| Montastruc-de-Salies | |
| Commune Status: | Commune |
| Arrondissement: | Saint-Gaudens |
| Canton: | Bagnères-de-Luchon |
| Insee: | 31357 |
| Postal Code: | 31160 |
| Mayor: | Bertrand Lacarrere[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Cagire Garonne Salat |
| Coordinates: | 43.0306°N 0.8939°W |
| Elevation M: | 400 |
| Elevation Min M: | 327 |
| Elevation Max M: | 811 |
| Area Km2: | 16.12 |
Montastruc-de-Salies (in French pronounced as /mɔ̃tastʁyk də sali/; Occitan (post 1500);: Montastruc de Salias) is a commune in the Haute-Garonne department in southwestern France.