| Lauzach | |
| Native Name: | Laozag |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Lauzach (Morbihan).svg |
| Coordinates: | 47.6156°N -2.5433°W |
| Insee: | 56109 |
| Postal Code: | 56190 |
| Arrondissement: | Vannes |
| Canton: | Questembert |
| Mayor: | Patrice Le Penhuizic[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Questembert Communauté |
| Elevation Min M: | 17 |
| Elevation Max M: | 63 |
| Area Km2: | 10.76 |
Lauzach (in French pronounced as /lozak/; Breton: Laozag) is a commune in the Morbihan department of Brittany in north-western France.[2] Inhabitants of Lauzach are called in French Lauzachois.