| Douy | |
| Image Coat Of Arms: | Blason Douy.svg |
| Arrondissement: | Châteaudun |
| Canton: | Brou |
| Commune: | Cloyes-les-Trois-Rivières |
| Insee: | 28133 |
| Postal Code: | 28220 |
| Coordinates: | 48.0367°N 1.2711°W |
| Elevation M: | 120 |
| Elevation Min M: | 97 |
| Elevation Max M: | 146 |
| Area Km2: | 6.84 |
| Population: | 569 |
| Population Date: | 2019 |
| Population Footnotes: | [1] |
Douy (in French pronounced as /dwi/) was a commune in the Eure-et-Loir department in northern France. On 1 January 2017, it was merged into the new commune Cloyes-les-Trois-Rivières.[2]