| Aulnay-sur-Mauldre | |
| Commune Status: | Commune |
| Arrondissement: | Mantes-la-Jolie |
| Canton: | Aubergenville |
| Insee: | 78033 |
| Postal Code: | 78126 |
| Mayor: | Jean Christophe Charbit[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CU Grand Paris Seine Oise |
| Coordinates: | 48.929°N 1.841°W |
| Elevation M: | 35 |
| Elevation Min M: | 22 |
| Elevation Max M: | 126 |
| Area Km2: | 2.23 |
Aulnay-sur-Mauldre (pronounced as /fr/) is a commune in the Yvelines department in north-central France.