| Castegnato | |
| Official Name: | Comune di Castegnato |
| Native Name: | Castegnàt |
| Coordinates: | 45.5667°N 17°W |
| Province: | (BS) |
| Area Total Km2: | 9 |
| Population Footnotes: | [1] |
| Population Total: | 8102 |
| Population As Of: | 2011 |
| Population Demonym: | Castegnatesi |
| Elevation M: | 143 |
| Saint: | San Vitale |
| Day: | Second Sunday in May |
| Postal Code: | 25045 |
| Area Code: | 030 |
| Istat: | 017040 |
| Frazioni: | Gussago, Ospitaletto, Paderno Franciacorta, Passirano, Rodengo-Saiano, Roncadelle, Travagliato |
Castegnato (Brescian: Castegnàt) is a town and comune in the Italian province of Brescia, in Lombardy.