| Ouanne | |
| Map: | Ouanne (rivière).png |
| Mouth Coordinates: | 47.9533°N 2.7806°W |
| Subdivision Type1: | Country |
| Length: | 84km (52miles) |
| Discharge1 Avg: | 4.8m3/s |
| Basin Size: | 950km2 |
The Ouanne (in French pronounced as /wan/) is an 84km (52miles) long river in central France, a right tributary of the Loing.
Its source is near the small town of Ouanne, about 20km (10miles) southwest of Auxerre. It flows generally northwest, and joins the Loing in Conflans-sur-Loing, near Amilly.
It crosses the following departments and towns:
Ouanne, Leugny, Moulins-sur-Ouanne, Toucy, Dracy, Villiers-Saint-Benoît, Grandchamp, Saint-Denis-sur-Ouanne, Malicorne, Saint-Martin-sur-Ouanne, Charny, Chêne-Arnoult
Douchy, Triguères, Château-Renard, Gy-les-Nonains, Saint-Germain-des-Prés, Conflans-sur-Loing