Les Trois-Châteaux

{{Use dmy dates|date=August 2023}}

{{Infobox French commune

|name = Les Trois-Châteaux

|commune status = Commune

|image = Mairie Nanc St Amour Trois Châteaux 4.jpg

|caption = The town hall in Nanc-lès-Saint-Amour

|arrondissement = Lons-le-Saunier

|canton = Saint-Amour

|INSEE = 39378

|postal code = 39160

|mayor =

|term =

|intercommunality = Porte du Jura

|coordinates = {{coord|46.422|5.358|format=dms|display=inline,title}}

|elevation m =

|elevation min m = 199

|elevation max m = 596

|area km2 = 19.28

|population = {{France metadata Wikidata|population_total}}

|population date = {{France metadata Wikidata|population_as_of}}

|population footnotes = {{France metadata Wikidata|population_footnotes}}

}}

Les Trois-Châteaux ({{IPA|fr|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).[http://www.jura.gouv.fr/content/download/10084/83197/file/RAA%20N%C2%B011%20du%2026%20mars%202015.pdf Arrêté préfectoral] 18 March 2016, p103 {{in lang|fr}} On 1 January 2019, the former commune Saint-Jean-d'Étreux was merged into Les Trois-Châteaux.[https://www.legifrance.gouv.fr/eli/arrete/2018/11/22/TERB1905239A/jo/texte Arrêté préfectoral] 22 November 2018 {{in lang|fr}}