Poligny is a commune in the Jura department in Bourgogne-Franche-Comté in eastern France. The town stands at the foot of the first plateau of the Jura region, with limestone cliffs rising to its east and south, and a steephead valley leading to the village of Vaux-sur-Poligny to the east. On the cliffs to the east is a notable cave, known as "Le Trou de la Lune"; on the cliffs to the south is a large cross, the "Croix du Dan".