Le Croisty (French pronunciation: [lə kʁwasti]; Breton: Ar C'hroesti) is a commune in the Morbihan department of Brittany in north-western France.

Historically, the village belongs to Vannetais and Pays Pourlet.

Le Croisty is border by Priziac to the west, by Saint-Tugdual to the north, by Ploërdut to the east and by Saint-Caradec-Trégomel to the south.

Most of the hamlets consist of two or three houses but others are larger like the village of Cornhospital.

Inhabitants of Le Croisty are called in French Croistyates.