The Odon (French pronunciation: [ɔdɔ̃]) is a river in the Calvados department, in Normandy, northwestern France.

It is 47 km long and is a left tributary of the Orne.

[1] The river passes through Jurques, Aunay-sur-Odon, Baron-sur-Odon, Bretteville-sur-Odon, Épinay-sur-Odon, Grainville-sur-Odon, Parfouru-sur-Odon, Tournay-sur-Odon and Tourville-sur-Odon.

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