Chailly-sur-Armançon (French pronunciation: [ʃaji syʁ aʁmɑ̃sɔ̃], lit.

"Chailly-on-Armançon") is a commune in the Côte-d'Or department in the Bourgogne-Franche-Comté region in Eastern France.

In 2020, it had a population of 253.

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