Ferretti (b. 1953), singer-songwriter, born in Cerreto Alpi
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- All demographics and other statistics: Italian statistical institute Istat.
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