| Cassiglio | |
| Official Name: | Comune di Cassiglio |
| Coordinates: | 45.9667°N 46°W |
| Region: | Lombardy |
| Province: | Bergamo (BG) |
| Mayor: | Fabio Bordogna |
| Area Total Km2: | 13.68 |
| Population Footnotes: | [1] |
| Population Total: | 110 |
| Population As Of: | 30 November 2017 |
| Population Demonym: | Cassigliesi |
| Elevation M: | 602 |
| Postal Code: | 24010 |
| Area Code: | 0345 |
Cassiglio (Bergamasque: Cassèi) is a comune (municipality) in the Province of Bergamo in the northern Italian region of Lombardy, located about 100km (100miles) northeast of Milan and about 45km (28miles) north of Bergamo.
Cassiglio borders the following municipalities: Camerata Cornello, Cusio, Olmo al Brembo, Ornica, Piazza Brembana, Santa Brigida, Taleggio, Valtorta, Vedeseta.