| Mérilheu | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Mérilheu (65).svg |
| Arrondissement: | Bagnères-de-Bigorre |
| Canton: | La Vallée de l'Arros et des Baïses |
| Insee: | 65310 |
| Postal Code: | 65200 |
| Mayor: | Michel Manse[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC de la Haute-Bigorre |
| Coordinates: | 43.095°N 0.1761°W |
| Elevation M: | 550 |
| Elevation Min M: | 449 |
| Elevation Max M: | 626 |
| Area Km2: | 3.38 |
Mérilheu (in French pronounced as /meʁijø/; Occitan (post 1500);: Merlhèu) is a commune in the Hautes-Pyrénées department in south-western France.