| Séméacq-Blachon | |
| Commune Status: | Commune |
| Arrondissement: | Pau |
| Canton: | Terres des Luys et Coteaux du Vic-Bilh |
| Insee: | 64517 |
| Postal Code: | 64350 |
| Mayor: | Hélène Desjentils[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Nord-Est Béarn |
| Coordinates: | 43.5003°N -0.1108°W |
| Elevation M: | 232 |
| Elevation Min M: | 153 |
| Elevation Max M: | 298 |
| Area Km2: | 10.92 |
Séméacq-Blachon (in French pronounced as /semeak blaʃɔ̃/; Occitan (post 1500);: Semiac e Blaishon) is a commune in the Pyrénées-Atlantiques department in south-western France.