| Le Boullay-Thierry | |
| Commune Status: | Commune |
| Arrondissement: | Dreux |
| Canton: | Dreux-2 |
| Insee: | 28055 |
| Postal Code: | 28210 |
| Mayor: | Frédéric Giroux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Pays de Dreux |
| Coordinates: | 48.6389°N 1.4311°W |
| Elevation M: | 150 |
| Elevation Min M: | 110 |
| Elevation Max M: | 176 |
| Area Km2: | 12.87 |
Le Boullay-Thierry (pronounced as /fr/) is a commune in the Eure-et-Loir department in France.