| Saint-Just-en-Bas | |
| Commune Status: | Commune |
| Arrondissement: | Montbrison |
| Canton: | Boën-sur-Lignon |
| Insee: | 42247 |
| Postal Code: | 42990 |
| Mayor: | Paul Duchampt[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Loire Forez |
| Coordinates: | 45.7317°N 3.8814°W |
| Elevation M: | 830 |
| Elevation Min M: | 670 |
| Elevation Max M: | 1174 |
| Area Km2: | 20.95 |
Saint-Just-en-Bas (in French pronounced as /sɛ̃ ʒy(st) ɑ̃ ba/) is a commune in the Loire department in central France.[2]