| Gensac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason de la ville de Gensac (Hautes-Pyrénées).svg |
| Arrondissement: | Tarbes |
| Canton: | Val d'Adour-Rustan-Madiranais |
| Insee: | 65196 |
| Postal Code: | 65140 |
| Intercommunality: | Adour Madiran |
| Coordinates: | 43.4328°N 0.085°W |
| Elevation M: | 197 |
| Elevation Min M: | 190 |
| Elevation Max M: | 201 |
| Area Km2: | 3.44 |
Gensac is a commune in the Hautes-Pyrénées department in south-western France.