Castellet may refer to:

People Queralt Castellet, Spanish snowboarder

Places France Castellet-en-Luberon, commune in the Vaucluse department Castellet-lès-Sausses, commune in the Alpes-de-Haute-Provence department

Spain Castellet i la Gornal, municipality in the comarca of the Alt Penedès Sant Vicenç de Castellet, municipality in the comarca of Bages

See also Le Castellet (disambiguation)