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Voiron is a commune (French municipality) in the ninth district of the Isère department in southeastern France. It is the capital of the canton of Voiron and has been part of the Grenoble-Alpes Métropole since 2010. Voiron is located 25 km northwest of Grenoble and 85 km southeast of Lyon. Its roughly 20,000 inhabitants are named Voironnais in French.
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