| Prémillieu | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Prémillieu (Ain).svg |
| Arrondissement: | Belley |
| Canton: | Plateau d'Hauteville |
| Insee: | 01311 |
| Postal Code: | 01110 |
| Mayor: | Pascal Torrion[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Haut-Bugey Agglomération |
| Coordinates: | 45.8742°N 5.5714°W |
| Elevation M: | 896 |
| Elevation Min M: | 580 |
| Elevation Max M: | 1084 |
| Area Km2: | 8.5 |
Prémillieu (in French pronounced as /pʁemiljø/) is a commune in the Ain department in eastern France.