The Varenne (French pronunciation: [vaʁɛn] ⓘ) is a 60.0 km (37.3 mi) long river in western France located in the departments of Orne (Normandy) and Mayenne (Pays de la Loire).

Its longest tributaries are the Égrenne, the Pisse [fr], the Halouze and the Andainette.

[1] The largest town on the Varenne is Domfront en Poiraie.

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