| Brienno | |
| Official Name: | Comune di Brienno |
| Coordinates: | 45.9°N 17°W |
| Region: | Lombardy |
| Province: | Como (CO) |
| Mayor: | Francesco Cavadini |
| Area Total Km2: | 9.1 |
| Population Footnotes: | [1] |
| Population Total: | 337 |
| Population As Of: | 31 March 2017 |
| Population Demonym: | Briennesi |
| Elevation M: | 203 |
| Postal Code: | 22010 |
| Area Code: | 031 |
Brienno (Comasco: Brienn pronounced as /briˈɛn/) is a comune (municipality) in the Province of Como in the Italian region of Lombardy, located about 50km (30miles) north of Milan and about 10km (10miles) northeast of Como.
Brienno borders the following municipalities: Argegno, Carate Urio, Laglio, Nesso, and Schignano.