Oullins, town, a residential and industrial suburb of Lyon, Rhône département, Auvergne-Rhône-Alpes région, southeast-central France. It has two 16th-century châteaus (Grand-Perron and Petit-Perron) and an 18th-century palace that was built by Pierre Cardinal de Tencin. Pop. (1999) 25,183; (2014 est.) 26,333.