| Susmiou | |
| Commune Status: | Commune |
| Arrondissement: | Oloron-Sainte-Marie |
| Canton: | Le Cœur de Béarn |
| Insee: | 64530 |
| Postal Code: | 64190 |
| Mayor: | Bruno Lannes[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Béarn des Gaves |
| Coordinates: | 43.3172°N -0.775°W |
| Elevation M: | 121 |
| Elevation Min M: | 117 |
| Elevation Max M: | 181 |
| Area Km2: | 3.50 |
Susmiou (in French pronounced as /sysmju/; Occitan (post 1500);: Susmior) is a commune in the Pyrénées-Atlantiques department in south-western France.