Collagna
| Collagna | |
|---|---|
| Coordinates: 44°21′N 10°16′E / 44.350°N 10.267°E | |
| Country | Italy | 
| Region | Emilia-Romagna | 
| Province | Reggio Emilia (RE) | 
| Comune | Ventasso | 
| Area | |
|  • Total | 69.82 km2 (26.96 sq mi) | 
| Elevation | 830 m (2,720 ft) | 
| Population  (31 December 2015) | |
|  • Total | 942 | 
| • Density | 13/km2 (35/sq mi) | 
| Demonym | Collagnesi | 
| Time zone | UTC+1 (CET) | 
| • Summer (DST) | UTC+2 (CEST) | 
| Postal code | 42037 | 
| Dialing code | 0522 | 
Collagna (Emilian: Culâgna) is a frazione (borough) 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, when it was merged with Busana, Ligonchio and Ramiseto.
Collagna borders the Tuscan municipalities of Comano (MS), Fivizzano (MS) and the former municipality of Sillano (LU).