| Le Mesnil-en-Thelle | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason Mesnil-en-Thelle.svg |
| Arrondissement: | Senlis |
| Canton: | Chantilly |
| Insee: | 60398 |
| Postal Code: | 60530 |
| Mayor: | Nadia Moria[1] |
| Term: | 2023 - 2026 |
| Coordinates: | 49.1789°N 2.2864°W |
| Elevation M: | 45 |
| Elevation Min M: | 29 |
| Elevation Max M: | 101 |
| Area Km2: | 6.09 |
Le Mesnil-en-Thelle (pronounced as /fr/) is a commune in the Oise department in northern France.