| Le Castellet | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason LeCastellet.svg |
| Arrondissement: | Forcalquier |
| Canton: | Riez |
| Insee: | 04041 |
| Postal Code: | 04700 |
| Mayor: | Benoît Gouin[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Durance-Luberon-Verdon Agglomération |
| Demonym: | Castellians |
| Coordinates: | 43.9394°N 5.9808°W |
| Elevation M: | 480 |
| Elevation Min M: | 362 |
| Elevation Max M: | 665 |
| Area Km2: | 18.87 |
Le Castellet (in French pronounced as /lə kastəlɛ/; Occitan: Lo Castelet) is a rural commune in the Alpes-de-Haute-Provence department in the Provence-Alpes-Côte d'Azur region in Southeastern France. It is located north of Valensole, east of the Valley of the Durance. In 2021 it had a population of 301.
The river Asse forms part of the commune's southern border.