| Saint-Just-Luzac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Saint-Just-Luzac (Charente-Maritime).svg |
| Arrondissement: | Rochefort |
| Canton: | Marennes |
| Insee: | 17351 |
| Postal Code: | 17320 |
| Mayor: | Ghislaine Le Rocheleuil-Begu[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Bassin de Marennes |
| Coordinates: | 45.8025°N -1.0367°W |
| Elevation M: | 5 |
| Elevation Min M: | 0 |
| Elevation Max M: | 18 |
| Area Km2: | 47.74 |
Saint-Just-Luzac (in French pronounced as /sɛ̃ ʒyst lyzak/) is a commune in the Charente-Maritime department in southwestern France.