The Charentonne is a 63 km long river in Normandy, left tributary of the Risle.

[1] The river begins in pays d'Ouche (Orne), in the forest of Saint-Évroult, in the south of the Saint-Évroult-Notre-Dame-du-bois village and the ruins of the abbey where lived and died Orderic Vitalis (1075–1142).

The river runs, in a north-northeast direction, towards the Risle with which it joins at Serquigny.

The bottom of the valley is covered with clayed alluvions ; it is flat and wet, flooded in winter, with beautiful natural meadows, characteristic of Normandy.

The river and surrounding areas are parts of a protected Natura 2000 site called Risle, Guiel, Charentonne.