| Les Trois-Châteaux | |
| Commune Status: | Commune |
| Arrondissement: | Lons-le-Saunier |
| Canton: | Saint-Amour |
| Insee: | 39378 |
| Postal Code: | 39160 |
| Intercommunality: | Porte du Jura |
| Coordinates: | 46.422°N 5.358°W |
| Elevation Min M: | 199 |
| Elevation Max M: | 596 |
| Area Km2: | 19.28 |
Les Trois-Châteaux (pronounced as /fr/; "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).[1] On 1 January 2019, the former commune Saint-Jean-d'Étreux was merged into Les Trois-Châteaux.[2]