| Montastruc | |
| Commune Status: | Commune |
| Arrondissement: | Bagnères-de-Bigorre |
| Canton: | La Vallée de l'Arros et des Baïses |
| Insee: | 65318 |
| Postal Code: | 65330 |
| Mayor: | Véronique Mazoué[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Plateau de Lannemezan |
| Coordinates: | 43.2189°N 0.3442°W |
| Elevation M: | 329 |
| Elevation Min M: | 311 |
| Elevation Max M: | 507 |
| Area Km2: | 12.34 |
Montastruc (pronounced as /fr/) is a commune in the Hautes-Pyrénées department in south-western France.