The canton of Castelginest is an administrative division of the Haute-Garonne department, southern France. It was created at the French canton reorganisation which came into effect in March 2015. Its seat is in Castelginest.
It consists of the following communes:
Aucamville Bruguières Castelginest Fenouillet Fonbeauzard Gagnac-sur-Garonne Gratentour Lespinasse Saint-Alban Saint-Jory
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