Plessix-Balisson (French pronunciation: [plɛsi balisɔ̃]; Breton: Ar Genkiz-Yuzhael) is a former commune in the Côtes-d'Armor department of Brittany in northwestern France.

On 1 January 2017, it was merged into the new commune Beaussais-sur-Mer.

[2] With an area of only eight hectares, Plessix-Balisson was the smallest commune of the region and the second smallest in France, after Castelmoron-d'Albret.

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