| Grande Tête de By | |
| Elevation M: | 3587 |
| Prominence M: | 67 |
| Prominence Ref: | [1] |
| Map: | Alps |
| Label Position: | top |
| Location: | Valais, Switzerland Aosta Valley, Italy |
| Range: | Pennine Alps |
| Coordinates: | 45.9198°N 7.2981°W |
The Grande Tête de By is a mountain of the Pennine Alps, located on the border between Italy and Switzerland. With a height of 3,587 metres above sea level, it is the highest summit on the Italian side of the Grand Combin massif.