| Orvanne | |
| Map: | Orvanne.png |
| Mouth Coordinates: | 48.3779°N 2.8182°W |
| Subdivision Type1: | Country |
| Length: | 38.8km (24.1miles) |
The Orvanne (in French pronounced as /ɔʁvan/) is a 38.8km (24.1miles) long river in northern France located in the departments of Yonne (Bourgogne-Franche-Comté) and Seine-et-Marne (Île-de-France). It is a tributary of the river Loing on the right side, and so is a sub-tributary of the Seine. Its source is in the commune of Saint-Valérien, and it flows into the Loing in Moret-sur-Loing. The largest towns on the Orvanne are Voulx and Moret-Loing-et-Orvanne.