| Saint-Just | |
| Arrondissement: | Saint-Flour |
| Canton: | Neuvéglise |
| Insee: | 15195 |
| Postal Code: | 15320 |
| Commune: | Val-d'Arcomie |
| Coordinates: | 44.8914°N 3.2094°W |
| Elevation M: | 880 |
| Elevation Min M: | 868 |
| Elevation Max M: | 1087 |
| Area Km2: | 17.06 |
| Population: | 191 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Saint-Just (in French pronounced as /sɛ̃ ʒy(st)/; Auvergnat: Sant Just) is a former commune in the Cantal department in south-central France. On 1 January 2016, it was merged into the new commune Val-d'Arcomie.[2]