| Castelletto di Branduzzo | |
| Official Name: | Comune di Castelletto di Branduzzo |
| Coordinates: | 45.0667°N 15°W |
| Region: | Lombardy |
| Province: | Pavia (PV) |
| Mayor: | Antonino Lo Verso |
| Area Total Km2: | 11.77 |
| Population Footnotes: | [1] |
| Population Total: | 1022 |
| Population As Of: | 30 June 2017 |
| Population Demonym: | Castellettesi |
| Elevation M: | 70 |
| Postal Code: | 27040 |
| Area Code: | 0383 |
Castelletto di Branduzzo is a comune (municipality) in the Province of Pavia in the Italian region Lombardy, located about 45km (28miles) south of Milan and about 14km (09miles) southwest of Pavia.
Castelletto di Branduzzo borders the following municipalities: Bastida Pancarana, Bressana Bottarone, Casatisma, Lungavilla, Pancarana, Pizzale, Verretto.