| Lavieu | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Lavieu (Loire).svg |
| Arrondissement: | Montbrison |
| Canton: | Montbrison |
| Insee: | 42117 |
| Postal Code: | 42560 |
| Mayor: | Bernard Tranchant[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Loire Forez |
| Coordinates: | 45.54°N 4.0356°W |
| Elevation M: | 720 |
| Elevation Min M: | 496 |
| Elevation Max M: | 771 |
| Area Km2: | 4.45 |
Lavieu (in French pronounced as /lavjø/) is a commune in the Loire department in central France.