It is located some 20 km (12 mi) northwest of Autun, in the heart of Morvan Regional Natural Park. As of 2019, Cussy-en-Morvan had a population of 378. It covers an area of 34.77 km2 (13.42 sq mi).
Georges Leyton (code name Socrate), "one of the most popular leaders of the Resistance of the Morvan" in World War II, was buried in the local cemetery in Cussy-en-Morvan on 12 August 1944, after being shot by German occupying forces near the nearby village of La Celle-en-Morvan.[3][4]