| Castellet-en-Luberon | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Castellet (Vaucluse).svg |
| Arrondissement: | Apt |
| Canton: | Apt |
| Insee: | 84033 |
| Postal Code: | 84400 |
| Mayor: | Roger Isnard[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CC Pays d'Apt-Luberon |
| Demonym: | Castellans |
| Coordinates: | 43.8397°N 5.478°W |
| Elevation M: | 510 |
| Elevation Min M: | 279 |
| Elevation Max M: | 1120 |
| Area Km2: | 9.84 |
Castellet-en-Luberon ("Castellet-in-Luberon; Occitan: Lo Castelet), known simply as Castellet until 2018,[2] is a commune in the Vaucluse department in the Provence-Alpes-Côte d'Azur region in Southeastern France. In 2021, it had a population of 113.
The river Calavon forms all of the commune's northern border.