| Sainte-Opportune-la-Mare | |
| Commune Status: | Commune |
| Arrondissement: | Bernay |
| Canton: | Bourg-Achard |
| Insee: | 27577 |
| Postal Code: | 27680 |
| Mayor: | Alain Michalot[1] |
| Term: | 2020 - 2026 |
| Coordinates: | 49.4175°N 0.5439°W |
| Elevation Min M: | 1 |
| Elevation Max M: | 128 |
| Area Km2: | 10.89 |
Sainte-Opportune-la-Mare is a commune in the Eure department in Normandy in northern France.