Gensac-de-Boulogne (French pronunciation: [ʒɑ̃sak də bulɔɲ], literally Gensac of Boulogne; Occitan: Gençac de Bolonha) is a commune in the Haute-Garonne department in southwestern France.
The river Gesse forms part of the commune's eastern border; the Gimone forms part of its western border.
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