Saint-Denis-sur-Ouanne (French pronunciation: [sɛ̃ dəni syʁ wan], lit.

'Saint-Denis on Ouanne') is a former commune in the Yonne department in Bourgogne-Franche-Comté in north-central France.

On 1 January 2016, it was merged into the new commune of Charny-Orée-de-Puisaye.

[2] The river Ouanne formed most of the commune's southwestern border.

This Yonne geographical article is a stub.