Les Trois-Châteaux (French pronunciation: [le tʁwɑ ʃɑto]; "The Three Castles") is a commune in the Jura department of eastern France.

The municipality was established on 1 April 2016 by the merger of the former communes of L'Aubépin, Chazelles and Nanc-lès-Saint-Amour (the seat).

[2] On 1 January 2019, the former commune Saint-Jean-d'Étreux was merged into Les Trois-Châteaux.

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