| Châtaincourt | |
| Commune Status: | Commune |
| Arrondissement: | Dreux |
| Canton: | Saint-Lubin-des-Joncherets |
| Insee: | 28087 |
| Postal Code: | 28270 |
| Mayor: | Emmanuel Bridron[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Pays de Dreux |
| Coordinates: | 48.6953°N 1.2283°W |
| Elevation M: | 160 |
| Elevation Min M: | 139 |
| Elevation Max M: | 176 |
| Area Km2: | 14.82 |
Châtaincourt (pronounced as /fr/) is a commune in the Eure-et-Loir department in northern France.