The Airain or Airin (French pronunciation: [ɛʁɛ̃]) is a 47.8 km (29.7 mi) long river in the Cher department in central France.

It is a left tributary of the Yèvre, into which it flows at Savigny-en-Septaine, 13 km (8.1 mi) southeast of Bourges.

This list is ordered from source to mouth: Nérondes, Tendron, Bengy-sur-Craon, Flavigny, Cornusse, Ourouer-les-Bourdelins, Charly, Lugny-Bourbonnais, Osmery, Bussy, Vornay, Dun-sur-Auron, Crosses, Savigny-en-Septaine,

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