Les Breuleux (French pronunciation: [le bʁœlø]) is a municipality in the district of Franches-Montagnes in the Canton of Jura in Switzerland . On 1 January 2023 the former municipality of La Chaux-des-Breuleux merged to form the municipality of Les Breuleux.

Les Breuleux is first mentioned in 1429 as Les Bruilluit.

Les Breuleux has an area of 10.82 km2 (4.18 sq mi). Of this area, 6.72 km2 (2.59 sq mi) or 62.2% is used for agricultural purposes, while 3.26 km2 (1.26 sq mi) or 30.2% is forested. Of the rest of the land, 0.83 km2 (0.32 sq mi) or 7.7% is settled (buildings or roads) and 0.01 km2 (2.5 acres) or 0.1% is unproductive land.