| Saint-Étienne-l'Allier | |
| Commune Status: | Commune |
| Arrondissement: | Bernay |
| Canton: | Beuzeville |
| Insee: | 27538 |
| Postal Code: | 27450 |
| Mayor: | Jean-Charles Beauché[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.2664°N 0.5539°W |
| Elevation M: | 170 |
| Elevation Min M: | 85 |
| Elevation Max M: | 166 |
| Area Km2: | 11.32 |
Saint-Étienne-l'Allier (in French pronounced as /sɛ̃.t‿etjɛn lalje/) is a commune in the Eure department in the Normandy region in northern France.