| Lucmau | |
| Commune Status: | Commune |
| Arrondissement: | Langon |
| Canton: | Le Sud-Gironde |
| Insee: | 33255 |
| Postal Code: | 33840 |
| Mayor: | Michel Estenaves[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.3428°N -0.3064°W |
| Elevation M: | 73 |
| Elevation Min M: | 48 |
| Elevation Max M: | 126 |
| Area Km2: | 66.73 |
Lucmau (pronounced as /fr/) is a commune in the Gironde department in Nouvelle-Aquitaine in southwestern France.