Ouanne (French pronunciation: [wan]) is a commune in the Yonne department in Bourgogne-Franche-Comté in north-central France,[3] in the natural region of Forterre.

Ouanne existed in Gallo-Roman times under the name of Odouna or Oduna.

[clarification needed] The ancient station of Ouanne is known from a marble fragment from the 3rd century, preserved at the museum of Autun.

The marble indicates the distances on the Roman road from Auxerre to Entrains-sur-Nohain.

[4] The river Ouanne, a 84 km (52 mi) long right tributary of the Loing, has its source in the commune.