| Préchac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Préchac (Gironde).svg |
| Arrondissement: | Langon |
| Canton: | Le Sud-Gironde |
| Insee: | 33336 |
| Postal Code: | 33730 |
| Mayor: | Michel Mortagne[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.4006°N -0.3519°W |
| Elevation M: | 45 |
| Elevation Min M: | 26 |
| Elevation Max M: | 93 |
| Area Km2: | 63.87 |
Préchac (in French pronounced as /pʁeʃak/; Occitan (post 1500);: Preishac) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.