| Castello di Brianza | |
| Official Name: | Comune di Castello di Brianza |
| Coordinates: | 45.7667°N 29°W |
| Region: | Lombardy |
| Province: | Lecco (LC) |
| Mayor: | Aldo Riva |
| Area Total Km2: | 3.6 |
| Population Footnotes: | [1] |
| Population Total: | 2568 |
| Population As Of: | 1 January 2014 |
| Population Demonym: | Brianzollesi |
| Elevation M: | 394 |
| Postal Code: | 22040 |
| Area Code: | 039 |
Castello di Brianza (Brianzöö: Castél) is a comune (municipality) in the Province of Lecco in the Italian region Lombardy, located about 35km (22miles) northeast of Milan and about 11km (07miles) southwest of Lecco.
Castello di Brianza borders the following municipalities: Barzago, Colle Brianza, Dolzago, Rovagnate, Santa Maria Hoè, Sirtori.