The Aveyron is a 30 km (19 mi) long river in France, a right tributary of the Loing.The Aveyron flows into the Loing at Montbouy. Its discharge at La Chapelle-sur-Aveyron is 0.494 m3/s.It crosses the following departments and communes:Yonne: ChampcevraisLoiret: Le Charme, Saint-Maurice-sur-Aveyron, La Chapelle-sur-Aveyron, Montbouy