Chaux (; German: Tscha) is a commune in the Territoire de Belfort department in Bourgogne-Franche-Comté in northeastern France. Chaux is located approximately south from the base of the Ballon d'Alsace mountain range, source of the Savoureuse river, north of Bern, Switzerland and north of Belfort, France. The immediate surrounding landscape is flat and arable.
Chaux is twinned with Brinzio, Italy (2013).