Val-de-Chalvagne (French pronunciation: [val də ʃalvaɲ], literally Vale of Chalvagne; Occitan: Vau de Chalvanha) is a commune in the Alpes-de-Haute-Provence department in southeastern France.

It was established in 1974 by the merger of the former communes Castellet-Saint-Cassien, Montblanc and Villevieille.

[3] The population data given in the table and graph below for 1968 and earlier refer to the former commune of Castellet-Saint-Cassien.

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