Bourg-en-Bresse is the prefecture of the Ain department in the Auvergne-Rhône-Alpes region in Eastern France. Located 70 km northeast of L…Bourg-en-Bresse is the prefecture of the Ain department in the Auvergne-Rhône-Alpes region in Eastern France. Located 70 km northeast of Lyon, it is the capital of the ancient province of Bresse. In 2018, the commune had a population of 41,248.