Gien-sur-Cure (, ) is a commune in the Nièvre department in the Bourgogne-Franche-Comté region in central-east France. As of 2023, the population of the commune was 90. Part of Morvan Regional Natural Park, Gien-sur-Cure is located on the departmental border with both Saône-et-LoireâÂÂat Anost and Cussy-en-MorvanâÂÂand Côte-d'OrâÂÂat the Ménessaire exclave.