The canton of Brienon-sur-Armançon is an administrative division of the Yonne department, central France. Its borders were modified at the French canton reorganisation which came into effect in March 2015. Its seat is in Brienon-sur-Armançon.

It consists of the following communes:

Arces-Dilo Bagneaux Bellechaume Bœurs-en-Othe Brienon-sur-Armançon Cérilly Cerisiers Champlost Les Clérimois Coulours Courgenay Esnon Flacy Foissy-sur-Vanne Fontaine-la-Gaillarde Fournaudin Lailly Malay-le-Petit Mercy Molinons Noé Paroy-en-Othe Pont-sur-Vanne La Postolle Saint-Maurice-aux-Riches-Hommes Saligny Les Sièges Les Vallées-de-la-Vanne Vaudeurs Vaumort Venizy Villechétive Villeneuve-l'Archevêque Villiers-Louis

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