| Lignan-sur-Orb | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Lignan-sur-Orb (Hérault).svg |
| Arrondissement: | Béziers |
| Canton: | Béziers-2 |
| Insee: | 34140 |
| Postal Code: | 34490 |
| Mayor: | Catherine Montaron Sanmarti[1] |
| Term: | 2022 - 2026 |
| Intercommunality: | Béziers Méditerranée |
| Coordinates: | 43.3847°N 3.1711°W |
| Elevation M: | 28 |
| Elevation Min M: | 9 |
| Elevation Max M: | 86 |
| Area Km2: | 3.41 |
| Demonym: | Lignanais, Lignanaises |
Lignan-sur-Orb (pronounced as /fr/, literally Lignan on Orb; oc|Linha d'Òrb) is a commune in the Hérault département in the Occitanie region in southern France.