| Saint-Martin-Saint-Firmin | |
| Commune Status: | Commune |
| Arrondissement: | Bernay |
| Canton: | Beuzeville |
| Insee: | 27571 |
| Postal Code: | 27450 |
| Mayor: | Anne-Marie Roelens[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.2864°N 0.5528°W |
| Elevation M: | 136 |
| Area Km2: | 6.37 |
Saint-Martin-Saint-Firmin (in French pronounced as /sɛ̃ maʁtɛ̃ sɛ̃ fiʁmɛ̃/) is a commune in the Eure department in Normandy in northern France.