| Marcieu | |
| Commune Status: | Commune |
| Arrondissement: | Grenoble |
| Canton: | Matheysine-Trièves |
| Insee: | 38217 |
| Postal Code: | 38350 |
| Mayor: | Fabienne Prévot[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 44.9156°N 5.6903°W |
| Elevation Min M: | 485 |
| Elevation Max M: | 1729 |
| Area Km2: | 12 |
Marcieu (in French pronounced as /maʁsjø/) is a commune in the Isère department in southeastern France.