| Allaines-Mervilliers | |
| Arrondissement: | Chartres |
| Canton: | Voves |
| Insee: | 28002 |
| Postal Code: | 28310 |
| Commune: | Janville-en-Beauce |
| Coordinates: | 48.205°N 1.825°W |
| Elevation M: | 136 |
| Elevation Min M: | 124 |
| Elevation Max M: | 142 |
| Area Km2: | 22.22 |
| Population: | 246 |
| Population Date: | 2021 |
| Population Footnotes: | [1] |
Allaines-Mervilliers (in French pronounced as /alɛn mɛʁvilje/) is a former commune in the Eure-et-Loir department in northern France. On 1 January 2019, it was merged into the new commune of Janville-en-Beauce.[2]