The Ouanne (French pronunciation: [wan]) is an 84 km (52 mi) long river in central France, a right tributary of the Loing.

[1] Its source is near the small town of Ouanne, about 20 km (12 mi) southwest of Auxerre.

It flows generally northwest, and joins the Loing in Conflans-sur-Loing, near Amilly.

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