| Madonna del Sasso | |
| Official Name: | Comune di Madonna del Sasso |
| Coordinates: | 45.8°N 30°W |
| Region: | Piedmont |
| Province: | Verbano-Cusio-Ossola (VB) |
| Frazioni: | Artò, Boleto (municipal seat), Centonara, Piana dei Monti |
| Mayor: | Ezio Barbetta |
| Area Total Km2: | 15.41 |
| Population Total: | 399 |
| Population As Of: | 31 December 2010 |
| Population Demonym: | Varies according to the frazione |
| Elevation M: | 696 |
| Saint: | Varies according to the frazione |
| Day: | Varies according to the frazione |
| Postal Code: | 28010 |
| Area Code: | 0322 |
Madonna del Sasso is a comune (municipality) in the Province of Verbano-Cusio-Ossola in the Italian region of Piedmont, located about 100km (100miles) northeast of Turin and about 20km (10miles) southwest of Verbania, just to the west of Lake Orta. The municipal seat is in the frazione of Boleto.
It borders the following municipalities: Arola, Cellio con Breia, Cesara, Civiasco, Pella, Pogno, San Maurizio d'Opaglio, Valduggia, Varallo Sesia.