| Lavastrie | |
| Arrondissement: | Saint-Flour |
| Canton: | Neuvéglise |
| Insee: | 15099 |
| Postal Code: | 15260 |
| Commune: | Neuvéglise-sur-Truyère |
| Coordinates: | 44.9361°N 3.0431°W |
| Elevation M: | 975 |
| Elevation Min M: | 660 |
| Elevation Max M: | 1042 |
| Area Km2: | 24.14 |
| Population: | 244 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Lavastrie (in French pronounced as /lavastʁi/; Auvergnat: La Vàstria) is a former commune in the Cantal department in south-central France. On 1 January 2017, it was merged into the new commune Neuvéglise-sur-Truyère.[2]