| Grailhen | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Grailhen (65).svg |
| Arrondissement: | Bagnères-de-Bigorre |
| Canton: | Neste, Aure et Louron |
| Insee: | 65208 |
| Postal Code: | 65170 |
| Intercommunality: | Aure-Louron |
| Coordinates: | 42.8475°N 0.3622°W |
| Elevation M: | 1110 |
| Elevation Min M: | 1000 |
| Elevation Max M: | 1728 |
| Area Km2: | 6.06 |
Grailhen is a commune in the Hautes-Pyrénées department in south-western France.