Bourgoin-Jallieu is a commune in the Isère department in the region of Auvergne-Rhône-Alpes in France. The city had 28,834 inhabitants in …Bourgoin-Jallieu is a commune in the Isère department in the region of Auvergne-Rhône-Alpes in France. The city had 28,834 inhabitants in 2019 and lies 35 kilometres east-southeast of Lyon. It was formed by the merger of the former communes Bourgoin and Jallieu in 1965.