| Lansac | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Lansac (65).svg |
| Arrondissement: | Tarbes |
| Canton: | Les Coteaux |
| Insee: | 65259 |
| Postal Code: | 65350 |
| Mayor: | Christian Giuge[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Coteaux du Val d'Arros |
| Coordinates: | 43.2242°N 0.1653°W |
| Elevation M: | 332 |
| Elevation Min M: | 250 |
| Elevation Max M: | 406 |
| Area Km2: | 3.87 |
Lansac (pronounced as /fr/; oc|Lançac) is a commune in the Hautes-Pyrénées department in south-western France.